├── start_build.sh ├── log.h ├── .gitignore ├── CMakeLists.txt ├── README.md ├── demuxer1.c ├── demuxer2.c └── LICENSE /start_build.sh: -------------------------------------------------------------------------------- 1 | #/bin/sh 2 | 3 | if test -d build ; 4 | then rm -rf build 5 | fi 6 | mkdir build 7 | 8 | cd build 9 | cmake .. 10 | #cmake .. && make -------------------------------------------------------------------------------- /log.h: -------------------------------------------------------------------------------- 1 | /* 2 | * @file log.h 3 | * @auther Akagi201 4 | * 5 | * @date 2014/09/16 6 | */ 7 | 8 | #ifndef LOG_H_ 9 | #define LOG_H_ (1) 10 | 11 | #ifdef NODEBUG 12 | #define LOG(fmt, ...) do {} while (0) 13 | #else 14 | #define LOG(fmt, ...) fprintf(stdout, "[DEBUG] %s:%s:%d: " fmt "\n", __FILE__, __FUNCTION__, __LINE__, ##__VA_ARGS__) 15 | #endif 16 | 17 | #endif // LOG_H_ -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Object files 2 | *.o 3 | *.ko 4 | *.obj 5 | *.elf 6 | 7 | # Precompiled Headers 8 | *.gch 9 | *.pch 10 | 11 | # Libraries 12 | *.lib 13 | *.a 14 | *.la 15 | *.lo 16 | 17 | # Shared objects (inc. Windows DLLs) 18 | *.dll 19 | *.so 20 | *.so.* 21 | *.dylib 22 | 23 | # Executables 24 | *.exe 25 | *.out 26 | *.app 27 | *.i*86 28 | *.x86_64 29 | *.hex 30 | 31 | /build 32 | -------------------------------------------------------------------------------- /CMakeLists.txt: -------------------------------------------------------------------------------- 1 | # 2 | # @file CMakeLists.txt 3 | # @author Akagi201 4 | # @date 2014/10/10 5 | # 6 | 7 | cmake_minimum_required(VERSION 2.8.4) 8 | project(ffmpeg_demuxer) 9 | 10 | set(SOURCE_FILES1 demuxer1.c) 11 | 12 | set(SOURCE_FILES2 demuxer2.c) 13 | 14 | include_directories("/usr/local/include") 15 | 16 | link_directories("/usr/local/lib") 17 | 18 | add_executable(demuxer1 ${SOURCE_FILES1}) 19 | 20 | add_executable(demuxer2 ${SOURCE_FILES2}) 21 | 22 | target_link_libraries(demuxer1 "libavformat.a") 23 | 24 | target_link_libraries(demuxer1 "libavcodec.a") 25 | 26 | target_link_libraries(demuxer1 "libavutil.a") 27 | 28 | target_link_libraries(demuxer2 "libavformat.a") 29 | 30 | target_link_libraries(demuxer2 "libavcodec.a") 31 | 32 | target_link_libraries(demuxer2 "libavutil.a") -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ffmpeg-demuxer 2 | ============== 3 | 4 | Split Audio and Video bitstreams based on FFmpeg 5 | 6 | ## Features 7 | * demux1: Demux a FLV file to H.264 bitstream and mp3 bitstream. 8 | * demux2: Demux a MPEG2TS file to H.264 bitstream and AAC bitstream. 9 | * Use cmake for cross-platform build. 10 | 11 | ## Notes 12 | ### demux1 13 | * It doesn't init Output Video/Audio stream's AVFormatContext. It just writes AVPacket's data to files directly. 14 | * Tt's not suitable for some kind of bitstreams. For example, AAC bitstream in FLV/MP4/MKV Container Format(data in AVPacket lack of 7 bytes of ADTS header). 15 | 16 | ## Dependencies 17 | 18 | ### demux1 19 | * libavformat 20 | * libavcodec 21 | 22 | ### demux2 23 | * libavformat 24 | * libavcodec 25 | * libavutil 26 | 27 | ## Build 28 | * `./start_build.sh` 29 | * build target is located in build/. 30 | 31 | ## Usage 32 | * `demux1` 33 | * `demux2` -------------------------------------------------------------------------------- /demuxer1.c: -------------------------------------------------------------------------------- 1 | 2 | /* 3 | * @file main.c 4 | * @author Akagi201 5 | * @date 2014/10/10 6 | * 7 | * 8 | */ 9 | 10 | #include 11 | 12 | #include 13 | #include 14 | 15 | #include "log.h" 16 | 17 | /* 18 | FIX: H.264 in some container format (FLV, MP4, MKV etc.) need 19 | "h264_mp4toannexb" bitstream filter (BSF) 20 | *Add SPS,PPS in front of IDR frame 21 | *Add start code ("0,0,0,1") in front of NALU 22 | H.264 in some container (MPEG2TS) don't need this BSF. 23 | */ 24 | // '1': Use H.264 Bitstream Filter 25 | #define USE_H264BSF (1) 26 | 27 | int main(int argc, char *argv[]) { 28 | AVFormatContext *ifmt_ctx = NULL; 29 | AVPacket pkt; 30 | int ret = 0; 31 | int i = 0; 32 | int videoindex = -1; 33 | int audioindex = -1; 34 | char *in_filename = "input.flv"; // Input File URL 35 | char *out_filename_v = "output.h264"; // Output File URL 36 | char *out_filename_a = "output.mp3"; 37 | FILE *fp_audio = NULL; 38 | FILE *fp_video = NULL; 39 | 40 | av_register_all(); 41 | 42 | // Input 43 | if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) { 44 | LOG("Open input file failed."); 45 | return -1; 46 | } 47 | 48 | if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) { 49 | LOG("Retrieve input stream info failed."); 50 | return -1; 51 | } 52 | 53 | videoindex = -1; 54 | 55 | for (i = 0; i < ifmt_ctx->nb_streams; ++i) { 56 | if (AVMEDIA_TYPE_VIDEO == ifmt_ctx->streams[i]->codec->codec_type) { 57 | videoindex = i; 58 | } else if (AVMEDIA_TYPE_AUDIO == ifmt_ctx->streams[i]->codec->codec_type) { 59 | audioindex = i; 60 | } 61 | } 62 | 63 | // Dump Format 64 | LOG("Input Video Start"); 65 | av_dump_format(ifmt_ctx, 0, in_filename, 0); 66 | LOG("Input Video End"); 67 | 68 | fp_audio = fopen(out_filename_a, "wb+"); 69 | fp_video = fopen(out_filename_v, "wb+"); 70 | 71 | /* 72 | FIX: H.264 in some container format (FLV, MP4, MKV etc.) need 73 | "h264_mp4toannexb" bitstream filter (BSF) 74 | *Add SPS,PPS in front of IDR frame 75 | *Add start code ("0,0,0,1") in front of NALU 76 | H.264 in some container (MPEG2TS) don't need this BSF. 77 | */ 78 | 79 | #if USE_H264BSF 80 | AVBitStreamFilterContext* h264bsfc = av_bitstream_filter_init("h264_mp4toannexb"); 81 | #endif 82 | 83 | while (av_read_frame(ifmt_ctx, &pkt) >= 0) { 84 | if (pkt.stream_index == videoindex) { 85 | #if USE_H264BSF 86 | av_bitstream_filter_filter(h264bsfc, ifmt_ctx->streams[videoindex]->codec, NULL, &pkt.data, &pkt.size, pkt.data, pkt.size, 0); 87 | #endif 88 | LOG("Write Video Packet. size: %d\t pts:%d\n", pkt.size, pkt.pts); 89 | fwrite(pkt.data, 1, pkt.size, fp_video); 90 | } else if (pkt.stream_index == audioindex) { 91 | /* 92 | AAC in some container format (FLV, MP4, MKV etc.) need to add 7 Bytes 93 | ADTS Header in front of AVPacket data manually. 94 | Other Audio Codec (MP3...) works well. 95 | */ 96 | LOG("Write Audio Packet. size:%d\t pts: %d\n", pkt.size, pkt.pts); 97 | fwrite(pkt.data, 1, pkt.size, fp_audio); 98 | } 99 | av_free_packet(&pkt); 100 | } 101 | 102 | #if USE_H264BSF 103 | av_bitstream_filter_close(h264bsfc); 104 | #endif 105 | 106 | fclose(fp_video); 107 | fclose(fp_audio); 108 | 109 | avformat_close_input(&ifmt_ctx); 110 | 111 | if (ret < 0 && ret != AVERROR_EOF) { 112 | LOG("Error occurred."); 113 | return -1; 114 | } 115 | 116 | return 0; 117 | } -------------------------------------------------------------------------------- /demuxer2.c: -------------------------------------------------------------------------------- 1 | /* 2 | * @file demuxer2.c 3 | * @author Akagi201 4 | * @date 2014/10/10 5 | * 6 | * Demux a MPEG2TS file to H.264 bitstream and AAC bitstream. 7 | */ 8 | 9 | #include 10 | 11 | #include 12 | #include 13 | #include 14 | 15 | #include "log.h" 16 | 17 | /* 18 | FIX: H.264 in some container format (FLV, MP4, MKV etc.) need 19 | "h264_mp4toannexb" bitstream filter (BSF) 20 | *Add SPS,PPS in front of IDR frame 21 | *Add start code ("0,0,0,1") in front of NALU 22 | H.264 in some container (MPEG2TS) don't need this BSF. 23 | */ 24 | //'1': Use H.264 Bitstream Filter 25 | #define USE_H264BSF (0) 26 | 27 | int main(int argc, char* argv[]) { 28 | AVOutputFormat *ofmt_a = NULL; 29 | AVOutputFormat *ofmt_v = NULL; 30 | 31 | AVFormatContext *ifmt_ctx = NULL; 32 | AVFormatContext *ofmt_ctx = NULL; 