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• Merge commit ’23f741f79327e31be7b2a75ebb2e02111e06e52f’

  28 mai 2014, par Michael Niedermayer

  Merge commit ’23f741f79327e31be7b2a75ebb2e02111e06e52f’
  * commit ’23f741f79327e31be7b2a75ebb2e02111e06e52f’ :
  
    matroskadec : parse the channel layout mask for FLAC
  Conflicts :
  
  	libavformat/oggparsevorbis.c
  Merged-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/Makefile
  • [DH] libavformat/flacdec.c
  • [DH] libavformat/matroskadec.c
  • [DH] libavformat/oggdec.h
  • [DH] libavformat/oggparsecelt.c
  • [DH] libavformat/oggparseflac.c
  • [DH] libavformat/oggparseogm.c
  • [DH] libavformat/oggparseopus.c
  • [DH] libavformat/oggparsespeex.c
  • [DH] libavformat/oggparsetheora.c
  • [DH] libavformat/oggparsevorbis.c
  • [DH] libavformat/oggparsevp8.c

• FFMPEG HTTP protocol closing after first packet

  27 août 2019, par rusty

  I’m trying to send a live video stream from my webcam to FFMPEG via the HTTP protocol. However after the first packet is sent FFMPEG closes, but does indeed output a fully playable video. As my intention.

  After going over the documentation for the protocol I thought mulitiple_requests would stop this behavior which it did not. After searching online for a few hours I can not find an example specific to my scenario. i.e. receiving a network stream over HTTP.

  Code running on the client-side :

  var xhttp=new XMLHttpRequest;
  
  
  
  if (navigator.mediaDevices) {
  
  
  
      var constraints = { audio: true, video: true };
  
  
  
      navigator.mediaDevices.getUserMedia(constraints)
  
        .then(function(stream) {
  
          var mediaRecorder = new MediaRecorder(stream);
  
          m = mediaRecorder;
  
          m.start();
  
          m.ondataavailable=e=>{
  
            xhttp.open("POST","http://localhost:8080");
  
            xhttp.send(e.data);
  
          }
  
          setInterval(function(){
  
            m.requestData();
  
          },2000);
  
        }).catch(function(error) {
  
          console.log(error.message);
  
        });
  
  }

  The FFMPEG command I have tried thus far :

  ffmpeg -listen 1 -multiple_requests -i http://localhost:8080 file.webm

  Maybe this is not possible with FFMPEG ? If this is the case then it appears the only solution would be to put this command in a loop and keep appending to the output.

• Converting from FLV to MP4 using ffmpeg

  14 juillet 2016, par Brad

  I have a library of several thousand flv files which I need to convert to mp4. I’m trying to use ffmpeg to do so but I’m running into some issues.

  Primarily :

  1) I can’t switch from FLV to MP4 without re-encoding. If I do I get a message from ffmpeg saying "Could not find tag for codec flv1 in stream #0, codec not currently supported in container"

  2) If I re-encode the videos, the resultant videos are lower quality (I see artifacting in VLC) AND larger. For example one video went from 2.5MB to 4.3MB (almost double in size)

  Given number two you may be asking yourself - why convert then ?

  The answer is I need to stream these to mobile devices (phones/tablets etc) and flv isn’t supported. So I need to convert the files but I can’t tolerate more than a minimum change in quality, and preferably zero to no increase in size.

  Here’s the ffmpeg command I’m running :

  ffmpeg -i $_.FullName -movflags faststart -profile:v baseline -level 3.0 "$($_.BaseName).mp4"

  (Note that I’m running ffmpeg from powershell so :

  $_.FullName = the original file name 
  
  "$($_.BaseName).mp4" = the original file name with mp4 extension)

  Can any FFMPEG guru’s help me to understand what I’m doing wrong ? Is there some set of parameters I can use to make this conversion result in less loss of quality and similar size ?

  Note I’ve also tried "-c:v libx264 -preset veryslow -crf 23 -c:a copy". Using present "veryslow" doesn’t result in any appreciable difference.

  UPDATE
  I’m using the following options :

  ffmpeg -i $_.FullName -c:v libx264 -preset veryslow -crf 19 -c:a copy "$($_.BaseName).mp4"

  Here’s the full output :

      ffmpeg version 2.8.4 Copyright (c) 2000-2015 the FFmpeg developers
  
        built with gcc 5.2.0 (GCC)
  
        configuration : —enable-gpl —enable-version3 —disable-w32threads —enable-avisynth —enable-bzlib —enable-fontconfi
  
      g —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —
  
      enable-libdcadec —enable-libfreetype —enable-libgme —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libm
  
      p3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-librtmp —en
  
      able-libschroedinger —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —ena
  
      ble-libvo-aacenc —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enabl
  
      e-libx264 —enable-libx265 —enable-libxavs —enable-libxvid —enable-lzma —enable-decklink —enable-zlib
  
        libavutil      54. 31.100 / 54. 31.100
  
        libavcodec     56. 60.100 / 56. 60.100
  
        libavformat    56. 40.101 / 56. 40.101
  
        libavdevice    56.  4.100 / 56.  4.100
  
        libavfilter     5. 40.101 /  5. 40.101
  
        libswscale      3.  1.101 /  3.  1.101
  
        libswresample   1.  2.101 /  1.  2.101
  
        libpostproc    53.  3.100 / 53.  3.100
  
      Input #0, flv, from ’C :\Users\brad\Desktop\ffmpeg\Originals\1019800-1278575542468.flv’ :
  
