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• How to pipe output from ffmpeg

  27 février 2015, par Andrew Simpson

  I have a c# desktop app.

  I want to stream an RTSP feed from my camera to my app, and in my app save jpegs as they come through.

  I use mpdecimate to restrict frames that are changes to the previous frame.

  If I open a DOS windows and type in :

  ffmpeg -i rtsp://admin:admin@192.168.0.17:554/video_0 -vf mpdecimate -r 10 output.avi 2>log.txt 

  it works.

  if I put this into a C# app the log file reports :

     ffmpeg version N-69779-g2a72b16 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 18.100 / 54. 18.100
  
    libavcodec     56. 22.100 / 56. 22.100
  
    libavformat    56. 21.100 / 56. 21.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.100 /  5. 11.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, rtsp, from 'rtsp://admin:admin@192.168.0.17:554/video_0':
  
    Metadata:
  
      title           : YOKO Live Streaming
  
      comment         : video_0
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 352x288 [SAR 1:1 DAR 11:9], 90k tbr, 90k tbn, 90k tbc
  
  [NULL @ 04d6a1e0] Unable to find a suitable output format for 'mpdecimate'
  
  mpdecimate: Invalid argument

  So, I tweaked it with things I thought would make it work but still teh same error.

  This is my last attempt at this :

  Process process = new Process();
  
  {
  
      FileStream baseStream = null;  
  
      string arguments = "-i rtsp://admin:admin@192.168.0.17:554/video_0 -vf image2pipe mpdecimate -r 10 - 0";
  
      string file = @"C:\bin\ffmpeg.exe";
  
      process.StartInfo.FileName = file;
  
      process.StartInfo.Arguments = arguments;
  
      process.StartInfo.CreateNoWindow = true;
  
      process.StartInfo.RedirectStandardError = true;
  
      process.StartInfo.RedirectStandardOutput = true;
  
      process.StartInfo.UseShellExecute = false;
  
      Task.Run(() =>
  
      {
  
          try
  
          {
  
              process.Start();
  
              byte[] buffer = new byte[200000];
  
              var error = process.StandardError.ReadToEnd();
  
              baseStream = process.StandardOutput.BaseStream as FileStream;
  
              bool gotHeader = false;
  
              bool imgFound = false;
  
              int counter = 0;
  
              while (true)
  
              {
  
                  byte bit1 = (byte)baseStream.ReadByte();
  
                  buffer[counter] = bit1;
  
                  if (bit1 == 217 && gotHeader)
  
                  {
  
                      if (buffer[counter - 1] == 255)
  
                      {
  
                          byte[] jpeg = new byte[counter];
  
                          Buffer.BlockCopy(buffer, 0, jpeg, 0, counter);
  
                          using (MemoryStream ms = new MemoryStream(jpeg))
  
                          {
  
                              pictureBox1.Image = Image.FromStream(ms);
  
                              ms.Close();
  
                          }
  
                          imgFound = true;
  
                      }
  
                  }
  
                  else if (bit1 == 216)
  
                  {
  
                      if (buffer[counter - 1] == 255)
  
                      {
  
                          gotHeader = true;
  
                      }
  
                  }
  
                  if (imgFound)
  
                  {
  
                      counter = 0;
  
                      buffer = new byte[200000];
  
                      imgFound = false;
  
                      gotHeader = false;
  
                  }
  
                  else
  
                  {
  
                      counter++;
  
                  }
  
              }
  
          }
  
          catch (Exception ex2)
  
          {
  
              //log error here
  
          }
  
      });
  
  }
  
  catch (Exception ex)
  
  {
  
      //log error here
  
  }

  any suggestion I will glady try out...

• ffmpeg - extract timecode start metadata from tmcd track to a drawtext filter

  3 mars 2015, par mwjb

  I have a Quicktime file with a timecode track. I’m encoding it to a new video codec and would like to burnin the timecode from timecode track. Setting the timecode manually isn’t an option as this will be used for many files with unique starting timecodes.

  This is the current work-in-progress ffmpeg command. Obviously I need to find a way to extract the metadate:timecode value and have this start the timecode count instead of the manual entry seen below :

  ffmpeg -i infile.mov -y -c:v mjpeg -qscale:v 4 -vendor ap10 -pix_fmt yuvj422p -s 1280x720 -vf drawtext="fontfile=thefont.ttf: timecode='01\:00\:00\:00': rate=24: fontsize=40: fontcolor=white: boxcolor=black: box=1: x=1700: y=80" outfile.mov

  The Timecode metadata is there in the Stream #0:1 track, as read by ffmpeg :

  ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jan  1 2015 20:24:48 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
  configuration: --prefix=/Volumes/tempdisk/sw --as=yasm --enable-gpl --enable-pthreads --disable-ffplay --disable-ffserver --disable-shared --enable-static --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-zlib --enable-avfilter --enable-fontconfig --enable-libfreetype --enable-libass --enable-libutvideo --enable-filters --enable-postproc --enable-runtime-cpudetect
  
  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
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  1.100 /  1.  1.100
  
  libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'infile.mov':
  
