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617ea07c22
FFmpeg/fftools/ffmpeg_mux_init.c
Anton Khirnov 2fa2e146cc fftools/ffmpeg: avoid storing full forced keyframe spec 
It is not needed after the spec is parsed. Also avoids ugly string
comparisons for each video frame.
2022-11-28 10:28:14 +01:00

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/*
* Muxer/output file setup.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "cmdutils.h"
#include "ffmpeg.h"
#include "ffmpeg_mux.h"
#include "fopen_utf8.h"
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
#include "libavcodec/avcodec.h"
#include "libavfilter/avfilter.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/avutil.h"
#include "libavutil/bprint.h"
#include "libavutil/dict.h"
#include "libavutil/getenv_utf8.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
static const char *const opt_name_apad[] = {"apad", NULL};
static const char *const opt_name_autoscale[] = {"autoscale", NULL};
static const char *const opt_name_bits_per_raw_sample[] = {"bits_per_raw_sample", NULL};
static const char *const opt_name_bitstream_filters[] = {"bsf", "absf", "vbsf", NULL};
static const char *const opt_name_copy_initial_nonkeyframes[] = {"copyinkf", NULL};
static const char *const opt_name_copy_prior_start[] = {"copypriorss", NULL};
static const char *const opt_name_disposition[] = {"disposition", NULL};
static const char *const opt_name_enc_time_bases[] = {"enc_time_base", NULL};
static const char *const opt_name_filters[] = {"filter", "af", "vf", NULL};
static const char *const opt_name_filter_scripts[] = {"filter_script", NULL};
static const char *const opt_name_fps_mode[] = {"fps_mode", NULL};
static const char *const opt_name_force_fps[] = {"force_fps", NULL};
static const char *const opt_name_forced_key_frames[] = {"forced_key_frames", NULL};
static const char *const opt_name_frame_aspect_ratios[] = {"aspect", NULL};
static const char *const opt_name_intra_matrices[] = {"intra_matrix", NULL};
static const char *const opt_name_inter_matrices[] = {"inter_matrix", NULL};
static const char *const opt_name_chroma_intra_matrices[] = {"chroma_intra_matrix", NULL};
static const char *const opt_name_max_frame_rates[] = {"fpsmax", NULL};
static const char *const opt_name_max_frames[] = {"frames", "aframes", "vframes", "dframes", NULL};
static const char *const opt_name_max_muxing_queue_size[] = {"max_muxing_queue_size", NULL};
static const char *const opt_name_muxing_queue_data_threshold[] = {"muxing_queue_data_threshold", NULL};
static const char *const opt_name_pass[] = {"pass", NULL};
static const char *const opt_name_passlogfiles[] = {"passlogfile", NULL};
static const char *const opt_name_presets[] = {"pre", "apre", "vpre", "spre", NULL};
static const char *const opt_name_qscale[] = {"q", "qscale", NULL};
static const char *const opt_name_rc_overrides[] = {"rc_override", NULL};
static const char *const opt_name_time_bases[] = {"time_base", NULL};
static const char *const opt_name_audio_channels[] = {"ac", NULL};
static const char *const opt_name_audio_ch_layouts[] = {"channel_layout", "ch_layout", NULL};
static const char *const opt_name_audio_sample_rate[] = {"ar", NULL};
static const char *const opt_name_frame_sizes[] = {"s", NULL};
static const char *const opt_name_frame_pix_fmts[] = {"pix_fmt", NULL};
static const char *const opt_name_sample_fmts[] = {"sample_fmt", NULL};
static int check_opt_bitexact(void *ctx, const AVDictionary *opts,
const char *opt_name, int flag)
{
const AVDictionaryEntry *e = av_dict_get(opts, opt_name, NULL, 0);
if (e) {
const AVOption *o = av_opt_find(ctx, opt_name, NULL, 0, 0);
int val = 0;
if (!o)
return 0;
av_opt_eval_flags(ctx, o, e->value, &val);
return !!(val & flag);
}
return 0;
}
static int choose_encoder(const OptionsContext *o, AVFormatContext *s,
OutputStream *ost, const AVCodec **enc)
{
enum AVMediaType type = ost->st->codecpar->codec_type;
char *codec_name = NULL;
*enc = NULL;
if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, ost->st);
if (!codec_name) {
ost->st->codecpar->codec_id = av_guess_codec(s->oformat, NULL, s->url,
NULL, ost->st->codecpar->codec_type);
*enc = avcodec_find_encoder(ost->st->codecpar->codec_id);
if (!*enc) {
av_log(NULL, AV_LOG_FATAL, "Automatic encoder selection failed for "
"output stream #%d:%d. Default encoder for format %s (codec %s) is "
"probably disabled. Please choose an encoder manually.\n",
ost->file_index, ost->index, s->oformat->name,
avcodec_get_name(ost->st->codecpar->codec_id));
return AVERROR_ENCODER_NOT_FOUND;
}
} else if (strcmp(codec_name, "copy")) {
*enc = find_codec_or_die(codec_name, ost->st->codecpar->codec_type, 1);
ost->st->codecpar->codec_id = (*enc)->id;
}
}
return 0;
}
static char *get_line(AVIOContext *s, AVBPrint *bprint)
{
char c;
while ((c = avio_r8(s)) && c != '\n')
av_bprint_chars(bprint, c, 1);
if (!av_bprint_is_complete(bprint))
report_and_exit(AVERROR(ENOMEM));
return bprint->str;
}
static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
{
int i, ret = -1;
char filename[1000];
char *env_avconv_datadir = getenv_utf8("AVCONV_DATADIR");
char *env_home = getenv_utf8("HOME");
const char *base[3] = { env_avconv_datadir,
env_home,
AVCONV_DATADIR,
};
for (i = 0; i < FF_ARRAY_ELEMS(base) && ret < 0; i++) {
if (!base[i])
continue;
if (codec_name) {
snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
i != 1 ? "" : "/.avconv", codec_name, preset_name);
ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
}
if (ret < 0) {
snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
i != 1 ? "" : "/.avconv", preset_name);
ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
}
}
freeenv_utf8(env_home);
freeenv_utf8(env_avconv_datadir);
return ret;
}
static OutputStream *new_output_stream(Muxer *mux, const OptionsContext *o,
enum AVMediaType type, InputStream *ist)
{
AVFormatContext *oc = mux->fc;
MuxStream *ms;
OutputStream *ost;
const AVCodec *enc;
AVStream *st = avformat_new_stream(oc, NULL);
int idx = oc->nb_streams - 1, ret = 0;
const char *bsfs = NULL, *time_base = NULL;
char *next, *codec_tag = NULL;
double qscale = -1;
int i;
if (!st)
report_and_exit(AVERROR(ENOMEM));
if (oc->nb_streams - 1 < o->nb_streamid_map)
st->id = o->streamid_map[oc->nb_streams - 1];
ms = allocate_array_elem(&mux->of.streams, sizeof(MuxStream),
&mux->of.nb_streams);
ost = &ms->ost;
ms->muxing_queue = av_fifo_alloc2(8, sizeof(AVPacket*), 0);
if (!ms->muxing_queue)
report_and_exit(AVERROR(ENOMEM));
ms->last_mux_dts = AV_NOPTS_VALUE;
ost->file_index = nb_output_files - 1;
ost->index = idx;
ost->st = st;
ost->kf.ref_pts = AV_NOPTS_VALUE;
st->codecpar->codec_type = type;
ret = choose_encoder(o, oc, ost, &enc);
if (ret < 0) {
av_log(NULL, AV_LOG_FATAL, "Error selecting an encoder for stream "
"%d:%d\n", ost->file_index, ost->index);
exit_program(1);
}
if (enc) {
ost->enc_ctx = avcodec_alloc_context3(enc);
if (!ost->enc_ctx)
report_and_exit(AVERROR(ENOMEM));
}
ost->filtered_frame = av_frame_alloc();
if (!ost->filtered_frame)
report_and_exit(AVERROR(ENOMEM));
