Recherche avancée

Sur d’autres sites (8427)

• ffmpeg copyts to preserve timestamp

  13 avril 2015, par Bala

  I am trying to modify an HLS segment transport stream, and preserve its start time with ffmpeg. However the output does not preserve the input file’s start_time value, even if -copyts is mentioned. Here’s my command line :

  ffmpeg  -i fileSequence1.ts -i x.png -filter_complex '[0:v][1:v]overlay[out]' -map '[out]' -map 0:1 -acodec copy -vsync 0 -vcodec libx264 -streamid 0:257 -streamid 1:258 -copyts -profile:v baseline -level 3 output.ts

  The start_time value is delayed about 2 seconds consistently.

  /Users/macadmin/>ffmpeg -y -v verbose -i fileSequence0.ts -map 0:0 -vcodec libx264 -copyts -vsync 0 -async 0 output.ts
  
  ffmpeg version 2.5.3 Copyright (c) 2000-2015 the FFmpeg developers
  
    built on Mar 29 2015 21:31:57 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.5.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libass --enable-ffplay --enable-libfdk-aac --enable-libopus --enable-libquvi --enable-libx265 --enable-nonfree --enable-vda
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 13.100 / 56. 13.100
  
    libavformat    56. 15.102 / 56. 15.102
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  2.103 /  5.  2.103
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [h264 @ 0x7fa93b800000] Current profile doesn't provide more RBSP data in PPS, skipping
  
      Last message repeated 2 times
  
  [mpegts @ 0x7fa93a80da00] max_analyze_duration 5000000 reached at 5000000 microseconds
  
  Input #0, mpegts, from 'fileSequence0.ts':
  
    Duration: 00:00:09.65, start: 9.952111, bitrate: 412 kb/s
  
    Program 1 
  
      Stream #0:0[0x101]: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, 640x360 (640x368), 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x102]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 101 kb/s
  
  [graph 0 input from stream 0:0 @ 0x7fa93a5229c0] w:640 h:360 pixfmt:yuv420p tb:1/90000 fr:25/1 sar:0/1 sws_param:flags=2
  
  [libx264 @ 0x7fa93b800c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x7fa93b800c00] profile High, level 3.0
  
  [mpegts @ 0x7fa93b800600] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts
  
  Output #0, mpegts, to 'output.ts':
  
    Metadata:
  
      encoder         : Lavf56.15.102
  
      Stream #0:0: Video: h264 (libx264), yuv420p, 640x360, q=-1--1, 25 fps, 90k tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.13.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [NULL @ 0x7fa93b800000] Current profile doesn't provide more RBSP data in PPS, skipping
  
      Last message repeated 1 times
  
  frame=   87 fps=0.0 q=28.0 size=      91kB time=00:00:11.40 bitrate=  65.0kbits/[NULL @ 0x7fa93b800000] Current profile doesn't provide more RBSP data in PPS, skipping
  
  frame=  152 fps=151 q=28.0 size=     204kB time=00:00:14.00 bitrate= 119.4kbits/[NULL @ 0x7fa93b800000] Current profile doesn't provide more RBSP data in PPS, skipping
  
  frame=  224 fps=148 q=28.0 size=     306kB time=00:00:16.88 bitrate= 148.5kbits/No more output streams to write to, finishing.
  
  frame=  240 fps=125 q=-1.0 Lsize=     392kB time=00:00:19.52 bitrate= 164.6kbits/s    
  
  video:334kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 17.347548%
  
  Input file #0 (fileSequence0.ts):
  
    Input stream #0:0 (video): 240 packets read (360450 bytes); 240 frames decoded; 
  
    Input stream #0:1 (audio): 0 packets read (0 bytes); 
  
    Total: 240 packets (360450 bytes) demuxed
  
  Output file #0 (output.ts):
  
    Output stream #0:0 (video): 240 frames encoded; 240 packets muxed (342204 bytes); 
  