33 | AVFormatContext *ofmt_ctx_a = NULL; 34 | AVFormatContext *ofmt_ctx_v = NULL; 35 | 36 | AVPacket pkt; 37 | 38 | int ret = 0; 39 | int i = 0; 40 | int videoindex = -1; 41 | int audioindex = -1; 42 | int frame_index = 0; 43 | 44 | AVStream *in_stream = NULL; 45 | AVStream *out_stream = NULL; 46 | 47 | char *in_filename = "input.ts"; // Input file URL 48 | char *out_filename_v = "output.h264"; // Output file URL 49 | char *out_filename_a = "output.aac"; 50 | 51 | av_register_all(); 52 | 53 | // Input 54 | if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) { 55 | LOG("Open input file failed."); 56 | goto end; 57 | } 58 | 59 | if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) { 60 | LOG("Retrieve iniput stream info failed."); 61 | goto end; 62 | } 63 | 64 | // Output 65 | avformat_alloc_output_context2(&ofmt_ctx_v, NULL, NULL, out_filename_v); 66 | if (!ofmt_ctx_v) { 67 | LOG("Create output context failed."); 68 | ret = AVERROR_UNKNOWN; 69 | goto end; 70 | } 71 | ofmt_v = ofmt_ctx_v->oformat; 72 | 73 | avformat_alloc_output_context2(&ofmt_ctx_a, NULL, NULL, out_filename_a); 74 | if (!ofmt_ctx_a) { 75 | LOG("Create output context failed."); 76 | ret = AVERROR_UNKNOWN; 77 | goto end; 78 | } 79 | ofmt_a = ofmt_ctx_a->oformat; 80 | 81 | for (i = 0; i < ifmt_ctx->nb_streams; ++i) { 82 | // Create output AVStream according to input AVStream 83 | in_stream = ifmt_ctx->streams[i]; 84 | 85 | if (AVMEDIA_TYPE_VIDEO == ifmt_ctx->streams[i]->codec->codec_type) { 86 | videoindex = i; 87 | out_stream = avformat_new_stream(ofmt_ctx_v, in_stream->codec->codec); 88 | ofmt_ctx = ofmt_ctx_v; 89 | } else if (AVMEDIA_TYPE_AUDIO == ifmt_ctx->streams[i]->codec->codec_type) { 90 | audioindex = i; 91 | out_stream = avformat_new_stream(ofmt_ctx_a, in_stream->codec->codec); 92 | ofmt_ctx = ofmt_ctx_a; 93 | } else { 94 | break; 95 | } 96 | 97 | if (!out_stream) { 98 | LOG("Allocating output stream failed."); 99 | ret = AVERROR_UNKNOWN; 100 | goto end; 101 | } 102 | 103 | // Copy the settings of AVCodecContext 104 | if (avcodec_copy_context(out_stream->codec, in_stream->codec) < 0) { 105 | LOG("Copy context from input to output stream codec context."); 106 | goto end; 107 | } 108 | 109 | out_stream->codec->codec_tag = 0; 110 | 111 | if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) { 112 | out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER; 113 | } 114 | } 115 | 116 | // Dump Format 117 | LOG("Input Video Start!"); 118 | av_dump_format(ifmt_ctx, 0, in_filename, 0); 119 | LOG("Output Video Start!"); 120 | av_dump_format(ofmt_ctx_v, 0, out_filename_v, 1); 121 | LOG("Output Audio Start!"); 122 | av_dump_format(ofmt_ctx_a, 0, out_filename_a, 1); 123 | LOG("Dump End"); 124 | 125 | // Open output file 126 | if (!(ofmt_v->flags & AVFMT_NOFILE)) { 127 | if (avio_open(&ofmt_ctx_v->pb, out_filename_v, AVIO_FLAG_WRITE) < 0) { 128 | LOG("Could not open output file '%s'", out_filename_v); 129 | goto end; 130 | } 131 | } 132 | 133 | if (!(ofmt_a->flags & AVFMT_NOFILE)) { 134 | if (avio_open(&ofmt_ctx_a->pb, out_filename_a, AVIO_FLAG_WRITE) < 0) { 135 | LOG("Could not open output file '%s'", out_filename_a); 136 | goto end; 137 | } 138 | } 139 | 140 | // Write file header 141 | if (avformat_write_header(ofmt_ctx_v, NULL) < 0) { 142 | LOG("Error occurred when opening video output file."); 143 | goto end; 144 | } 145 | 146 | if (avformat_write_header(ofmt_ctx_a, NULL) < 0) { 147 | LOG("Error occurred when opening audio output file."); 148 | goto end; 149 | } 150 | 151 | #if USE_H264BSF 152 | AVBitSreamFilterContext* h264bsfc = av_bitstream_filter_init("h264_mp4toannexb"); 153 | #endif 154 | 155 | frame_index = 0; 156 | 157 | while (1) { 158 | // Get an AVPacket 159 | if (av_read_frame(ifmt_ctx, &pkt) < 0) { 160 | break; 161 | } 162 | 163 | in_stream = ifmt_ctx->streams[pkt.stream_index]; 