ost->pkt = av_packet_alloc();
if (!ost->pkt)
report_and_exit(AVERROR(ENOMEM));
if (ost->enc_ctx) {
AVCodecContext *enc = ost->enc_ctx;
AVIOContext *s = NULL;
char *buf = NULL, *arg = NULL, *preset = NULL;
ost->encoder_opts = filter_codec_opts(o->g->codec_opts, enc->codec_id,
oc, st, enc->codec);
MATCH_PER_STREAM_OPT(presets, str, preset, oc, st);
ost->autoscale = 1;
MATCH_PER_STREAM_OPT(autoscale, i, ost->autoscale, oc, st);
if (preset && (!(ret = get_preset_file_2(preset, enc->codec->name, &s)))) {
AVBPrint bprint;
av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
do {
av_bprint_clear(&bprint);
buf = get_line(s, &bprint);
if (!buf[0] || buf[0] == '#')
continue;
if (!(arg = strchr(buf, '='))) {
av_log(NULL, AV_LOG_FATAL, "Invalid line found in the preset file.\n");
exit_program(1);
}
*arg++ = 0;
av_dict_set(&ost->encoder_opts, buf, arg, AV_DICT_DONT_OVERWRITE);
} while (!s->eof_reached);
av_bprint_finalize(&bprint, NULL);
avio_closep(&s);
}
if (ret) {
av_log(NULL, AV_LOG_FATAL,
"Preset %s specified for stream %d:%d, but could not be opened.\n",
preset, ost->file_index, ost->index);
exit_program(1);
}
} else {
ost->encoder_opts = filter_codec_opts(o->g->codec_opts, AV_CODEC_ID_NONE, oc, st, NULL);
}
if (o->bitexact) {
ost->bitexact = 1;
} else if (ost->enc_ctx) {
ost->bitexact = check_opt_bitexact(ost->enc_ctx, ost->encoder_opts, "flags",
AV_CODEC_FLAG_BITEXACT);
}
MATCH_PER_STREAM_OPT(time_bases, str, time_base, oc, st);
if (time_base) {
AVRational q;
if (av_parse_ratio(&q, time_base, INT_MAX, 0, NULL) < 0 ||
q.num <= 0 || q.den <= 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid time base: %s\n", time_base);
exit_program(1);
}
st->time_base = q;
}
MATCH_PER_STREAM_OPT(enc_time_bases, str, time_base, oc, st);
if (time_base) {
AVRational q;
if (av_parse_ratio(&q, time_base, INT_MAX, 0, NULL) < 0 ||
q.den <= 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid time base: %s\n", time_base);
exit_program(1);
}
ost->enc_timebase = q;
}
ms->max_frames = INT64_MAX;
MATCH_PER_STREAM_OPT(max_frames, i64, ms->max_frames, oc, st);
for (i = 0; i<o->nb_max_frames; i++) {
char *p = o->max_frames[i].specifier;
if (!*p && type != AVMEDIA_TYPE_VIDEO) {
av_log(NULL, AV_LOG_WARNING, "Applying unspecific -frames to non video streams, maybe you meant -vframes ?\n");
break;
}
}
ost->copy_prior_start = -1;
MATCH_PER_STREAM_OPT(copy_prior_start, i, ost->copy_prior_start, oc ,st);
MATCH_PER_STREAM_OPT(bitstream_filters, str, bsfs, oc, st);
if (bsfs && *bsfs) {
ret = av_bsf_list_parse_str(bsfs, &ms->bsf_ctx);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error parsing bitstream filter sequence '%s': %s\n", bsfs, av_err2str(ret));
exit_program(1);
}
}
MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, oc, st);
if (codec_tag) {
uint32_t tag = strtol(codec_tag, &next, 0);
if (*next)
tag = AV_RL32(codec_tag);
ost->st->codecpar->codec_tag = tag;
if (ost->enc_ctx)
ost->enc_ctx->codec_tag = tag;
}
MATCH_PER_STREAM_OPT(qscale, dbl, qscale, oc, st);
if (ost->enc_ctx && qscale >= 0) {
ost->enc_ctx->flags |= AV_CODEC_FLAG_QSCALE;
ost->enc_ctx->global_quality = FF_QP2LAMBDA * qscale;
}
ms->max_muxing_queue_size = 128;
MATCH_PER_STREAM_OPT(max_muxing_queue_size, i, ms->max_muxing_queue_size, oc, st);
ms->muxing_queue_data_threshold = 50*1024*1024;
MATCH_PER_STREAM_OPT(muxing_queue_data_threshold, i, ms->muxing_queue_data_threshold, oc, st);
MATCH_PER_STREAM_OPT(bits_per_raw_sample, i, ost->bits_per_raw_sample,
oc, st);
if (oc->oformat->flags & AVFMT_GLOBALHEADER && ost->enc_ctx)
ost->enc_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
av_dict_copy(&ost->sws_dict, o->g->sws_dict, 0);
av_dict_copy(&ost->swr_opts, o->g->swr_opts, 0);
if (ost->enc_ctx && av_get_exact_bits_per_sample(ost->enc_ctx->codec_id) == 24)
av_dict_set(&ost->swr_opts, "output_sample_bits", "24", 0);
if (ist) {
ost->ist = ist;
ost->ist->discard = 0;
ost->ist->st->discard = ost->ist->user_set_discard;
}
ost->last_mux_dts = AV_NOPTS_VALUE;
ost->last_filter_pts = AV_NOPTS_VALUE;
MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i,
ost->copy_initial_nonkeyframes, oc, st);
return ost;
}
static char *get_ost_filters(const OptionsContext *o, AVFormatContext *oc,
OutputStream *ost)
{
AVStream *st = ost->st;
if (ost->filters_script && ost->filters) {
av_log(NULL, AV_LOG_ERROR, "Both -filter and -filter_script set for "
"output stream #%d:%d.\n", nb_output_files, st->index);
exit_program(1);
}
if (ost->filters_script)
return file_read(ost->filters_script);
else if (ost->filters)
return av_strdup(ost->filters);
return av_strdup(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ?
"null" : "anull");
}
static void check_streamcopy_filters(const OptionsContext *o, AVFormatContext *oc,
const OutputStream *ost, enum AVMediaType type)
{
if (ost->filters_script || ost->filters) {
av_log(NULL, AV_LOG_ERROR,
"%s '%s' was defined for %s output stream %d:%d but codec copy was selected.\n"
"Filtering and streamcopy cannot be used together.\n",
ost->filters ? "Filtergraph" : "Filtergraph script",
ost->filters ? ost->filters : ost->filters_script,
av_get_media_type_string(type), ost->file_index, ost->index);
exit_program(1);
}
}
static void parse_matrix_coeffs(uint16_t *dest, const char *str)
{
int i;
const char *p = str;
for (i = 0;; i++) {
dest[i] = atoi(p);
if (i == 63)
break;
p = strchr(p, ',');
if (!p) {
av_log(NULL, AV_LOG_FATAL, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
exit_program(1);
}
p++;
}
}
static OutputStream *new_video_stream(Muxer *mux, const OptionsContext *o, InputStream *ist)
{
AVFormatContext *oc = mux->fc;
AVStream *st;
OutputStream *ost;
char *frame_rate = NULL, *max_frame_rate = NULL, *frame_aspect_ratio = NULL;
ost = new_output_stream(mux, o, AVMEDIA_TYPE_VIDEO, ist);
st = ost->st;
MATCH_PER_STREAM_OPT(frame_rates, str, frame_rate, oc, st);
if (frame_rate && av_parse_video_rate(&ost->frame_rate, frame_rate) < 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid framerate value: %s\n", frame_rate);
exit_program(1);
}
MATCH_PER_STREAM_OPT(max_frame_rates, str, max_frame_rate, oc, st);
if (max_frame_rate && av_parse_video_rate(&ost->max_frame_rate, max_frame_rate) < 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid maximum framerate value: %s\n", max_frame_rate);
exit_program(1);
}
if (frame_rate && max_frame_rate) {
av_log(NULL, AV_LOG_ERROR, "Only one of -fpsmax and -r can be set for a stream.\n");
exit_program(1);
}
if ((frame_rate || max_frame_rate) &&
video_sync_method == VSYNC_PASSTHROUGH)
av_log(NULL, AV_LOG_ERROR, "Using -vsync passthrough and -r/-fpsmax can produce invalid output files\n");
MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
if (frame_aspect_ratio) {
AVRational q;
if (av_parse_ratio(&q, frame_aspect_ratio, 255, 0, NULL) < 0 ||
q.num <= 0 || q.den <= 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid aspect ratio: %s\n", frame_aspect_ratio);
exit_program(1);
}
ost->frame_aspect_ratio = q;
}
MATCH_PER_STREAM_OPT(filter_scripts, str, ost->filters_script, oc, st);