    Total: 240 packets (342204 bytes) muxed
  
  [libx264 @ 0x7fa93b800c00] frame I:3     Avg QP:15.08  size:  7856
  
  [libx264 @ 0x7fa93b800c00] frame P:81    Avg QP:21.03  size:  2807
  
  [libx264 @ 0x7fa93b800c00] frame B:156   Avg QP:23.40  size:   585
  
  [libx264 @ 0x7fa93b800c00] consecutive B-frames: 11.7%  2.5%  7.5% 78.3%
  
  [libx264 @ 0x7fa93b800c00] mb I  I16..4: 57.4% 17.5% 25.1%
  
  [libx264 @ 0x7fa93b800c00] mb P  I16..4:  8.0%  8.2%  1.0%  P16..4: 30.5% 11.3%  4.6%  0.0%  0.0%    skip:36.4%
  
  [libx264 @ 0x7fa93b800c00] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8: 34.6%  2.7%  0.2%  direct: 1.3%  skip:60.9%  L0:47.3% L1:49.1% BI: 3.6%
  
  [libx264 @ 0x7fa93b800c00] 8x8 transform intra:42.2% inter:73.3%
  
  [libx264 @ 0x7fa93b800c00] coded y,uvDC,uvAC intra: 26.2% 43.0% 6.8% inter: 5.4% 8.5% 0.1%
  
  [libx264 @ 0x7fa93b800c00] i16 v,h,dc,p: 46% 26%  6% 21%
  
  [libx264 @ 0x7fa93b800c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 50% 14% 23%  1%  2%  6%  1%  3%  1%
  
  [libx264 @ 0x7fa93b800c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40% 32% 10%  3%  3%  4%  2%  5%  2%
  
  [libx264 @ 0x7fa93b800c00] i8c dc,h,v,p: 48% 23% 26%  3%
  
  [libx264 @ 0x7fa93b800c00] Weighted P-Frames: Y:1.2% UV:0.0%
  
  [libx264 @ 0x7fa93b800c00] ref P L0: 71.5% 10.7% 14.8%  2.9%  0.1%
  
  [libx264 @ 0x7fa93b800c00] ref B L0: 95.5%  4.0%  0.5%
  
  [libx264 @ 0x7fa93b800c00] ref B L1: 96.8%  3.2%
  
  [libx264 @ 0x7fa93b800c00] kb/s:285.17
  
  
  
  ----------- FFProbe source video
  
  /Users/macadmin>ffprobe fileSequence0.ts
  
  ffprobe version 2.5.3 Copyright (c) 2007-2015 the FFmpeg developers
  
    built on Mar 29 2015 21:31:57 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.5.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libass --enable-ffplay --enable-libfdk-aac --enable-libopus --enable-libquvi --enable-libx265 --enable-nonfree --enable-vda
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 13.100 / 56. 13.100
  
    libavformat    56. 15.102 / 56. 15.102
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  2.103 /  5.  2.103
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mpegts, from 'fileSequence0.ts':
  
    Duration: 00:00:09.65, start: 9.952111, bitrate: 412 kb/s
  
    Program 1 
  
      Stream #0:0[0x101]: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, 640x360, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x102]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 101 kb/s
  
  
  
  ------ FFPROBE result video
  
  /Users/macadmin>ffprobe output.ts
  
  ffprobe version 2.5.3 Copyright (c) 2007-2015 the FFmpeg developers
  
    built on Mar 29 2015 21:31:57 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.5.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libass --enable-ffplay --enable-libfdk-aac --enable-libopus --enable-libquvi --enable-libx265 --enable-nonfree --enable-vda
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 13.100 / 56. 13.100
  
    libavformat    56. 15.102 / 56. 15.102
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  2.103 /  5.  2.103
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mpegts, from 'output.ts':
  
    Duration: 00:00:09.60, start: 11.400000, bitrate: 334 kb/s
  
    Program 1 
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 640x360, 25 fps, 25 tbr, 90k tbn, 50 tbc

  How do I ensure that output file has the same start_time ? Thanks.

