/* * RAW muxer and demuxer * Copyright (c) 2001 Fabrice Bellard. * Copyright (c) 2005 Alex Beregszaszi * * 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 "libavutil/crc.h" #include "libavcodec/ac3_parser.h" #include "libavcodec/bitstream.h" #include "libavcodec/bytestream.h" #include "avformat.h" #include "raw.h" #ifdef CONFIG_MUXERS /* simple formats */ static int flac_write_header(struct AVFormatContext *s) { static const uint8_t header[8] = { 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22 }; uint8_t *streaminfo = s->streams[0]->codec->extradata; int len = s->streams[0]->codec->extradata_size; if(streaminfo != NULL && len > 0) { put_buffer(s->pb, header, 8); put_buffer(s->pb, streaminfo, len); } return 0; } static int roq_write_header(struct AVFormatContext *s) { static const uint8_t header[] = { 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00 }; put_buffer(s->pb, header, 8); put_flush_packet(s->pb); return 0; } static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt) { put_buffer(s->pb, pkt->data, pkt->size); put_flush_packet(s->pb); return 0; } #endif //CONFIG_MUXERS /* raw input */ static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st; int id; st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); id = s->iformat->value; if (id == CODEC_ID_RAWVIDEO) { st->codec->codec_type = CODEC_TYPE_VIDEO; } else { st->codec->codec_type = CODEC_TYPE_AUDIO; } st->codec->codec_id = id; switch(st->codec->codec_type) { case CODEC_TYPE_AUDIO: st->codec->sample_rate = ap->sample_rate; st->codec->channels = ap->channels; av_set_pts_info(st, 64, 1, st->codec->sample_rate); break; case CODEC_TYPE_VIDEO: if(ap->time_base.num) av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den); else av_set_pts_info(st, 64, 1, 25); st->codec->width = ap->width; st->codec->height = ap->height; st->codec->pix_fmt = ap->pix_fmt; if(st->codec->pix_fmt == PIX_FMT_NONE) st->codec->pix_fmt= PIX_FMT_YUV420P; break; default: return -1; } return 0; } #define RAW_PACKET_SIZE 1024 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret, size, bps; // AVStream *st = s->streams[0]; size= RAW_PACKET_SIZE; ret= av_get_packet(s->pb, pkt, size); pkt->stream_index = 0; if (ret <= 0) { return AVERROR(EIO); } /* note: we need to modify the packet size here to handle the last packet */ pkt->size = ret; bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id); assert(bps); // if false there IS a bug elsewhere (NOT in this function) pkt->dts= pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels); return ret; } static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt) { int ret, size; size = RAW_PACKET_SIZE; if (av_new_packet(pkt, size) < 0) return AVERROR(EIO); pkt->pos= url_ftell(s->pb); pkt->stream_index = 0; ret = get_partial_buffer(s->pb, pkt->data, size); if (ret <= 0) { av_free_packet(pkt); return AVERROR(EIO); } pkt->size = ret; return ret; } // http://www.artificis.hu/files/texts/ingenient.txt static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret, size, w, h, unk1, unk2; if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G')) return AVERROR(EIO); // FIXME size = get_le32(s->pb); w = get_le16(s->pb); h = get_le16(s->pb); url_fskip(s->pb, 8); // zero + size (padded?) url_fskip(s->pb, 2); unk1 = get_le16(s->pb); unk2 = get_le16(s->pb); url_fskip(s->pb, 22); // ascii timestamp av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n", size, w, h, unk1, unk2); if (av_new_packet(pkt, size) < 0) return AVERROR(EIO); pkt->pos = url_ftell(s->pb); pkt->stream_index = 0; ret = get_buffer(s->pb, pkt->data, size); if (ret <= 0) { av_free_packet(pkt); return AVERROR(EIO); } pkt->size = ret; return ret; } static int raw_read_close(AVFormatContext *s) { return 0; } int pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) { AVStream *st; int block_align, byte_rate; int64_t pos; st = s->streams[0]; block_align = st->codec->block_align ? st->codec->block_align : (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3; byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 : block_align * st->codec->sample_rate; if (block_align <= 0 || byte_rate <= 0) return -1; /* compute the position by aligning it to block_align */ pos = av_rescale_rnd(timestamp * byte_rate, st->time_base.num, st->time_base.den * (int64_t)block_align, (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP); pos *= block_align; /* recompute exact position */ st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num); url_fseek(s->pb, pos + s->data_offset, SEEK_SET); return 0; } static int audio_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); st->codec->codec_type = CODEC_TYPE_AUDIO; st->codec->codec_id = s->iformat->value; st->need_parsing = AVSTREAM_PARSE_FULL; /* the parameters will be extracted from the compressed bitstream */ return 0; } /* mpeg1/h263 input */ static int video_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st; st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); st->codec->codec_type = CODEC_TYPE_VIDEO; st->codec->codec_id = s->iformat->value; st->need_parsing = AVSTREAM_PARSE_FULL; /* for mjpeg, specify frame rate */ /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/ if (ap->time_base.num) { av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den); } else if ( st->codec->codec_id == CODEC_ID_MJPEG || st->codec->codec_id == CODEC_ID_MPEG4 || st->codec->codec_id == CODEC_ID_DIRAC || st->codec->codec_id == CODEC_ID_H264) { av_set_pts_info(st, 64, 1, 25); } return 0; } #define SEQ_START_CODE 0x000001b3 #define GOP_START_CODE 0x000001b8 #define PICTURE_START_CODE 0x00000100 #define SLICE_START_CODE 0x00000101 #define PACK_START_CODE 0x000001ba #define VIDEO_ID 0x000001e0 #define AUDIO_ID 0x000001c0 static int mpegvideo_probe(AVProbeData *p) { uint32_t code= -1; int pic=0, seq=0, slice=0, pspack=0, pes=0; int i; for(i=0; i<p->buf_size; i++){ code = (code<<8) + p->buf[i]; if ((code & 0xffffff00) == 0x100) { switch(code){ case SEQ_START_CODE: seq++; break; case PICTURE_START_CODE: pic++; break; case SLICE_START_CODE: slice++; break; case PACK_START_CODE: pspack++; break; } if ((code & 0x1f0) == VIDEO_ID) pes++; else if((code & 0x1e0) == AUDIO_ID) pes++; } } if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes) return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg return 0; } #define VISUAL_OBJECT_START_CODE 0x000001b5 #define VOP_START_CODE 0x000001b6 static int mpeg4video_probe(AVProbeData *probe_packet) { uint32_t temp_buffer= -1; int VO=0, VOL=0, VOP = 0, VISO = 0, res=0; int i; for(i=0; i<probe_packet->buf_size; i++){ temp_buffer = (temp_buffer<<8) + probe_packet->buf[i]; if ((temp_buffer & 0xffffff00) != 0x100) continue; if (temp_buffer == VOP_START_CODE) VOP++; else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++; else if (temp_buffer < 0x120) VO++; else if (temp_buffer < 0x130) VOL++; else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7) && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++; } if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0) return AVPROBE_SCORE_MAX/2; return 0; } static int h263_probe(AVProbeData *p) { int code; const uint8_t *d; d = p->buf; code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2); if (code == 0x20) { return 50; } return 0; } static int h261_probe(AVProbeData *p) { int code; const uint8_t *d; d = p->buf; code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4); if (code == 0x10) { return 50; } return 0; } #define DCA_MARKER_14B_BE 0x1FFFE800 #define DCA_MARKER_14B_LE 0xFF1F00E8 #define DCA_MARKER_RAW_BE 0x7FFE8001 #define DCA_MARKER_RAW_LE 0xFE7F0180 static int dts_probe(AVProbeData *p) { const uint8_t *buf, *bufp; uint32_t state = -1; buf = p->buf; for(; buf < (p->buf+p->buf_size)-2; buf+=2) { bufp = buf; state = (state << 16) | bytestream_get_be16(&bufp); /* Regular bitstream */ if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE) return AVPROBE_SCORE_MAX/2+1; /* 14 bits big endian bitstream */ if (state == DCA_MARKER_14B_BE) if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0) return AVPROBE_SCORE_MAX/2+1; /* 14 bits little endian bitstream */ if (state == DCA_MARKER_14B_LE) if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007) return AVPROBE_SCORE_MAX/2+1; } return 0; } static int dirac_probe(AVProbeData *p) { if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D')) return AVPROBE_SCORE_MAX; else return 0; } static int ac3_probe(AVProbeData *p) { int max_frames, first_frames = 0, frames; uint8_t *buf, *buf2, *end; AC3HeaderInfo hdr; GetBitContext gbc; max_frames = 0; buf = p->buf; end = buf + p->buf_size; for(; buf < end; buf++) { buf2 = buf; for(frames = 0; buf2 < end; frames++) { init_get_bits(&gbc, buf2, 54); if(ff_ac3_parse_header(&gbc, &hdr) < 0) break; if(buf2 + hdr.frame_size > end || av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2)) break; buf2 += hdr.frame_size; } max_frames = FFMAX(max_frames, frames); if(buf == p->buf) first_frames = frames; } if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4; else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2; else if(max_frames>=1) return 1; else return 0; } static int flac_probe(AVProbeData *p) { if(memcmp(p->buf, "fLaC", 4)) return 0; else return AVPROBE_SCORE_MAX / 2; } AVInputFormat shorten_demuxer = { "shn", "raw shorten", 0, NULL, audio_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "shn", .value = CODEC_ID_SHORTEN, }; AVInputFormat flac_demuxer = { "flac", "raw flac", 0, flac_probe, audio_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "flac", .value = CODEC_ID_FLAC, }; #ifdef CONFIG_MUXERS AVOutputFormat flac_muxer = { "flac", "raw flac", "audio/x-flac", "flac", 0, CODEC_ID_FLAC, CODEC_ID_NONE, flac_write_header, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS #ifdef CONFIG_AC3_DEMUXER AVInputFormat ac3_demuxer = { "ac3", "raw ac3", 0, ac3_probe, audio_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "ac3", .value = CODEC_ID_AC3, }; #endif #ifdef CONFIG_MUXERS AVOutputFormat ac3_muxer = { "ac3", "raw ac3", "audio/x-ac3", "ac3", 0, CODEC_ID_AC3, CODEC_ID_NONE, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; AVOutputFormat dts_muxer = { "dts", "raw dts", "audio/x-dca", "dts", 0, CODEC_ID_DTS, CODEC_ID_NONE, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS AVInputFormat dirac_demuxer = { "dirac", "raw dirac", 0, dirac_probe, video_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .value = CODEC_ID_DIRAC, }; #ifdef CONFIG_MUXERS AVOutputFormat dirac_muxer = { "dirac", "raw dirac", NULL, "drc", 0, CODEC_ID_NONE, CODEC_ID_DIRAC, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif AVInputFormat dts_demuxer = { "dts", "raw dts", 0, dts_probe, audio_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "dts", .value = CODEC_ID_DTS, }; AVInputFormat aac_demuxer = { "aac", "ADTS AAC", 0, NULL, audio_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "aac", .value = CODEC_ID_AAC, }; AVInputFormat gsm_demuxer = { "gsm", "GSM", 0, NULL, audio_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "gsm", .value = CODEC_ID_GSM, }; #ifdef CONFIG_ROQ_MUXER AVOutputFormat roq_muxer = { "RoQ", "Id RoQ format", NULL, "roq", 0, CODEC_ID_ROQ_DPCM, CODEC_ID_ROQ, roq_write_header, raw_write_packet, }; #endif //CONFIG_ROQ_MUXER AVInputFormat h261_demuxer = { "h261", "raw h261", 0, h261_probe, video_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "h261", .value = CODEC_ID_H261, }; #ifdef CONFIG_MUXERS AVOutputFormat h261_muxer = { "h261", "raw h261", "video/x-h261", "h261", 0, CODEC_ID_NONE, CODEC_ID_H261, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS AVInputFormat h263_demuxer = { "h263", "raw h263", 0, h263_probe, video_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, // .extensions = "h263", //FIXME remove after writing mpeg4_probe .value = CODEC_ID_H263, }; #ifdef CONFIG_MUXERS AVOutputFormat h263_muxer = { "h263", "raw h263", "video/x-h263", "h263", 0, CODEC_ID_NONE, CODEC_ID_H263, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS AVInputFormat m4v_demuxer = { "m4v", "raw MPEG4 video format", 0, mpeg4video_probe, /** probing for mpeg4 data */ video_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "m4v", //FIXME remove after writing mpeg4_probe .value = CODEC_ID_MPEG4, }; #ifdef CONFIG_MUXERS AVOutputFormat m4v_muxer = { "m4v", "raw MPEG4 video format", NULL, "m4v", 0, CODEC_ID_NONE, CODEC_ID_MPEG4, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS AVInputFormat h264_demuxer = { "h264", "raw H264 video format", 0, NULL /*mpegvideo_probe*/, video_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe .value = CODEC_ID_H264, }; #ifdef CONFIG_MUXERS AVOutputFormat h264_muxer = { "h264", "raw H264 video format", NULL, "h264", 0, CODEC_ID_NONE, CODEC_ID_H264, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS AVInputFormat mpegvideo_demuxer = { "mpegvideo", "MPEG video", 