MATCH_PER_STREAM_OPT(filters, str, ost->filters, oc, st);
if (ost->enc_ctx) {
AVCodecContext *video_enc = ost->enc_ctx;
const char *p = NULL, *fps_mode = NULL;
char *frame_size = NULL;
char *frame_pix_fmt = NULL;
char *intra_matrix = NULL, *inter_matrix = NULL;
char *chroma_intra_matrix = NULL;
int do_pass = 0;
int i;
MATCH_PER_STREAM_OPT(frame_sizes, str, frame_size, oc, st);
if (frame_size && av_parse_video_size(&video_enc->width, &video_enc->height, frame_size) < 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid frame size: %s.\n", frame_size);
exit_program(1);
}
MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
if (frame_pix_fmt && *frame_pix_fmt == '+') {
ost->keep_pix_fmt = 1;
if (!*++frame_pix_fmt)
frame_pix_fmt = NULL;
}
if (frame_pix_fmt && (video_enc->pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == AV_PIX_FMT_NONE) {
av_log(NULL, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", frame_pix_fmt);
exit_program(1);
}
st->sample_aspect_ratio = video_enc->sample_aspect_ratio;
MATCH_PER_STREAM_OPT(intra_matrices, str, intra_matrix, oc, st);
if (intra_matrix) {
if (!(video_enc->intra_matrix = av_mallocz(sizeof(*video_enc->intra_matrix) * 64)))
report_and_exit(AVERROR(ENOMEM));
parse_matrix_coeffs(video_enc->intra_matrix, intra_matrix);
}
MATCH_PER_STREAM_OPT(chroma_intra_matrices, str, chroma_intra_matrix, oc, st);
if (chroma_intra_matrix) {
uint16_t *p = av_mallocz(sizeof(*video_enc->chroma_intra_matrix) * 64);
if (!p)
report_and_exit(AVERROR(ENOMEM));
video_enc->chroma_intra_matrix = p;
parse_matrix_coeffs(p, chroma_intra_matrix);
}
MATCH_PER_STREAM_OPT(inter_matrices, str, inter_matrix, oc, st);
if (inter_matrix) {
if (!(video_enc->inter_matrix = av_mallocz(sizeof(*video_enc->inter_matrix) * 64)))
report_and_exit(AVERROR(ENOMEM));
parse_matrix_coeffs(video_enc->inter_matrix, inter_matrix);
}
MATCH_PER_STREAM_OPT(rc_overrides, str, p, oc, st);
for (i = 0; p; i++) {
int start, end, q;
int e = sscanf(p, "%d,%d,%d", &start, &end, &q);
if (e != 3) {
av_log(NULL, AV_LOG_FATAL, "error parsing rc_override\n");
exit_program(1);
}
video_enc->rc_override =
av_realloc_array(video_enc->rc_override,
i + 1, sizeof(RcOverride));
if (!video_enc->rc_override) {
av_log(NULL, AV_LOG_FATAL, "Could not (re)allocate memory for rc_override.\n");
exit_program(1);
}
video_enc->rc_override[i].start_frame = start;
video_enc->rc_override[i].end_frame = end;
if (q > 0) {
video_enc->rc_override[i].qscale = q;
video_enc->rc_override[i].quality_factor = 1.0;
}
else {
video_enc->rc_override[i].qscale = 0;
video_enc->rc_override[i].quality_factor = -q/100.0;
}
p = strchr(p, '/');
if (p) p++;
}
video_enc->rc_override_count = i;
#if FFMPEG_OPT_PSNR
if (do_psnr) {
av_log(NULL, AV_LOG_WARNING, "The -psnr option is deprecated, use -flags +psnr\n");
video_enc->flags|= AV_CODEC_FLAG_PSNR;
}
#endif
/* two pass mode */
MATCH_PER_STREAM_OPT(pass, i, do_pass, oc, st);
if (do_pass) {
if (do_pass & 1) {
video_enc->flags |= AV_CODEC_FLAG_PASS1;
av_dict_set(&ost->encoder_opts, "flags", "+pass1", AV_DICT_APPEND);
}
if (do_pass & 2) {
video_enc->flags |= AV_CODEC_FLAG_PASS2;
av_dict_set(&ost->encoder_opts, "flags", "+pass2", AV_DICT_APPEND);
}
}
MATCH_PER_STREAM_OPT(passlogfiles, str, ost->logfile_prefix, oc, st);
if (ost->logfile_prefix &&
!(ost->logfile_prefix = av_strdup(ost->logfile_prefix)))
report_and_exit(AVERROR(ENOMEM));
if (do_pass) {
int ost_idx = -1;
char logfilename[1024];
FILE *f;
/* compute this stream's global index */
for (int i = 0; i <= ost->file_index; i++)
ost_idx += output_files[i]->nb_streams;
snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
ost->logfile_prefix ? ost->logfile_prefix :
DEFAULT_PASS_LOGFILENAME_PREFIX,
ost_idx);
if (!strcmp(ost->enc_ctx->codec->name, "libx264")) {
av_dict_set(&ost->encoder_opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
} else {
if (video_enc->flags & AV_CODEC_FLAG_PASS2) {
char *logbuffer = file_read(logfilename);
if (!logbuffer) {
av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
logfilename);
exit_program(1);
}
video_enc->stats_in = logbuffer;
}
if (video_enc->flags & AV_CODEC_FLAG_PASS1) {
f = fopen_utf8(logfilename, "wb");
if (!f) {
av_log(NULL, AV_LOG_FATAL,
"Cannot write log file '%s' for pass-1 encoding: %s\n",
logfilename, strerror(errno));
exit_program(1);
}
ost->logfile = f;
}
}
}
MATCH_PER_STREAM_OPT(force_fps, i, ost->force_fps, oc, st);
ost->top_field_first = -1;
MATCH_PER_STREAM_OPT(top_field_first, i, ost->top_field_first, oc, st);
ost->vsync_method = video_sync_method;
MATCH_PER_STREAM_OPT(fps_mode, str, fps_mode, oc, st);
if (fps_mode)
parse_and_set_vsync(fps_mode, &ost->vsync_method, ost->file_index, ost->index, 0);
if (ost->vsync_method == VSYNC_AUTO) {
if (!strcmp(oc->oformat->name, "avi")) {
ost->vsync_method = VSYNC_VFR;
} else {
ost->vsync_method = (oc->oformat->flags & AVFMT_VARIABLE_FPS) ?
((oc->oformat->flags & AVFMT_NOTIMESTAMPS) ?
VSYNC_PASSTHROUGH : VSYNC_VFR) :
VSYNC_CFR;
}
if (ost->ist && ost->vsync_method == VSYNC_CFR) {
const InputFile *ifile = input_files[ost->ist->file_index];
if (ifile->nb_streams == 1 && ifile->input_ts_offset == 0)
ost->vsync_method = VSYNC_VSCFR;
}
if (ost->vsync_method == VSYNC_CFR && copy_ts) {
ost->vsync_method = VSYNC_VSCFR;
}
}
ost->is_cfr = (ost->vsync_method == VSYNC_CFR || ost->vsync_method == VSYNC_VSCFR);
ost->avfilter = get_ost_filters(o, oc, ost);
if (!ost->avfilter)
exit_program(1);
ost->last_frame = av_frame_alloc();
if (!ost->last_frame)
report_and_exit(AVERROR(ENOMEM));
} else
check_streamcopy_filters(o, oc, ost, AVMEDIA_TYPE_VIDEO);
return ost;
}
static OutputStream *new_audio_stream(Muxer *mux, const OptionsContext *o, InputStream *ist)
{
AVFormatContext *oc = mux->fc;
AVStream *st;
OutputStream *ost;
ost = new_output_stream(mux, o, AVMEDIA_TYPE_AUDIO, ist);
st = ost->st;
MATCH_PER_STREAM_OPT(filter_scripts, str, ost->filters_script, oc, st);
MATCH_PER_STREAM_OPT(filters, str, ost->filters, oc, st);
if (ost->enc_ctx) {
AVCodecContext *audio_enc = ost->enc_ctx;
int channels = 0;
char *layout = NULL;
char *sample_fmt = NULL;
MATCH_PER_STREAM_OPT(audio_channels, i, channels, oc, st);
if (channels) {
audio_enc->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
audio_enc->ch_layout.nb_channels = channels;
}
MATCH_PER_STREAM_OPT(audio_ch_layouts, str, layout, oc, st);
if (layout) {
if (av_channel_layout_from_string(&audio_enc->ch_layout, layout) < 0) {
#if FF_API_OLD_CHANNEL_LAYOUT
uint64_t mask;
AV_NOWARN_DEPRECATED({
mask = av_get_channel_layout(layout);
})
if (!mask) {
#endif
av_log(NULL, AV_LOG_FATAL, "Unknown channel layout: %s\n", layout);
exit_program(1);
#if FF_API_OLD_CHANNEL_LAYOUT
}
av_log(NULL, AV_LOG_WARNING, "Channel layout '%s' uses a deprecated syntax.\n",
layout);
av_channel_layout_from_mask(&audio_enc->ch_layout, mask);
#endif
}
}
MATCH_PER_STREAM_OPT(sample_fmts, str, sample_fmt, oc, st);
if (sample_fmt &&
(audio_enc->sample_fmt = av_get_sample_fmt(sample_fmt)) == AV_SAMPLE_FMT_NONE) {
av_log(NULL, AV_LOG_FATAL, "Invalid sample format '%s'\n", sample_fmt);
exit_program(1);