• encode h264 video using ffmpeg library memory issues

  31 mars 2015, par Zeppa

  I’m trying to do screen capture on OS X using ffmpeg’s avfoundation library. I capture frames from the screen and encode it using H264 into an flv container.

  Here’s the command line output of the program :

  Input #0, avfoundation, from 'Capture screen 0':
  
    Duration: N/A, start: 9.253649, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1440x900, 14.58 tbr, 1000k tbn, 1000k tbc
  
  raw video is inCodec
  
  FLV (Flash Video)http://localhost:8090/test.flv
  
  [libx264 @ 0x102038e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x102038e00] profile High, level 4.0
  
  [libx264 @ 0x102038e00] 264 - core 142 r2495 6a301b6 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=1 weightp=2 keyint=50 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=400 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [tcp @ 0x101a5fe70] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  
  [tcp @ 0x101a5fe70] Connection to tcp://localhost:8090 failed: Connection refused
  
  url_fopen failed: Operation now in progress
  
  [flv @ 0x102038800] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
  encoded frame #0
  
  encoded frame #1
  
  ......
  
  encoded frame #49
  
  encoded frame #50
  
  testmee(8404,0x7fff7e05c300) malloc: *** error for object 0x102053e08: incorrect checksum for freed object - object was probably modified after being freed.
  
  *** set a breakpoint in malloc_error_break to debug
  
  (lldb) bt
  
  * thread #10: tid = 0x43873, 0x00007fff95639286 libsystem_kernel.dylib`__pthread_kill + 10, stop reason = signal SIGABRT
  
    * frame #0: 0x00007fff95639286 libsystem_kernel.dylib`__pthread_kill + 10
  
      frame #1: 0x00007fff9623742f libsystem_pthread.dylib`pthread_kill + 90
  
      frame #2: 0x00007fff977ceb53 libsystem_c.dylib`abort + 129
  
      frame #3: 0x00007fff9ab59e06 libsystem_malloc.dylib`szone_error + 625
  
      frame #4: 0x00007fff9ab4f799 libsystem_malloc.dylib`small_malloc_from_free_list + 1105
  
      frame #5: 0x00007fff9ab4d3bc libsystem_malloc.dylib`szone_malloc_should_clear + 1449
  
      frame #6: 0x00007fff9ab4c877 libsystem_malloc.dylib`malloc_zone_malloc + 71
  
      frame #7: 0x00007fff9ab4b395 libsystem_malloc.dylib`malloc + 42
  
      frame #8: 0x00007fff94aa63d2 IOSurface`IOSurfaceClientLookupFromMachPort + 40
  
      frame #9: 0x00007fff94aa6b38 IOSurface`IOSurfaceLookupFromMachPort + 12
  
      frame #10: 0x00007fff92bfa6b2 CoreGraphics`_CGYDisplayStreamFrameAvailable + 342
  
      frame #11: 0x00007fff92f6759c CoreGraphics`CGYDisplayStreamNotification_server + 336
  
      frame #12: 0x00007fff92bfada6 CoreGraphics`display_stream_runloop_callout + 46
  
      frame #13: 0x00007fff956eba07 CoreFoundation`__CFMachPortPerform + 247
  
      frame #14: 0x00007fff956eb8f9 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
  
      frame #15: 0x00007fff956eb86b CoreFoundation`__CFRunLoopDoSource1 + 475
  
      frame #16: 0x00007fff956dd3e7 CoreFoundation`__CFRunLoopRun + 2375
  
      frame #17: 0x00007fff956dc858 CoreFoundation`CFRunLoopRunSpecific + 296
  
      frame #18: 0x00007fff95792ef1 CoreFoundation`CFRunLoopRun + 97
  
      frame #19: 0x0000000105f79ff1 CMIOUnits`___lldb_unnamed_function2148$$CMIOUnits + 875
  