0, mpegvideo_probe, video_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .value = CODEC_ID_MPEG1VIDEO, }; #ifdef CONFIG_MUXERS AVOutputFormat mpeg1video_muxer = { "mpeg1video", "MPEG video", "video/x-mpeg", "mpg,mpeg,m1v", 0, CODEC_ID_NONE, CODEC_ID_MPEG1VIDEO, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS #ifdef CONFIG_MUXERS AVOutputFormat mpeg2video_muxer = { "mpeg2video", "MPEG2 video", NULL, "m2v", 0, CODEC_ID_NONE, CODEC_ID_MPEG2VIDEO, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS AVInputFormat mjpeg_demuxer = { "mjpeg", "MJPEG video", 0, NULL, video_read_header, raw_read_partial_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "mjpg,mjpeg", .value = CODEC_ID_MJPEG, }; AVInputFormat ingenient_demuxer = { "ingenient", "Ingenient MJPEG", 0, NULL, video_read_header, ingenient_read_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "cgi", // FIXME .value = CODEC_ID_MJPEG, }; #ifdef CONFIG_MUXERS AVOutputFormat mjpeg_muxer = { "mjpeg", "MJPEG video", "video/x-mjpeg", "mjpg,mjpeg", 0, CODEC_ID_NONE, CODEC_ID_MJPEG, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS AVInputFormat vc1_demuxer = { "vc1", "raw vc1", 0, NULL /* vc1_probe */, video_read_header, raw_read_partial_packet, raw_read_close, .extensions = "vc1", .value = CODEC_ID_VC1, }; /* pcm formats */ #define PCMINPUTDEF(name, long_name, ext, codec) \ AVInputFormat pcm_ ## name ## _demuxer = {\ #name,\ long_name,\ 0,\ NULL,\ raw_read_header,\ raw_read_packet,\ raw_read_close,\ pcm_read_seek,\ .flags= AVFMT_GENERIC_INDEX,\ .extensions = ext,\ .value = codec,\ }; #define PCMOUTPUTDEF(name, long_name, ext, codec) \ AVOutputFormat pcm_ ## name ## _muxer = {\ #name,\ long_name,\ NULL,\ ext,\ 0,\ codec,\ CODEC_ID_NONE,\ NULL,\ raw_write_packet,\ .flags= AVFMT_NOTIMESTAMPS,\ }; #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS) #define PCMDEF(name, long_name, ext, codec) \ PCMINPUTDEF(name, long_name, ext, codec) #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS) #define PCMDEF(name, long_name, ext, codec) \ PCMOUTPUTDEF(name, long_name, ext, codec) #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS) #define PCMDEF(name, long_name, ext, codec) \ PCMINPUTDEF(name, long_name, ext, codec)\ PCMOUTPUTDEF(name, long_name, ext, codec) #else #define PCMDEF(name, long_name, ext, codec) #endif #ifdef WORDS_BIGENDIAN #define BE_DEF(s) s #define LE_DEF(s) NULL #else #define BE_DEF(s) NULL #define LE_DEF(s) s #endif PCMDEF(s16le, "pcm signed 16 bit little endian format", LE_DEF("sw"), CODEC_ID_PCM_S16LE) PCMDEF(s16be, "pcm signed 16 bit big endian format", BE_DEF("sw"), CODEC_ID_PCM_S16BE) PCMDEF(u16le, "pcm unsigned 16 bit little endian format", LE_DEF("uw"), CODEC_ID_PCM_U16LE) PCMDEF(u16be, "pcm unsigned 16 bit big endian format", BE_DEF("uw"), CODEC_ID_PCM_U16BE) PCMDEF(s8, "pcm signed 8 bit format", "sb", CODEC_ID_PCM_S8) PCMDEF(u8, "pcm unsigned 8 bit format", "ub", CODEC_ID_PCM_U8) PCMDEF(mulaw, "pcm mu law format", "ul", CODEC_ID_PCM_MULAW) PCMDEF(alaw, "pcm A law format", "al", CODEC_ID_PCM_ALAW) static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt) { int packet_size, ret, width, height; AVStream *st = s->streams[0]; width = st->codec->width; height = st->codec->height; packet_size = avpicture_get_size(st->codec->pix_fmt, width, height); if (packet_size < 0) return -1; ret= av_get_packet(s->pb, pkt, packet_size); pkt->pts= pkt->dts= pkt->pos / packet_size; pkt->stream_index = 0; if (ret != packet_size) { return AVERROR(EIO); } else { return 0; } } AVInputFormat rawvideo_demuxer = { "rawvideo", "raw video format", 0, NULL, raw_read_header, rawvideo_read_packet, raw_read_close, .flags= AVFMT_GENERIC_INDEX, .extensions = "yuv,cif,qcif,rgb", .value = CODEC_ID_RAWVIDEO, }; #ifdef CONFIG_MUXERS AVOutputFormat rawvideo_muxer = { "rawvideo", "raw video format", NULL, "yuv,rgb", 0, CODEC_ID_NONE, CODEC_ID_RAWVIDEO, NULL, raw_write_packet, .flags= AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS #ifdef CONFIG_MUXERS static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt) { return 0; } AVOutputFormat null_muxer = { "null", "null video format", NULL, NULL, 0, #ifdef WORDS_BIGENDIAN CODEC_ID_PCM_S16BE, #else CODEC_ID_PCM_S16LE, #endif CODEC_ID_RAWVIDEO, NULL, null_write_packet, .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS, }; #endif //CONFIG_MUXERS