}
MATCH_PER_STREAM_OPT(audio_sample_rate, i, audio_enc->sample_rate, oc, st);
MATCH_PER_STREAM_OPT(apad, str, ost->apad, oc, st);
ost->apad = av_strdup(ost->apad);
ost->avfilter = get_ost_filters(o, oc, ost);
if (!ost->avfilter)
exit_program(1);
#if FFMPEG_OPT_MAP_CHANNEL
/* check for channel mapping for this audio stream */
for (int n = 0; n < o->nb_audio_channel_maps; n++) {
AudioChannelMap *map = &o->audio_channel_maps[n];
if ((map->ofile_idx == -1 || ost->file_index == map->ofile_idx) &&
(map->ostream_idx == -1 || ost->st->index == map->ostream_idx)) {
InputStream *ist;
if (map->channel_idx == -1) {
ist = NULL;
} else if (!ost->ist) {
av_log(NULL, AV_LOG_FATAL, "Cannot determine input stream for channel mapping %d.%d\n",
ost->file_index, ost->st->index);
continue;
} else {
ist = ost->ist;
}
if (!ist || (ist->file_index == map->file_idx && ist->st->index == map->stream_idx)) {
if (av_reallocp_array(&ost->audio_channels_map,
ost->audio_channels_mapped + 1,
sizeof(*ost->audio_channels_map)
) < 0 )
report_and_exit(AVERROR(ENOMEM));
ost->audio_channels_map[ost->audio_channels_mapped++] = map->channel_idx;
}
}
}
#endif
} else
check_streamcopy_filters(o, oc, ost, AVMEDIA_TYPE_AUDIO);
return ost;
}
static OutputStream *new_data_stream(Muxer *mux, const OptionsContext *o, InputStream *ist)
{
OutputStream *ost;
ost = new_output_stream(mux, o, AVMEDIA_TYPE_DATA, ist);
if (ost->enc_ctx) {
av_log(NULL, AV_LOG_FATAL, "Data stream encoding not supported yet (only streamcopy)\n");
exit_program(1);
}
return ost;
}
static OutputStream *new_unknown_stream(Muxer *mux, const OptionsContext *o, InputStream *ist)
{
OutputStream *ost;
ost = new_output_stream(mux, o, AVMEDIA_TYPE_UNKNOWN, ist);
if (ost->enc_ctx) {
av_log(NULL, AV_LOG_FATAL, "Unknown stream encoding not supported yet (only streamcopy)\n");
exit_program(1);
}
return ost;
}
static OutputStream *new_attachment_stream(Muxer *mux, const OptionsContext *o, InputStream *ist)
{
OutputStream *ost = new_output_stream(mux, o, AVMEDIA_TYPE_ATTACHMENT, ist);
ost->finished = 1;
return ost;
}
static OutputStream *new_subtitle_stream(Muxer *mux, const OptionsContext *o, InputStream *ist)
{
AVStream *st;
OutputStream *ost;
ost = new_output_stream(mux, o, AVMEDIA_TYPE_SUBTITLE, ist);
st = ost->st;
if (ost->enc_ctx) {
AVCodecContext *subtitle_enc = ost->enc_ctx;
char *frame_size = NULL;
MATCH_PER_STREAM_OPT(frame_sizes, str, frame_size, mux->fc, st);
if (frame_size && av_parse_video_size(&subtitle_enc->width, &subtitle_enc->height, frame_size) < 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid frame size: %s.\n", frame_size);
exit_program(1);
}
}
return ost;
}
static void init_output_filter(OutputFilter *ofilter, const OptionsContext *o,
Muxer *mux)
{
OutputStream *ost;
switch (ofilter->type) {
case AVMEDIA_TYPE_VIDEO: ost = new_video_stream(mux, o, NULL); break;
case AVMEDIA_TYPE_AUDIO: ost = new_audio_stream(mux, o, NULL); break;
default:
av_log(NULL, AV_LOG_FATAL, "Only video and audio filters are supported "
"currently.\n");
exit_program(1);
}
ost->filter = ofilter;
ofilter->ost = ost;
ofilter->format = -1;
if (!ost->enc_ctx) {
av_log(NULL, AV_LOG_ERROR, "Streamcopy requested for output stream %d:%d, "
"which is fed from a complex filtergraph. Filtering and streamcopy "
"cannot be used together.\n", ost->file_index, ost->index);
exit_program(1);
}
if (ost->avfilter && (ost->filters || ost->filters_script)) {
const char *opt = ost->filters ? "-vf/-af/-filter" : "-filter_script";
av_log(NULL, AV_LOG_ERROR,
"%s '%s' was specified through the %s option "
"for output stream %d:%d, which is fed from a complex filtergraph.\n"
"%s and -filter_complex cannot be used together for the same stream.\n",
ost->filters ? "Filtergraph" : "Filtergraph script",
ost->filters ? ost->filters : ost->filters_script,
opt, ost->file_index, ost->index, opt);
exit_program(1);
}
avfilter_inout_free(&ofilter->out_tmp);
}
static void map_auto_video(Muxer *mux, const OptionsContext *o)
{
AVFormatContext *oc = mux->fc;
InputStream *best_ist = NULL;
int best_score = 0;
int qcr;
/* video: highest resolution */
if (av_guess_codec(oc->oformat, NULL, oc->url, NULL, AVMEDIA_TYPE_VIDEO) == AV_CODEC_ID_NONE)
return;
qcr = avformat_query_codec(oc->oformat, oc->oformat->video_codec, 0);
for (int j = 0; j < nb_input_files; j++) {
InputFile *ifile = input_files[j];
InputStream *file_best_ist = NULL;
int file_best_score = 0;
for (int i = 0; i < ifile->nb_streams; i++) {
InputStream *ist = ifile->streams[i];
int score;
if (ist->user_set_discard == AVDISCARD_ALL ||
ist->st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
continue;
score = ist->st->codecpar->width * ist->st->codecpar->height
+ 100000000 * !!(ist->st->event_flags & AVSTREAM_EVENT_FLAG_NEW_PACKETS)
+ 5000000*!!(ist->st->disposition & AV_DISPOSITION_DEFAULT);
if((qcr!=MKTAG('A', 'P', 'I', 'C')) && (ist->st->disposition & AV_DISPOSITION_ATTACHED_PIC))
score = 1;
if (score > file_best_score) {
if((qcr==MKTAG('A', 'P', 'I', 'C')) && !(ist->st->disposition & AV_DISPOSITION_ATTACHED_PIC))
continue;
file_best_score = score;
file_best_ist = ist;
}
}
if (file_best_ist) {
if((qcr == MKTAG('A', 'P', 'I', 'C')) ||
!(file_best_ist->st->disposition & AV_DISPOSITION_ATTACHED_PIC))
file_best_score -= 5000000*!!(file_best_ist->st->disposition & AV_DISPOSITION_DEFAULT);
if (file_best_score > best_score) {
best_score = file_best_score;
best_ist = file_best_ist;
}
}
}
if (best_ist)
new_video_stream(mux, o, best_ist);
}
static void map_auto_audio(Muxer *mux, const OptionsContext *o)
{
AVFormatContext *oc = mux->fc;
InputStream *best_ist = NULL;
int best_score = 0;
/* audio: most channels */
if (av_guess_codec(oc->oformat, NULL, oc->url, NULL, AVMEDIA_TYPE_AUDIO) == AV_CODEC_ID_NONE)
return;
for (int j = 0; j < nb_input_files; j++) {
InputFile *ifile = input_files[j];
InputStream *file_best_ist = NULL;
int file_best_score = 0;
for (int i = 0; i < ifile->nb_streams; i++) {
InputStream *ist = ifile->streams[i];
int score;
if (ist->user_set_discard == AVDISCARD_ALL ||
ist->st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
continue;
score = ist->st->codecpar->ch_layout.nb_channels
+ 100000000 * !!(ist->st->event_flags & AVSTREAM_EVENT_FLAG_NEW_PACKETS)
+ 5000000*!!(ist->st->disposition & AV_DISPOSITION_DEFAULT);
if (score > file_best_score) {
file_best_score = score;
file_best_ist = ist;
}
}
if (file_best_ist) {
file_best_score -= 5000000*!!(file_best_ist->st->disposition & AV_DISPOSITION_DEFAULT);
if (file_best_score > best_score) {
best_score = file_best_score;
best_ist = file_best_ist;
}
}
}
if (best_ist)
new_audio_stream(mux, o, best_ist);
}
static void map_auto_subtitle(Muxer *mux, const OptionsContext *o)
{
AVFormatContext *oc = mux->fc;
char *subtitle_codec_name = NULL;
/* subtitles: pick first */
MATCH_PER_TYPE_OPT(codec_names, str, subtitle_codec_name, oc, "s");
if (!avcodec_find_encoder(oc->oformat->subtitle_codec) && !subtitle_codec_name)
return;
for (InputStream *ist = ist_iter(NULL); ist; ist = ist_iter(ist))