      frame #20: 0x0000000105f6f2c2 CMIOUnits`___lldb_unnamed_function2127$$CMIOUnits + 14
  
      frame #21: 0x00007fff97051765 CoreMedia`figThreadMain + 417
  
      frame #22: 0x00007fff96235268 libsystem_pthread.dylib`_pthread_body + 131
  
      frame #23: 0x00007fff962351e5 libsystem_pthread.dylib`_pthread_start + 176
  
      frame #24: 0x00007fff9623341d libsystem_pthread.dylib`thread_start + 13

  I’ve attached the code I used below.

  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  #include <libavdevice></libavdevice>avdevice.h>
  
  #include <libavutil></libavutil>opt.h>
  
  #include 
  
  #include 
  
  #include 
  
  /* compile using
  
  gcc -g -o stream test.c -lavformat -lavutil -lavcodec -lavdevice -lswscale
  
  */
  
  
  
  // void show_av_device() {
  
  
  
  //    inFmt->get_device_list(inFmtCtx, device_list);
  
  //    printf("Device Info=============\n");
  
  //    //avformat_open_input(&amp;inFmtCtx,"video=Capture screen 0",inFmt,&amp;inOptions);
  
  //    printf("===============================\n");
  
  // }
  
  
  
  void AVFAIL (int code, const char *what) {
  
      char msg[500];
  
      av_strerror(code, msg, sizeof(msg));
  
      fprintf(stderr, "failed: %s\nerror: %s\n", what, msg);
  
      exit(2);
  
  }
  
  
  
  #define AVCHECK(f) do { int e = (f); if (e &lt; 0) AVFAIL(e, #f); } while (0)
  
  #define AVCHECKPTR(p,f) do { p = (f); if (!p) AVFAIL(AVERROR_UNKNOWN, #f); } while (0)
  
  
  
  void registerLibs() {
  
      av_register_all();
  
      avdevice_register_all();
  
      avformat_network_init();
  
      avcodec_register_all();
  
  }
  
  
  
  int main(int argc, char *argv[]) {
  
  
  
      //conversion variables
  
      struct SwsContext *swsCtx = NULL;
  
      //input stream variables
  
      AVFormatContext   *inFmtCtx = NULL;
  
      AVCodecContext    *inCodecCtx = NULL;
  
      AVCodec           *inCodec = NULL;
  
      AVInputFormat     *inFmt = NULL;
  
      AVFrame           *inFrame = NULL;
  
      AVDictionary      *inOptions = NULL;
  
      const char *streamURL = "http://localhost:8090/test.flv";
  
      const char *name = "avfoundation";
  
  
  
  //    AVFrame           *inFrameYUV = NULL;
  
      AVPacket          inPacket;
  
  
  
  
  
      //output stream variables
  
      AVCodecContext    *outCodecCtx = NULL;
  
      AVCodec           *outCodec;
  
      AVFormatContext   *outFmtCtx = NULL;
  
      AVOutputFormat    *outFmt = NULL;
  
      AVFrame           *outFrameYUV = NULL;
  
      AVStream          *stream = NULL;
  
  
  
      int               i, videostream, ret;
  
      int               numBytes, frameFinished;
  
  
  
      registerLibs();
  
      inFmtCtx = avformat_alloc_context(); //alloc input context
  
      av_dict_set(&amp;inOptions, "pixel_format", "uyvy422", 0);
  
      av_dict_set(&amp;inOptions, "probesize", "7000000", 0);
  
  
  
      inFmt = av_find_input_format(name);
  
      ret = avformat_open_input(&amp;inFmtCtx, "Capture screen 0:", inFmt, &amp;inOptions);
  
      if (ret &lt; 0) {
  
          printf("Could not load the context for the input device\n");
  
          return -1;
  
