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avconv: refactor selecting an encoder

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Fail immediately if automatic encoder selection failed. Always set the
stream_copy/encoding_needed flags in one place.
This commit is contained in:
Anton Khirnov 2016-05-23 07:38:58 +02:00
parent 5e1840622c
commit 90944ee3ab
2 changed files with 37 additions and 25 deletions
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11
avconv.c
View File

@ -1949,17 +1949,6 @@ static int transcode_init(void)
AVCodecContext *enc_ctx = ost->enc_ctx;
AVCodecContext *dec_ctx = NULL;
if (!ost->enc) {
/* should only happen when a default codec is not present. */
snprintf(error, sizeof(error), "Automatic encoder selection "
"failed for output stream #%d:%d. Default encoder for "
"format %s is probably disabled. Please choose an "
"encoder manually.\n", ost->file_index, ost->index,
oc->oformat->name);
ret = AVERROR(EINVAL);
goto dump_format;
}
set_encoder_id(output_files[ost->file_index], ost);
if (ist) {

51
avconv_opt.c
View File

@ -919,21 +919,39 @@ static int get_preset_file_2(const char *preset_name, const char *codec_name, AV
return ret;
}
static void choose_encoder(OptionsContext *o, AVFormatContext *s, OutputStream *ost)
static int choose_encoder(OptionsContext *o, AVFormatContext *s, OutputStream *ost)
{
enum AVMediaType type = ost->st->codecpar->codec_type;
char *codec_name = NULL;
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->filename,
NULL, ost->st->codecpar->codec_type);
ost->enc = avcodec_find_encoder(ost->st->codecpar->codec_id);
} else if (!strcmp(codec_name, "copy"))
ost->stream_copy = 1;
else {
ost->enc = find_codec_or_die(codec_name, ost->st->codecpar->codec_type, 1);
ost->st->codecpar->codec_id = ost->enc->id;
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->filename,
NULL, ost->st->codecpar->codec_type);
ost->enc = avcodec_find_encoder(ost->st->codecpar->codec_id);
if (!ost->enc) {
av_log(NULL, AV_LOG_FATAL, "Automatic encoder selection failed for "
"output stream #%d:%d. Default encoder for format %s is "
"probably disabled. Please choose an encoder manually.\n",
ost->file_index, ost->index, s->oformat->name);
return AVERROR_ENCODER_NOT_FOUND;
}
} else if (!strcmp(codec_name, "copy"))
ost->stream_copy = 1;
else {
ost->enc = find_codec_or_die(codec_name, ost->st->codecpar->codec_type, 1);
ost->st->codecpar->codec_id = ost->enc->id;
}
ost->encoding_needed = !ost->stream_copy;
} else {
/* no encoding supported for other media types */
ost->stream_copy = 1;
ost->encoding_needed = 0;
}
return 0;
}
static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, enum AVMediaType type)
@ -962,7 +980,13 @@ static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, e
ost->index = idx;
ost->st = st;
st->codecpar->codec_type = type;
choose_encoder(o, oc, ost);
ret = choose_encoder(o, oc, ost);
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);
}
ost->enc_ctx = avcodec_alloc_context3(ost->enc);
if (!ost->enc_ctx) {
@ -1723,11 +1747,10 @@ loop_end:
}
av_dict_free(&unused_opts);
/* set the encoding/decoding_needed flags and create simple filtergraphs */
/* set the decoding_needed flags and create simple filtergraphs */
for (i = of->ost_index; i < nb_output_streams; i++) {
OutputStream *ost = output_streams[i];
ost->encoding_needed = !ost->stream_copy;
if (ost->encoding_needed && ost->source_index >= 0) {
InputStream *ist = input_streams[ost->source_index];
ist->decoding_needed = 1;