if (ist->st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
AVCodecDescriptor const *input_descriptor =
avcodec_descriptor_get(ist->st->codecpar->codec_id);
AVCodecDescriptor const *output_descriptor = NULL;
AVCodec const *output_codec =
avcodec_find_encoder(oc->oformat->subtitle_codec);
int input_props = 0, output_props = 0;
if (ist->user_set_discard == AVDISCARD_ALL)
continue;
if (output_codec)
output_descriptor = avcodec_descriptor_get(output_codec->id);
if (input_descriptor)
input_props = input_descriptor->props & (AV_CODEC_PROP_TEXT_SUB | AV_CODEC_PROP_BITMAP_SUB);
if (output_descriptor)
output_props = output_descriptor->props & (AV_CODEC_PROP_TEXT_SUB | AV_CODEC_PROP_BITMAP_SUB);
if (subtitle_codec_name ||
input_props & output_props ||
// Map dvb teletext which has neither property to any output subtitle encoder
input_descriptor && output_descriptor &&
(!input_descriptor->props ||
!output_descriptor->props)) {
new_subtitle_stream(mux, o, ist);
break;
}
}
}
static void map_auto_data(Muxer *mux, const OptionsContext *o)
{
AVFormatContext *oc = mux->fc;
/* Data only if codec id match */
enum AVCodecID codec_id = av_guess_codec(oc->oformat, NULL, oc->url, NULL, AVMEDIA_TYPE_DATA);
if (codec_id == AV_CODEC_ID_NONE)
return;
for (InputStream *ist = ist_iter(NULL); ist; ist = ist_iter(ist)) {
if (ist->user_set_discard == AVDISCARD_ALL)
continue;
if (ist->st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
ist->st->codecpar->codec_id == codec_id )
new_data_stream(mux, o, ist);
}
}
static void map_manual(Muxer *mux, const OptionsContext *o, const StreamMap *map)
{
InputStream *ist;
if (map->disabled)
return;
if (map->linklabel) {
FilterGraph *fg;
OutputFilter *ofilter = NULL;
int j, k;
for (j = 0; j < nb_filtergraphs; j++) {
fg = filtergraphs[j];
for (k = 0; k < fg->nb_outputs; k++) {
AVFilterInOut *out = fg->outputs[k]->out_tmp;
if (out && !strcmp(out->name, map->linklabel)) {
ofilter = fg->outputs[k];
goto loop_end;
}
}
}
loop_end:
if (!ofilter) {
av_log(NULL, AV_LOG_FATAL, "Output with label '%s' does not exist "
"in any defined filter graph, or was already used elsewhere.\n", map->linklabel);
exit_program(1);
}
init_output_filter(ofilter, o, mux);
} else {
ist = input_files[map->file_index]->streams[map->stream_index];
if (ist->user_set_discard == AVDISCARD_ALL) {
av_log(NULL, AV_LOG_FATAL, "Stream #%d:%d is disabled and cannot be mapped.\n",
map->file_index, map->stream_index);
exit_program(1);
}
if(o->subtitle_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
return;
if(o-> audio_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
return;
if(o-> video_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
return;
if(o-> data_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
return;
switch (ist->st->codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO: new_video_stream (mux, o, ist); break;
case AVMEDIA_TYPE_AUDIO: new_audio_stream (mux, o, ist); break;
case AVMEDIA_TYPE_SUBTITLE: new_subtitle_stream (mux, o, ist); break;
case AVMEDIA_TYPE_DATA: new_data_stream (mux, o, ist); break;
case AVMEDIA_TYPE_ATTACHMENT: new_attachment_stream(mux, o, ist); break;
case AVMEDIA_TYPE_UNKNOWN:
if (copy_unknown_streams) {
new_unknown_stream (mux, o, ist);
break;
}
default:
av_log(NULL, ignore_unknown_streams ? AV_LOG_WARNING : AV_LOG_FATAL,
"Cannot map stream #%d:%d - unsupported type.\n",
map->file_index, map->stream_index);
if (!ignore_unknown_streams) {
av_log(NULL, AV_LOG_FATAL,
"If you want unsupported types ignored instead "
"of failing, please use the -ignore_unknown option\n"
"If you want them copied, please use -copy_unknown\n");
exit_program(1);
}
}
}
}
static void of_add_attachments(Muxer *mux, const OptionsContext *o)
{
OutputStream *ost;
int err;
for (int i = 0; i < o->nb_attachments; i++) {
AVIOContext *pb;
uint8_t *attachment;
const char *p;
int64_t len;
if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
av_log(NULL, AV_LOG_FATAL, "Could not open attachment file %s.\n",
o->attachments[i]);
exit_program(1);
}
if ((len = avio_size(pb)) <= 0) {
av_log(NULL, AV_LOG_FATAL, "Could not get size of the attachment %s.\n",
o->attachments[i]);
exit_program(1);
}
if (len > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE ||
!(attachment = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE))) {
av_log(NULL, AV_LOG_FATAL, "Attachment %s too large.\n",
o->attachments[i]);
exit_program(1);
}
avio_read(pb, attachment, len);
memset(attachment + len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
ost = new_attachment_stream(mux, o, NULL);
ost->attachment_filename = o->attachments[i];
ost->st->codecpar->extradata = attachment;
ost->st->codecpar->extradata_size = len;
p = strrchr(o->attachments[i], '/');
av_dict_set(&ost->st->metadata, "filename", (p && *p) ? p + 1 : o->attachments[i], AV_DICT_DONT_OVERWRITE);
avio_closep(&pb);
}
}
static void create_streams(Muxer *mux, const OptionsContext *o)
{
AVFormatContext *oc = mux->fc;
int auto_disable_v = o->video_disable;
int auto_disable_a = o->audio_disable;
int auto_disable_s = o->subtitle_disable;
int auto_disable_d = o->data_disable;
/* create streams for all unlabeled output pads */
for (int i = 0; i < nb_filtergraphs; i++) {
FilterGraph *fg = filtergraphs[i];
for (int j = 0; j < fg->nb_outputs; j++) {
OutputFilter *ofilter = fg->outputs[j];
if (!ofilter->out_tmp || ofilter->out_tmp->name)
continue;
switch (ofilter->type) {
case AVMEDIA_TYPE_VIDEO: auto_disable_v = 1; break;
case AVMEDIA_TYPE_AUDIO: auto_disable_a = 1; break;
case AVMEDIA_TYPE_SUBTITLE: auto_disable_s = 1; break;
}
init_output_filter(ofilter, o, mux);
}
}
if (!o->nb_stream_maps) {
/* pick the "best" stream of each type */
if (!auto_disable_v)
map_auto_video(mux, o);
if (!auto_disable_a)
map_auto_audio(mux, o);
if (!auto_disable_s)
map_auto_subtitle(mux, o);
if (!auto_disable_d)
map_auto_data(mux, o);
} else {
for (int i = 0; i < o->nb_stream_maps; i++)
map_manual(mux, o, &o->stream_maps[i]);
}
of_add_attachments(mux, o);
if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
av_dump_format(oc, nb_output_files - 1, oc->url, 1);
av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", nb_output_files - 1);
exit_program(1);
}
}
static int setup_sync_queues(Muxer *mux, AVFormatContext *oc, int64_t buf_size_us)
{
OutputFile *of = &mux->of;
int nb_av_enc = 0, nb_interleaved = 0;
int limit_frames = 0, limit_frames_av_enc = 0;
#define IS_AV_ENC(ost, type) \
(ost->enc_ctx && (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO))
#define IS_INTERLEAVED(type) (type != AVMEDIA_TYPE_ATTACHMENT)
for (int i = 0; i < oc->nb_streams; i++) {
OutputStream *ost = of->streams[i];
MuxStream *ms = ms_from_ost(ost);
enum AVMediaType type = ost->st->codecpar->codec_type;
ost->sq_idx_encode = -1;
ost->sq_idx_mux = -1;
nb_interleaved += IS_INTERLEAVED(type);
nb_av_enc += IS_AV_ENC(ost, type);
limit_frames |= ms->max_frames < INT64_MAX;
limit_frames_av_enc |= (ms->max_frames < INT64_MAX) && IS_AV_ENC(ost, type);
}
if (!((nb_interleaved > 1 && of->shortest) ||
(nb_interleaved > 0 && limit_frames)))
return 0;