      }
  
      if (avformat_find_stream_info(inFmtCtx, NULL) &lt; 0) {
  
          printf("Could not find stream info for screen\n");
  
          return -1;
  
      }
  
      av_dump_format(inFmtCtx, 0, "Capture screen 0", 0);
  
      // inFmtCtx->streams is an array of pointers of size inFmtCtx->nb_stream
  
  
  
      videostream = av_find_best_stream(inFmtCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &amp;inCodec, 0);
  
      if (videostream == -1) {
  
          printf("no video stream found\n");
  
          return -1;
  
      } else {
  
          printf("%s is inCodec\n", inCodec->long_name);
  
      }
  
      inCodecCtx = inFmtCtx->streams[videostream]->codec;
  
      // open codec
  
      if (avcodec_open2(inCodecCtx, inCodec, NULL) > 0) {
  
          printf("Couldn't open codec");
  
          return -1;  // couldn't open codec
  
      }
  
  
  
  
  
          //setup output params
  
      outFmt = av_guess_format(NULL, streamURL, NULL);
  
      if(outFmt == NULL) {
  
          printf("output format was not guessed properly");
  
          return -1;
  
      }
  
  
  
      if((outFmtCtx = avformat_alloc_context()) &lt; 0) {
  
          printf("output context not allocated. ERROR");
  
          return -1;
  
      }
  
  
  
      printf("%s", outFmt->long_name);
  
  
  
      outFmtCtx->oformat = outFmt;
  
  
  
      snprintf(outFmtCtx->filename, sizeof(outFmtCtx->filename), streamURL);
  
      printf("%s\n", outFmtCtx->filename);
  
  
  
      outCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
  
      if(!outCodec) {
  
          printf("could not find encoder for H264 \n" );
  
          return -1;
  
      }
  
  
  
      stream = avformat_new_stream(outFmtCtx, outCodec);
  
      outCodecCtx = stream->codec;
  
      avcodec_get_context_defaults3(outCodecCtx, outCodec);
  
  
  
      outCodecCtx->codec_id = AV_CODEC_ID_H264;
  
      outCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
  
      outCodecCtx->flags = CODEC_FLAG_GLOBAL_HEADER;
  
      outCodecCtx->width = inCodecCtx->width;
  
      outCodecCtx->height = inCodecCtx->height;
  
      outCodecCtx->time_base.den = 25;
  
      outCodecCtx->time_base.num = 1;
  
      outCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
  
      outCodecCtx->gop_size = 50;
  
      outCodecCtx->bit_rate = 400000;
  
  
  
      //setup output encoders etc
  
      if(stream) {
  
          ret = avcodec_open2(outCodecCtx, outCodec, NULL);
  
          if (ret &lt; 0) {
  
              printf("Could not open output encoder");
  
              return -1;
  
          }
  
      }
  
  
  
      if (avio_open(&amp;outFmtCtx->pb, outFmtCtx->filename, AVIO_FLAG_WRITE ) &lt; 0) {
  
          perror("url_fopen failed");
  
      }
  
  
  
      avio_open_dyn_buf(&amp;outFmtCtx->pb);
  
      ret = avformat_write_header(outFmtCtx, NULL);
  
      if (ret != 0) {
  
          printf("was not able to write header to output format");
  
          return -1;
  
      }
  
      unsigned char *pb_buffer;
  
      int len = avio_close_dyn_buf(outFmtCtx->pb, (unsigned char **)(&amp;pb_buffer));
  
      avio_write(outFmtCtx->pb, (unsigned char *)pb_buffer, len);
  
  
  
  
  
      numBytes = avpicture_get_size(PIX_FMT_UYVY422, inCodecCtx->width, inCodecCtx->height);
  
      // Allocate video frame
  
      inFrame = av_frame_alloc();
  
  
  
      swsCtx = sws_getContext(inCodecCtx->width, inCodecCtx->height, inCodecCtx->pix_fmt, inCodecCtx->width,
  