        Metadata :
  
          canSeekToEnd : false
  
          createdby : FMS 3.5
  
          creationdate : Thu Jul 08 03:52:25 2010
  
        Duration : 00:00:56.94, start : 0.000000, bitrate : 360 kb/s
  
          Stream #0:0 : Video : flv1, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
  
          [libx264 @ 02cf7300] using cpu capabilities : MMX2 SSE2Fast SSSE3 SSE4.2
  
          [libx264 @ 02cf7300] profile High, level 4.2
  
          [libx264 @ 02cf7300] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.or
  
      g/x264.html - options : cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=1.00:0.00 mixed_ref=1
  
       me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=7 lookahead_th
  
      reads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=
  
      2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=60
  
      rc=crf mbtree=1 crf=19.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
      Output #0, mp4, to ’1019800-1278575542468.mp4’ :
  
        Metadata :
  
          canSeekToEnd : false
  
          createdby : FMS 3.5
  
          creationdate : Thu Jul 08 03:52:25 2010
  
          encoder : Lavf56.40.101
  
          Stream #0:0 : Video : h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 320x240, q=-1—1, 1k fps, 16k tbn, 1k tbc
  
          Metadata :
  
            encoder : Lavc56.60.100 libx264
  
      Stream mapping :
  
        Stream #0:0 -> #0:0 (flv1 (flv) -> h264 (libx264))
  
      Press [q] to stop, [?] for help
  
      frame=57117 fps=199 q=-1.0 Lsize=    5611kB time=00:00:57.11 bitrate= 804.8kbits/s dup=56685 drop=0
  
      video:5184kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : 8.229259%
  
      [libx264 @ 02cf7300] frame I:230   Avg QP:15.92  size :  8828
  
      [libx264 @ 02cf7300] frame P:6399  Avg QP:17.19  size :   385
  
      [libx264 @ 02cf7300] frame B:50488 Avg QP:27.13  size :    16
  
      [libx264 @ 02cf7300] consecutive B-frames :  0.4%  0.0%  0.0%  0.0%  0.0%  2.3%  0.0%  0.0% 97.2%
  
      [libx264 @ 02cf7300] mb I  I16..4 :  2.9% 92.6%  4.5%
  
      [libx264 @ 02cf7300] mb P  I16..4 :  0.1%  2.0%  0.2%  P16..4 :  2.4%  1.2%  1.1%  0.1%  0.0%    skip:92.9%
  
      [libx264 @ 02cf7300] mb B  I16..4 :  0.0%  0.0%  0.0%  B16..8 :  2.6%  0.0%  0.0%  direct : 0.0%  skip:97.3%  L0:45.0% L1:5
  
  4.9% BI : 0.0%
  
      [libx264 @ 02cf7300] 8x8 transform intra:90.7% inter:76.5%
  
      [libx264 @ 02cf7300] direct mvs  spatial:75.2% temporal:24.8%
  
      [libx264 @ 02cf7300] coded y,uvDC,uvAC intra : 94.4% 96.8% 64.8% inter : 0.3% 0.4% 0.1%
  
      [libx264 @ 02cf7300] i16 v,h,dc,p : 16% 25% 18% 41%
  
      [libx264 @ 02cf7300] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 19% 28% 30%  4%  3%  3%  4%  4%  5%
  
      [libx264 @ 02cf7300] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu : 18% 22%  9% 11%  8%  7% 10%  8%  7%
  
      [libx264 @ 02cf7300] i8c dc,h,v,p : 30% 34% 23% 13%
  
      [libx264 @ 02cf7300] Weighted P-Frames : Y:0.1% UV:0.1%
  
      [libx264 @ 02cf7300] ref P L0 : 74.1% 19.7%  4.5%  0.6%  0.1%  0.2%  0.0%  0.1%  0.0%  0.1%  0.0%  0.2%  0.0%  0.2%  0.0%
  
    0.1%
  
      [libx264 @ 02cf7300] ref B L0 : 95.5%  1.6%  0.7%  0.5%  0.4%  0.3%  0.3%  0.2%  0.1%  0.1%  0.1%  0.1%  0.1%  0.0%  0.0%
      [libx264 @ 02cf7300] ref B L1 : 84.5% 15.5%
  
      [libx264 @ 02cf7300] kb/s:743.46
  

  Original Video Size: 2.44 MB
  
  New Video Size: 5.6 MB