/* if we have more than one encoded audio/video streams, or at least
* one encoded audio/video stream is frame-limited, then we
* synchronize them before encoding */
if ((of->shortest && nb_av_enc > 1) || limit_frames_av_enc) {
of->sq_encode = sq_alloc(SYNC_QUEUE_FRAMES, buf_size_us);
if (!of->sq_encode)
return AVERROR(ENOMEM);
for (int i = 0; i < oc->nb_streams; i++) {
OutputStream *ost = of->streams[i];
MuxStream *ms = ms_from_ost(ost);
enum AVMediaType type = ost->st->codecpar->codec_type;
if (!IS_AV_ENC(ost, type))
continue;
ost->sq_idx_encode = sq_add_stream(of->sq_encode,
of->shortest || ms->max_frames < INT64_MAX);
if (ost->sq_idx_encode < 0)
return ost->sq_idx_encode;
ost->sq_frame = av_frame_alloc();
if (!ost->sq_frame)
return AVERROR(ENOMEM);
if (ms->max_frames != INT64_MAX)
sq_limit_frames(of->sq_encode, ost->sq_idx_encode, ms->max_frames);
}
}
/* if there are any additional interleaved streams, then ALL the streams
* are also synchronized before sending them to the muxer */
if (nb_interleaved > nb_av_enc) {
mux->sq_mux = sq_alloc(SYNC_QUEUE_PACKETS, buf_size_us);
if (!mux->sq_mux)
return AVERROR(ENOMEM);
mux->sq_pkt = av_packet_alloc();
if (!mux->sq_pkt)
return AVERROR(ENOMEM);
for (int i = 0; i < oc->nb_streams; i++) {
OutputStream *ost = of->streams[i];
MuxStream *ms = ms_from_ost(ost);
enum AVMediaType type = ost->st->codecpar->codec_type;
if (!IS_INTERLEAVED(type))
continue;
ost->sq_idx_mux = sq_add_stream(mux->sq_mux,
of->shortest || ms->max_frames < INT64_MAX);
if (ost->sq_idx_mux < 0)
return ost->sq_idx_mux;
if (ms->max_frames != INT64_MAX)
sq_limit_frames(mux->sq_mux, ost->sq_idx_mux, ms->max_frames);
}
}
#undef IS_AV_ENC
#undef IS_INTERLEAVED
return 0;
}
static void of_add_programs(AVFormatContext *oc, const OptionsContext *o)
{
/* process manually set programs */
for (int i = 0; i < o->nb_program; i++) {
const char *p = o->program[i].u.str;
int progid = i+1;
AVProgram *program;
while(*p) {
const char *p2 = av_get_token(&p, ":");
const char *to_dealloc = p2;
char *key;
if (!p2)
break;
if(*p) p++;
key = av_get_token(&p2, "=");
if (!key || !*p2) {
av_freep(&to_dealloc);
av_freep(&key);
break;
}
p2++;
if (!strcmp(key, "program_num"))
progid = strtol(p2, NULL, 0);
av_freep(&to_dealloc);
av_freep(&key);
}
program = av_new_program(oc, progid);
if (!program)
report_and_exit(AVERROR(ENOMEM));
p = o->program[i].u.str;
while(*p) {
const char *p2 = av_get_token(&p, ":");
const char *to_dealloc = p2;
char *key;
if (!p2)
break;
if(*p) p++;
key = av_get_token(&p2, "=");
if (!key) {
av_log(NULL, AV_LOG_FATAL,
"No '=' character in program string %s.\n",
p2);
exit_program(1);
}
if (!*p2)
exit_program(1);
p2++;
if (!strcmp(key, "title")) {
av_dict_set(&program->metadata, "title", p2, 0);
} else if (!strcmp(key, "program_num")) {
} else if (!strcmp(key, "st")) {
int st_num = strtol(p2, NULL, 0);
av_program_add_stream_index(oc, progid, st_num);
} else {
av_log(NULL, AV_LOG_FATAL, "Unknown program key %s.\n", key);
exit_program(1);
}
av_freep(&to_dealloc);
av_freep(&key);
}
}
}
/**
* Parse a metadata specifier passed as 'arg' parameter.
* @param arg metadata string to parse
* @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
* @param index for type c/p, chapter/program index is written here
* @param stream_spec for type s, the stream specifier is written here
*/
static void parse_meta_type(const char *arg, char *type, int *index, const char **stream_spec)
{
if (*arg) {
*type = *arg;
switch (*arg) {
case 'g':
break;
case 's':
if (*(++arg) && *arg != ':') {
av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
exit_program(1);
}
*stream_spec = *arg == ':' ? arg + 1 : "";
break;
case 'c':
case 'p':
if (*(++arg) == ':')
*index = strtol(++arg, NULL, 0);
break;
default:
av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
exit_program(1);
}
} else
*type = 'g';
}
static void of_add_metadata(OutputFile *of, AVFormatContext *oc,
const OptionsContext *o)
{
for (int i = 0; i < o->nb_metadata; i++) {
AVDictionary **m;
char type, *val;
const char *stream_spec;
int index = 0, ret = 0;
val = strchr(o->metadata[i].u.str, '=');
if (!val) {
av_log(NULL, AV_LOG_FATAL, "No '=' character in metadata string %s.\n",
o->metadata[i].u.str);
exit_program(1);
}
*val++ = 0;
parse_meta_type(o->metadata[i].specifier, &type, &index, &stream_spec);
if (type == 's') {
for (int j = 0; j < oc->nb_streams; j++) {
OutputStream *ost = of->streams[j];
if ((ret = check_stream_specifier(oc, oc->streams[j], stream_spec)) > 0) {
#if FFMPEG_ROTATION_METADATA
if (!strcmp(o->metadata[i].u.str, "rotate")) {
char *tail;
double theta = av_strtod(val, &tail);
if (!*tail) {
ost->rotate_overridden = 1;
ost->rotate_override_value = theta;
}
av_log(NULL, AV_LOG_WARNING,
"Conversion of a 'rotate' metadata key to a "
"proper display matrix rotation is deprecated. "
"See -display_rotation for setting rotation "
"instead.");
} else {
#endif
av_dict_set(&oc->streams[j]->metadata, o->metadata[i].u.str, *val ? val : NULL, 0);
#if FFMPEG_ROTATION_METADATA
}
#endif
} else if (ret < 0)
exit_program(1);
}
} else {
switch (type) {
case 'g':
m = &oc->metadata;
break;
case 'c':
if (index < 0 || index >= oc->nb_chapters) {
av_log(NULL, AV_LOG_FATAL, "Invalid chapter index %d in metadata specifier.\n", index);
exit_program(1);
}
m = &oc->chapters[index]->metadata;
break;
case 'p':
if (index < 0 || index >= oc->nb_programs) {
av_log(NULL, AV_LOG_FATAL, "Invalid program index %d in metadata specifier.\n", index);
exit_program(1);
}
m = &oc->programs[index]->metadata;
break;
default:
av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", o->metadata[i].specifier);
exit_program(1);
}
av_dict_set(m, o->metadata[i].u.str, *val ? val : NULL, 0);
}
}
}
static void set_channel_layout(OutputFilter *f, OutputStream *ost)
{
const AVCodec *c = ost->enc_ctx->codec;
int i, err;
if (ost->enc_ctx->ch_layout.order != AV_CHANNEL_ORDER_UNSPEC) {
/* Pass the layout through for all orders but UNSPEC */
err = av_channel_layout_copy(&f->ch_layout, &ost->enc_ctx->ch_layout);
if (err < 0)
report_and_exit(AVERROR(ENOMEM));
return;
}
/* Requested layout is of order UNSPEC */
if (!c->ch_layouts) {
/* Use the default native layout for the requested amount of channels when the
encoder doesn't have a list of supported layouts */
av_channel_layout_default(&f->ch_layout, ost->enc_ctx->ch_layout.nb_channels);
return;
}
/* Encoder has a list of supported layouts. Pick the first layout in it with the
same amount of channels as the requested layout */
for (i = 0; c->ch_layouts[i].nb_channels; i++) {
if (c->ch_layouts[i].nb_channels == ost->enc_ctx->ch_layout.nb_channels)
break;
}
if (c->ch_layouts[i].nb_channels) {
/* Use it if one is found */
err = av_channel_layout_copy(&f->ch_layout, &c->ch_layouts[i]);
if (err < 0)
report_and_exit(AVERROR(ENOMEM));
return;
}
/* If no layout for the amount of channels requested was found, use the default
native layout for it. */
av_channel_layout_default(&f->ch_layout, ost->enc_ctx->ch_layout.nb_channels);
}
static int copy_chapters(InputFile *ifile, OutputFile *ofile, AVFormatContext *os,