                              inCodecCtx->height, PIX_FMT_YUV420P, SWS_BILINEAR, NULL, NULL, NULL);
  
      int frame_count = 0;
  
      while(av_read_frame(inFmtCtx, &amp;inPacket) >= 0) {
  
          if(inPacket.stream_index == videostream) {
  
              avcodec_decode_video2(inCodecCtx, inFrame, &amp;frameFinished, &amp;inPacket);
  
              // 1 Frame might need more than 1 packet to be filled
  
              if(frameFinished) {
  
                  outFrameYUV = av_frame_alloc();
  
  
  
                  uint8_t *buffer = (uint8_t *)av_malloc(numBytes);
  
  
  
                  int ret = avpicture_fill((AVPicture *)outFrameYUV, buffer, PIX_FMT_YUV420P,
  
                                           inCodecCtx->width, inCodecCtx->height);
  
                  if(ret &lt; 0){
  
                      printf("%d is return val for fill\n", ret);
  
                      return -1;
  
                  }
  
                  //convert image to YUV
  
                  sws_scale(swsCtx, (uint8_t const * const* )inFrame->data,
  
                            inFrame->linesize, 0, inCodecCtx->height,
  
                            outFrameYUV->data, outFrameYUV->linesize);
  
                  //outFrameYUV now holds the YUV scaled frame/picture
  
                  outFrameYUV->format = outCodecCtx->pix_fmt;
  
                  outFrameYUV->width = outCodecCtx->width;
  
                  outFrameYUV->height = outCodecCtx->height;
  
  
  
  
  
                  AVPacket pkt;
  
                  int got_output;
  
                  av_init_packet(&amp;pkt);
  
                  pkt.data = NULL;
  
                  pkt.size = 0;
  
  
  
                  outFrameYUV->pts = frame_count;
  
  
  
                  ret = avcodec_encode_video2(outCodecCtx, &amp;pkt, outFrameYUV, &amp;got_output);
  
                  if (ret &lt; 0) {
  
                      fprintf(stderr, "Error encoding video frame: %s\n", av_err2str(ret));
  
                      return -1;
  
                  }
  
  
  
                  if(got_output) {
  
                      if(stream->codec->coded_frame->key_frame) {
  
                          pkt.flags |= AV_PKT_FLAG_KEY;
  
                      }
  
                      pkt.stream_index = stream->index;
  
                      if(pkt.pts != AV_NOPTS_VALUE)
  
                          pkt.pts = av_rescale_q(pkt.pts, stream->codec->time_base, stream->time_base);
  
                      if(pkt.dts != AV_NOPTS_VALUE)
  
                          pkt.dts = av_rescale_q(pkt.dts, stream->codec->time_base, stream->time_base);
  
                      if(avio_open_dyn_buf(&amp;outFmtCtx->pb)!= 0) {
  
                          printf("ERROR: Unable to open dynamic buffer\n");
  
                      }
  
                      ret = av_interleaved_write_frame(outFmtCtx, &amp;pkt);
  
                      unsigned char *pb_buffer;
  
                      int len = avio_close_dyn_buf(outFmtCtx->pb, (unsigned char **)&amp;pb_buffer);
  
                      avio_write(outFmtCtx->pb, (unsigned char *)pb_buffer, len);
  
  
  
                  } else {
  
                      ret = 0;
  
                  }
  
                  if(ret != 0) {
  
                      fprintf(stderr, "Error while writing video frame: %s\n", av_err2str(ret));
  
                      exit(1);
  
                  }
  
  
  
                  fprintf(stderr, "encoded frame #%d\n", frame_count);
  
                  frame_count++;
  
  
  
                  av_free_packet(&amp;pkt);
  
                  av_frame_free(&amp;outFrameYUV);
  
                  av_free(buffer);
  
  
  
              }
  
          }
  
          av_free_packet(&amp;inPacket);
  