164 | 165 | if (videoindex == pkt.stream_index) { 166 | out_stream = ofmt_ctx_v->streams[0]; 167 | ofmt_ctx = ofmt_ctx_v; 168 | LOG("Write Video Packet. size: %d\t pts: %d\n", pkt.size, pkt.pts); 169 | #if USE_H264BSF 170 | av_bitstream_filter_filter(h264bsfc, in_stream->codec, NULL, &pkt.data, &pkt.size, pkt.data, pkt.size, 0); 171 | #endif 172 | } else if (audioindex == pkt.stream_index) { 173 | out_stream = ofmt_ctx_a->streams[0]; 174 | ofmt_ctx = ofmt_ctx_a; 175 | LOG("Write Audio Packet. size: %d\t pts: %d\n", pkt.size, pkt.pts); 176 | } else { 177 | continue; 178 | } 179 | 180 | // Copy Packet 181 | // Convert PTS/DTS 182 | pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, (enum AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX)); 183 | pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, (enum AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX)); 184 | pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base); 185 | pkt.pos = -1; 186 | pkt.stream_index = 0; 187 | 188 | // Write 189 | if (av_interleaved_write_frame(ofmt_ctx, &pkt) < 0) { 190 | LOG("Error muxing packet."); 191 | break; 192 | } 193 | 194 | LOG("Write %8d frames to output file.", frame_index); 195 | av_free_packet(&pkt); 196 | ++frame_index; 197 | } 198 | 199 | #if USE_H264BSF 200 | av_bitstream_filter_close(h264bsfc); 201 | #endif 202 | 203 | // Write file trailer 204 | av_write_trailer(ofmt_ctx_a); 205 | av_write_trailer(ofmt_ctx_v); 206 | 207 | end: 208 | avformat_close_input(&ifmt_ctx); 209 | 210 | // close output 211 | if (ofmt_ctx_a && !(ofmt_a->flags & AVFMT_NOFILE)) { 212 | avio_close(ofmt_ctx_a->pb); 213 | } 214 | 215 | if (ofmt_ctx_v && !(ofmt_v->flags & AVFMT_NOFILE)) { 216 | avio_close(ofmt_ctx_v->pb); 217 | } 218 | 219 | avformat_free_context(ofmt_ctx_a); 220 | avformat_free_context(ofmt_ctx_v); 221 | 222 | if (ret < 0 && ret != AVERROR_EOF) { 223 | LOG("Error occurred."); 224 | return -1; 225 | } 226 | 227 | return 0; 228 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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If you wish to incorporate parts of the Program into other free 251 | programs whose distribution conditions are different, write to the author 252 | to ask for permission. For software which is copyrighted by the Free 253 | Software Foundation, write to the Free Software Foundation; we sometimes 254 | make exceptions for this. Our decision will be guided by the two goals 255 | of preserving the free status of all derivatives of our free software and 256 | of promoting the sharing and reuse of software generally. 257 | 258 | NO WARRANTY 259 | 260 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 261 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 262 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 263 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 264 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 265 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 268 | REPAIR OR CORRECTION. 269 | 270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 278 | POSSIBILITY OF SUCH DAMAGES. 279 | 280 | END OF TERMS AND CONDITIONS 281 | 282 | How to Apply These Terms to Your New Programs 283 | 284 | If you develop a new program, and you want it to be of the greatest 285 | possible use to the public, the best way to achieve this is to make it 286 | free software which everyone can redistribute and change under these terms. 287 | 288 | To do so, attach the following notices to the program. It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | {description} 294 | Copyright (C) {year} {fullname} 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | {signature of Ty Coon}, 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | 341 | --------------------------------------------------------------------------------