int copy_metadata)
{
AVFormatContext *is = ifile->ctx;
AVChapter **tmp;
int i;
tmp = av_realloc_f(os->chapters, is->nb_chapters + os->nb_chapters, sizeof(*os->chapters));
if (!tmp)
return AVERROR(ENOMEM);
os->chapters = tmp;
for (i = 0; i < is->nb_chapters; i++) {
AVChapter *in_ch = is->chapters[i], *out_ch;
int64_t start_time = (ofile->start_time == AV_NOPTS_VALUE) ? 0 : ofile->start_time;
int64_t ts_off = av_rescale_q(start_time - ifile->ts_offset,
AV_TIME_BASE_Q, in_ch->time_base);
int64_t rt = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base);
if (in_ch->end < ts_off)
continue;
if (rt != INT64_MAX && in_ch->start > rt + ts_off)
break;
out_ch = av_mallocz(sizeof(AVChapter));
if (!out_ch)
return AVERROR(ENOMEM);
out_ch->id = in_ch->id;
out_ch->time_base = in_ch->time_base;
out_ch->start = FFMAX(0, in_ch->start - ts_off);
out_ch->end = FFMIN(rt, in_ch->end - ts_off);
if (copy_metadata)
av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);
os->chapters[os->nb_chapters++] = out_ch;
}
return 0;
}
static int copy_metadata(const char *outspec, const char *inspec,
AVFormatContext *oc, AVFormatContext *ic,
int *metadata_global_manual, int *metadata_streams_manual,
int *metadata_chapters_manual, const OptionsContext *o)
{
AVDictionary **meta_in = NULL;
AVDictionary **meta_out = NULL;
int i, ret = 0;
char type_in, type_out;
const char *istream_spec = NULL, *ostream_spec = NULL;
int idx_in = 0, idx_out = 0;
parse_meta_type(inspec, &type_in, &idx_in, &istream_spec);
parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
if (type_in == 'g' || type_out == 'g')
*metadata_global_manual = 1;
if (type_in == 's' || type_out == 's')
*metadata_streams_manual = 1;
if (type_in == 'c' || type_out == 'c')
*metadata_chapters_manual = 1;
/* ic is NULL when just disabling automatic mappings */
if (!ic)
return 0;
#define METADATA_CHECK_INDEX(index, nb_elems, desc)\
if ((index) < 0 || (index) >= (nb_elems)) {\
av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
(desc), (index));\
exit_program(1);\
}
#define SET_DICT(type, meta, context, index)\
switch (type) {\
case 'g':\
meta = &context->metadata;\
break;\
case 'c':\
METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
meta = &context->chapters[index]->metadata;\
break;\
case 'p':\
METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
meta = &context->programs[index]->metadata;\
break;\
case 's':\
break; /* handled separately below */ \
default: av_assert0(0);\
}\
SET_DICT(type_in, meta_in, ic, idx_in);
SET_DICT(type_out, meta_out, oc, idx_out);
/* for input streams choose first matching stream */
if (type_in == 's') {
for (i = 0; i < ic->nb_streams; i++) {
if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
meta_in = &ic->streams[i]->metadata;
break;
} else if (ret < 0)
exit_program(1);
}
if (!meta_in) {
av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match any streams.\n", istream_spec);
exit_program(1);
}
}
if (type_out == 's') {
for (i = 0; i < oc->nb_streams; i++) {
if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
meta_out = &oc->streams[i]->metadata;
av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
} else if (ret < 0)
exit_program(1);
}
} else
av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
return 0;
}
static void copy_meta(Muxer *mux, const OptionsContext *o)
{
OutputFile *of = &mux->of;
AVFormatContext *oc = mux->fc;
int chapters_input_file = o->chapters_input_file;
int metadata_global_manual = 0;
int metadata_streams_manual = 0;
int metadata_chapters_manual = 0;
/* copy metadata */
for (int i = 0; i < o->nb_metadata_map; i++) {
char *p;
int in_file_index = strtol(o->metadata_map[i].u.str, &p, 0);
if (in_file_index >= nb_input_files) {
av_log(NULL, AV_LOG_FATAL, "Invalid input file index %d while processing metadata maps\n", in_file_index);
exit_program(1);
}
copy_metadata(o->metadata_map[i].specifier, *p ? p + 1 : p, oc,
in_file_index >= 0 ?
input_files[in_file_index]->ctx : NULL,
&metadata_global_manual, &metadata_streams_manual,
&metadata_chapters_manual, o);
}
/* copy chapters */
if (chapters_input_file >= nb_input_files) {
if (chapters_input_file == INT_MAX) {
/* copy chapters from the first input file that has them*/
chapters_input_file = -1;
for (int i = 0; i < nb_input_files; i++)
if (input_files[i]->ctx->nb_chapters) {
chapters_input_file = i;
break;
}
} else {
av_log(NULL, AV_LOG_FATAL, "Invalid input file index %d in chapter mapping.\n",
chapters_input_file);
exit_program(1);
}
}
if (chapters_input_file >= 0)
copy_chapters(input_files[chapters_input_file], of, oc,
!metadata_chapters_manual);
/* copy global metadata by default */
if (!metadata_global_manual && nb_input_files){
av_dict_copy(&oc->metadata, input_files[0]->ctx->metadata,
AV_DICT_DONT_OVERWRITE);
if (of->recording_time != INT64_MAX)
av_dict_set(&oc->metadata, "duration", NULL, 0);
av_dict_set(&oc->metadata, "creation_time", NULL, 0);
av_dict_set(&oc->metadata, "company_name", NULL, 0);
av_dict_set(&oc->metadata, "product_name", NULL, 0);
av_dict_set(&oc->metadata, "product_version", NULL, 0);
}
if (!metadata_streams_manual)
for (int i = 0; i < of->nb_streams; i++) {
OutputStream *ost = of->streams[i];
if (!ost->ist) /* this is true e.g. for attached files */
continue;
av_dict_copy(&ost->st->metadata, ost->ist->st->metadata, AV_DICT_DONT_OVERWRITE);
if (ost->enc_ctx) {
av_dict_set(&ost->st->metadata, "encoder", NULL, 0);
}
}
}
static int set_dispositions(Muxer *mux, const OptionsContext *o)
{
OutputFile *of = &mux->of;
AVFormatContext *ctx = mux->fc;
int nb_streams[AVMEDIA_TYPE_NB] = { 0 };
int have_default[AVMEDIA_TYPE_NB] = { 0 };
int have_manual = 0;
int ret = 0;
const char **dispositions;
dispositions = av_calloc(ctx->nb_streams, sizeof(*dispositions));
if (!dispositions)
return AVERROR(ENOMEM);
// first, copy the input dispositions
for (int i = 0; i < ctx->nb_streams; i++) {
OutputStream *ost = of->streams[i];
nb_streams[ost->st->codecpar->codec_type]++;
MATCH_PER_STREAM_OPT(disposition, str, dispositions[i], ctx, ost->st);
have_manual |= !!dispositions[i];
if (ost->ist) {
ost->st->disposition = ost->ist->st->disposition;
if (ost->st->disposition & AV_DISPOSITION_DEFAULT)
have_default[ost->st->codecpar->codec_type] = 1;
}
}
if (have_manual) {
// process manually set dispositions - they override the above copy
for (int i = 0; i < ctx->nb_streams; i++) {
OutputStream *ost = of->streams[i];
const char *disp = dispositions[i];
if (!disp)
continue;
#if LIBAVFORMAT_VERSION_MAJOR >= 60
ret = av_opt_set(ost->st, "disposition", disp, 0);
#else
{
const AVClass *class = av_stream_get_class();
const AVOption *o = av_opt_find(&class, "disposition", NULL, 0, AV_OPT_SEARCH_FAKE_OBJ);
av_assert0(o);
ret = av_opt_eval_flags(&class, o, disp, &ost->st->disposition);
}
#endif
if (ret < 0)
goto finish;
}
} else {
// For each media type with more than one stream, find a suitable stream to
// mark as default, unless one is already marked default.
// "Suitable" means the first of that type, skipping attached pictures.