      }
  
      av_write_trailer(outFmtCtx);
  
  
  
      //close video stream
  
      if(stream) {
  
          avcodec_close(outCodecCtx);
  
      }
  
      for (i = 0; i &lt; outFmtCtx->nb_streams; i++) {
  
          av_freep(&amp;outFmtCtx->streams[i]->codec);
  
          av_freep(&amp;outFmtCtx->streams[i]);
  
      }
  
      if (!(outFmt->flags &amp; AVFMT_NOFILE))
  
      /* Close the output file. */
  
          avio_close(outFmtCtx->pb);
  
      /* free the output format context */
  
      avformat_free_context(outFmtCtx);
  
  
  
      // Free the YUV frame populated by the decoder
  
      av_free(inFrame);
  
  
  
      // Close the video codec (decoder)
  
      avcodec_close(inCodecCtx);
  
  
  
      // Close the input video file
  
      avformat_close_input(&amp;inFmtCtx);
  
  
  
      return 1;
  
  
  
  }

  I’m not sure what I’ve done wrong here. But, what I’ve observed is that for each frame thats been encoded, my memory usage goes up by about 6MB. Backtracking afterward usually leads one of the following two culprits :

  1. avf_read_frame function in avfoundation.m
  2. av_dup_packet function in avpacket.h

  Can I also get advice on the way I’m using avio_open_dyn_buff function to be able to stream over http? I’ve also attached my ffmpeg library versions below :

      ffmpeg version N-70876-g294bb6c Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local --enable-gpl --enable-postproc --enable-pthreads --enable-libmp3lame --enable-libtheora --enable-libx264 --enable-libvorbis --disable-mmx --disable-ssse3 --disable-armv5te --disable-armv6 --disable-neon --enable-shared --disable-static --disable-stripping
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 29.100 / 56. 29.100
  
    libavformat    56. 26.101 / 56. 26.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 13.101 /  5. 13.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Hyper fast Audio and Video encoder

  Valgrind analysis attached here because I exceeded stack overflow’s character limit. http://pastebin.com/MPeRhjhN

• Convert wmv to mp4 with ffmpeg failing

  10 janvier 2012, par Morph

  I've seen quite a few posts on this, but I can't piece together whether I am doing things right, wrong, or need to download more stuff. I am converting from wmv to mp4 without complaints, but then when I go to play it on the browser window (HTML5) the player just turns grey and blanks out the controls.

  Installing ffmpeg I do

  ./configure --disable-yasm ; make ; make install

  Unless I include the disable yasm it wont go any further. Then I do

  ffmpeg -i myvideo.wmv myvideo.mp4

  All good so far. In my html source I have :

    <video width="320" height="240" controls="controls">
  
    <source src="myvideo.mp4" type="&#39;video/mp4;" codecs="avc1.42E01E, mp4a.40.2"></source>
  
    Your browser does not support the video tag.
  
    </video>

  I am playing this in Chrome 15 and ffmpeg -v is

  ffmpeg version 0.8.6, Copyright (c) 2000-2011 the FFmpeg developers
  
  built on Dec  1 2011 15:42:06 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51)
  
  configuration: --disable-yasm
  
  libavutil    51.  9. 1 / 51.  9. 1
  
  libavcodec   53.  7. 0 / 53.  7. 0
  
  libavformat  53.  4. 0 / 53.  4. 0
  
  libavdevice  53.  1. 1 / 53.  1. 1
  
  libavfilter   2. 23. 0 /  2. 23. 0
  
  libswscale    2.  0. 0 /  2.  0. 0

  So I get the HTML5, click on it to play the movie but then the control bar greys out, leaving the play button, but then the play button cannot be clicked and nothing plays.

  Is there something wrong with what I have done above ? Do I need to download some separate mp4 driver and compile it ? I see people referring to h.264 but I thoughts ffmpeg had that already included...