for (int i = 0; i < ctx->nb_streams; i++) {
OutputStream *ost = of->streams[i];
enum AVMediaType type = ost->st->codecpar->codec_type;
if (nb_streams[type] < 2 || have_default[type] ||
ost->st->disposition & AV_DISPOSITION_ATTACHED_PIC)
continue;
ost->st->disposition |= AV_DISPOSITION_DEFAULT;
have_default[type] = 1;
}
}
finish:
av_freep(&dispositions);
return ret;
}
const char *const forced_keyframes_const_names[] = {
"n",
"n_forced",
"prev_forced_n",
"prev_forced_t",
"t",
NULL
};
static int compare_int64(const void *a, const void *b)
{
return FFDIFFSIGN(*(const int64_t *)a, *(const int64_t *)b);
}
static void parse_forced_key_frames(KeyframeForceCtx *kf, const Muxer *mux,
const char *spec)
{
const char *p;
int n = 1, i, size, index = 0;
int64_t t, *pts;
for (p = spec; *p; p++)
if (*p == ',')
n++;
size = n;
pts = av_malloc_array(size, sizeof(*pts));
if (!pts)
report_and_exit(AVERROR(ENOMEM));
p = spec;
for (i = 0; i < n; i++) {
char *next = strchr(p, ',');
if (next)
*next++ = 0;
if (!memcmp(p, "chapters", 8)) {
AVChapter * const *ch = mux->fc->chapters;
unsigned int nb_ch = mux->fc->nb_chapters;
int j;
if (nb_ch > INT_MAX - size ||
!(pts = av_realloc_f(pts, size += nb_ch - 1,
sizeof(*pts))))
report_and_exit(AVERROR(ENOMEM));
t = p[8] ? parse_time_or_die("force_key_frames", p + 8, 1) : 0;
for (j = 0; j < nb_ch; j++) {
const AVChapter *c = ch[j];
av_assert1(index < size);
pts[index++] = av_rescale_q(c->start, c->time_base,
AV_TIME_BASE_Q) + t;
}
} else {
av_assert1(index < size);
pts[index++] = parse_time_or_die("force_key_frames", p, 1);
}
p = next;
}
av_assert0(index == size);
qsort(pts, size, sizeof(*pts), compare_int64);
kf->nb_pts = size;
kf->pts = pts;
}
static int process_forced_keyframes(Muxer *mux, const OptionsContext *o)
{
for (int i = 0; i < mux->of.nb_streams; i++) {
OutputStream *ost = mux->of.streams[i];
const char *forced_keyframes = NULL;
MATCH_PER_STREAM_OPT(forced_key_frames, str, forced_keyframes, mux->fc, ost->st);
if (!(ost->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
ost->enc_ctx && forced_keyframes))
continue;
if (!strncmp(forced_keyframes, "expr:", 5)) {
int ret = av_expr_parse(&ost->kf.pexpr, forced_keyframes + 5,
forced_keyframes_const_names, NULL, NULL, NULL, NULL, 0, NULL);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR,
"Invalid force_key_frames expression '%s'\n", forced_keyframes + 5);
return ret;
}
ost->kf.expr_const_values[FKF_N] = 0;
ost->kf.expr_const_values[FKF_N_FORCED] = 0;
ost->kf.expr_const_values[FKF_PREV_FORCED_N] = NAN;
ost->kf.expr_const_values[FKF_PREV_FORCED_T] = NAN;
// Don't parse the 'forced_keyframes' in case of 'keep-source-keyframes',
// parse it only for static kf timings
} else if (!strcmp(forced_keyframes, "source")) {
ost->kf.type = KF_FORCE_SOURCE;
} else if (!strcmp(forced_keyframes, "source_no_drop")) {
ost->kf.type = KF_FORCE_SOURCE_NO_DROP;
} else {
parse_forced_key_frames(&ost->kf, mux, forced_keyframes);
}
}
return 0;
}
static void validate_enc_avopt(const Muxer *mux, const AVDictionary *codec_avopt)
{
const AVClass *class = avcodec_get_class();
const AVClass *fclass = avformat_get_class();
const OutputFile *of = &mux->of;
AVDictionary *unused_opts;
const AVDictionaryEntry *e;
unused_opts = strip_specifiers(codec_avopt);
for (int i = 0; i < of->nb_streams; i++) {
e = NULL;
while ((e = av_dict_iterate(of->streams[i]->encoder_opts, e)))
av_dict_set(&unused_opts, e->key, NULL, 0);
}
e = NULL;
while ((e = av_dict_iterate(unused_opts, e))) {
const AVOption *option = av_opt_find(&class, e->key, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ);
const AVOption *foption = av_opt_find(&fclass, e->key, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ);
if (!option || foption)
continue;
if (!(option->flags & AV_OPT_FLAG_ENCODING_PARAM)) {
av_log(NULL, AV_LOG_ERROR, "Codec AVOption %s (%s) specified for "
"output file #%d (%s) is not an encoding option.\n", e->key,
option->help ? option->help : "", nb_output_files - 1,
mux->fc->url);
exit_program(1);
}
// gop_timecode is injected by generic code but not always used
if (!strcmp(e->key, "gop_timecode"))
continue;
av_log(NULL, AV_LOG_WARNING, "Codec AVOption %s (%s) specified for "
"output file #%d (%s) has not been used for any stream. The most "
"likely reason is either wrong type (e.g. a video option with "
"no video streams) or that it is a private option of some encoder "
"which was not actually used for any stream.\n", e->key,
option->help ? option->help : "", nb_output_files - 1, mux->fc->url);
}
av_dict_free(&unused_opts);
}
int of_open(const OptionsContext *o, const char *filename)
{
Muxer *mux;
AVFormatContext *oc;
int err;
OutputFile *of;
int64_t recording_time = o->recording_time;
int64_t stop_time = o->stop_time;
if (stop_time != INT64_MAX && recording_time != INT64_MAX) {
stop_time = INT64_MAX;
av_log(NULL, AV_LOG_WARNING, "-t and -to cannot be used together; using -t.\n");
}
if (stop_time != INT64_MAX && recording_time == INT64_MAX) {
int64_t start_time = o->start_time == AV_NOPTS_VALUE ? 0 : o->start_time;
if (stop_time <= start_time) {
av_log(NULL, AV_LOG_ERROR, "-to value smaller than -ss; aborting.\n");
exit_program(1);
} else {
recording_time = stop_time - start_time;
}
}
mux = allocate_array_elem(&output_files, sizeof(Muxer), &nb_output_files);
of = &mux->of;
of->index = nb_output_files - 1;
of->recording_time = recording_time;
of->start_time = o->start_time;
of->shortest = o->shortest;
mux->thread_queue_size = o->thread_queue_size > 0 ? o->thread_queue_size : 8;
mux->limit_filesize = o->limit_filesize;
av_dict_copy(&mux->opts, o->g->format_opts, 0);
if (!strcmp(filename, "-"))
filename = "pipe:";
err = avformat_alloc_output_context2(&oc, NULL, o->format, filename);
if (!oc) {
print_error(filename, err);
exit_program(1);
}
mux->fc = oc;
if (strcmp(oc->oformat->name, "rtp"))
want_sdp = 0;
of->format = oc->oformat;
if (recording_time != INT64_MAX)
oc->duration = recording_time;
oc->interrupt_callback = int_cb;
if (o->bitexact) {
oc->flags |= AVFMT_FLAG_BITEXACT;
of->bitexact = 1;
} else {
of->bitexact = check_opt_bitexact(oc, mux->opts, "fflags",
AVFMT_FLAG_BITEXACT);
}
/* create all output streams for this file */
create_streams(mux, o);
/* check if all codec options have been used */
validate_enc_avopt(mux, o->g->codec_opts);
/* set the decoding_needed flags and create simple filtergraphs */
for (int i = 0; i < of->nb_streams; i++) {
OutputStream *ost = of->streams[i];
if (ost->enc_ctx && ost->ist) {
InputStream *ist = ost->ist;
ist->decoding_needed |= DECODING_FOR_OST;
ist->processing_needed = 1;
if (ost->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
ost->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
err = init_simple_filtergraph(ist, ost);
if (err < 0) {
av_log(NULL, AV_LOG_ERROR,
"Error initializing a simple filtergraph between streams "
"%d:%d->%d:%d\n", ist->file_index, ist->st->index,
nb_output_files - 1, ost->st->index);
exit_program(1);
}
}
} else if (ost->ist) {
ost->ist->processing_needed = 1;
}
/* set the filter output constraints */
if (ost->filter) {
const AVCodec *c = ost->enc_ctx->codec;
OutputFilter *f = ost->filter;
switch (ost->enc_ctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
f->frame_rate = ost->frame_rate;
f->width = ost->enc_ctx->width;
f->height = ost->enc_ctx->height;
if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
f->format = ost->enc_ctx->pix_fmt;
} else {
f->formats = c->pix_fmts;
}
break;
case AVMEDIA_TYPE_AUDIO:
if (ost->enc_ctx->sample_fmt != AV_SAMPLE_FMT_NONE) {
f->format = ost->enc_ctx->sample_fmt;
} else {
f->formats = c->sample_fmts;
}
if (ost->enc_ctx->sample_rate) {
f->sample_rate = ost->enc_ctx->sample_rate;
} else {
f->sample_rates = c->supported_samplerates;
}
if (ost->enc_ctx->ch_layout.nb_channels) {
set_channel_layout(f, ost);
} else if (c->ch_layouts) {
f->ch_layouts = c->ch_layouts;
}
break;
}
}
}
/* check filename in case of an image number is expected */
if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
if (!av_filename_number_test(oc->url)) {
print_error(oc->url, AVERROR(EINVAL));
exit_program(1);
}
}
if (!(oc->oformat->flags & AVFMT_NOFILE)) {
/* test if it already exists to avoid losing precious files */
assert_file_overwrite(filename);
/* open the file */
if ((err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
&oc->interrupt_callback,
&mux->opts)) < 0) {
print_error(filename, err);
exit_program(1);
}
} else if (strcmp(oc->oformat->name, "image2")==0 && !av_filename_number_test(filename))
assert_file_overwrite(filename);
if (o->mux_preload) {
av_dict_set_int(&mux->opts, "preload", o->mux_preload*AV_TIME_BASE, 0);
}
oc->max_delay = (int)(o->mux_max_delay * AV_TIME_BASE);
/* copy metadata and chapters from input files */
copy_meta(mux, o);
of_add_programs(oc, o);
of_add_metadata(of, oc, o);
err = set_dispositions(mux, o);
if (err < 0) {
av_log(NULL, AV_LOG_FATAL, "Error setting output stream dispositions\n");
exit_program(1);
}
// parse forced keyframe specifications;
// must be done after chapters are created
err = process_forced_keyframes(mux, o);
if (err < 0) {
av_log(NULL, AV_LOG_FATAL, "Error processing forced keyframes\n");
exit_program(1);
}
err = setup_sync_queues(mux, oc, o->shortest_buf_duration * AV_TIME_BASE);
if (err < 0) {
av_log(NULL, AV_LOG_FATAL, "Error setting up output sync queues\n");
exit_program(1);
}
of->url = filename;
/* write the header for files with no streams */
if (of->format->flags & AVFMT_NOSTREAMS && oc->nb_streams == 0) {
int ret = mux_check_init(mux);
if (ret < 0)
return ret;
}
return 0;
}
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