    Metadata:
  
  major_brand     : qt  
  
  minor_version   : 537199360
  
  compatible_brands: qt  
  
  creation_time   : 2015-03-02 22:06:00
  
  timecode        : 06:00:00:00
  
  Duration: 00:20:00.00, start: 0.000000, bitrate: 36175 kb/s
  
  Stream #0:0(eng): Video: dnxhd (AVdn / 0x6E645641), yuv422p, 1920x1080, 36175 kb/s, 24 fps, 24 tbr, 24k tbn, 24k tbc (default)
  
  Metadata:
  
    creation_time   : 2015-03-02 22:06:00
  
    handler_name    : Apple Alias Data Handler
  
    encoder         : Avid DNxHD Codec
  
  Stream #0:1(eng): Data: none (tmcd / 0x64636D74) (default)
  
  Metadata:
  
    creation_time   : 2015-03-02 22:06:58
  
    handler_name    : Apple Alias Data Handler
  
    timecode        : 06:00:00:00

  I came across this post ffmpeg and timecode from movie metadata which appeared to be on the same sort of track as I’m on. Would certainly appreciate some guidance on this. Many Thanks.

• Copy mp3 with ffmpeg not playable by QuickTime

  8 août 2016, par Joseph Johnston

  I am trying to create a video out of one image and copy audio on top. Following this (last section), I tried :

  $ ffmpeg -loop 1 -i img.jpg -i audio.mp3 -c:v libx264 -c:a copy -shortest h264.mp4
  
  ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Feb 23 2015 10:29:52 with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.5.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 ' --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, image2, from 'img.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 123986 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj440p(pc, bt470bg/unknown/unknown), 1440x900 [SAR 72:72 DAR 8:5], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  [mp3 @ 0x7f94d2034600] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, mp3, from 'audio.mp3':
  
    Metadata:
  
      genre           : Other
  
    Duration: 00:00:03.25, start: 0.000000, bitrate: 130 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, mono, s16p, 128 kb/s
  
  [swscaler @ 0x7f94d2800000] deprecated pixel format used, make sure you did set range correctly
  
  No pixel format specified, yuvj444p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x7f94d281b200] using SAR=1/1
  
  [libx264 @ 0x7f94d281b200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
  [libx264 @ 0x7f94d281b200] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
  
  [libx264 @ 0x7f94d281b200] 264 - core 142 r2455 021c0dc - 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=4 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=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'h264.mp4':
  
    Metadata:
  
      encoder         : Lavf56.15.102
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj444p(pc), 1440x900 [SAR 1:1 DAR 8:5], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.13.100 libx264
  
      Stream #0:1: Audio: mp3 (i[0][0][0] / 0x0069), 44100 Hz, mono, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=   64 fps= 30 q=28.0 size=     332kB time=00:00:00.48 bitrate=5670.9kbits/frame=   80 fps= 30 q=28.0 size=     344kB time=00:00:01.12 bitrate=2514.2kbits/frame=   96 fps= 30 q=28.0 size=     356kB time=00:00:01.76 bitrate=1655.1kbits/frame=  112 fps= 30 q=28.0 size=     367kB time=00:00:02.40 bitrate=1252.1kbits/frame=  129 fps= 31 q=28.0 size=     378kB time=00:00:03.08 bitrate=1006.5kbits/frame=  134 fps= 26 q=-1.0 Lsize=     386kB time=00:00:03.28 bitrate= 963.5kbits/s    
  
  video:331kB audio:51kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.120110%
  
  [libx264 @ 0x7f94d281b200] frame I:1     Avg QP:19.84  size:329471
  
  [libx264 @ 0x7f94d281b200] frame P:34    Avg QP:16.64  size:   189
  
  [libx264 @ 0x7f94d281b200] frame B:99    Avg QP:25.33  size:    48
  
  [libx264 @ 0x7f94d281b200] consecutive B-frames:  1.5%  0.0%  0.0% 98.5%
  
  [libx264 @ 0x7f94d281b200] mb I  I16..4:  2.8% 70.0% 27.3%
  
  [libx264 @ 0x7f94d281b200] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  1.2%  0.0%  0.0%  0.0%  0.0%    skip:98.8%
  
  [libx264 @ 0x7f94d281b200] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  0.0%  0.0%  direct: 0.0%  skip:100.0%  L0: 1.6% L1:98.4% BI: 0.0%
  
  [libx264 @ 0x7f94d281b200] 8x8 transform intra:70.0% inter:95.0%
  
  [libx264 @ 0x7f94d281b200] coded y,u,v intra: 96.4% 73.8% 72.9% inter: 0.0% 0.0% 0.0%
  
  [libx264 @ 0x7f94d281b200] i16 v,h,dc,p: 37%  4%  1% 58%
  
  [libx264 @ 0x7f94d281b200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 27%  8%  3%  5%  5%  8%  4%  9%
  
  [libx264 @ 0x7f94d281b200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 38% 18%  5%  3%  7%  7% 10%  5%  7%
  
  [libx264 @ 0x7f94d281b200] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7f94d281b200] ref P L0: 20.0%  0.4% 42.4% 37.2%
  
  [libx264 @ 0x7f94d281b200] ref B L0:  0.0% 100.0%
  
  [libx264 @ 0x7f94d281b200] ref B L1: 90.9%  9.1%
  
  [libx264 @ 0x7f94d281b200] kb/s:508.50

  But I get a video with no audio in QuickTime. I think its a problem of the output container (mp4) not supporting mp3. What output container might be best ? Due to quality loss, I am reluctant to convert the mp3 to another format. If my audio is mp3, what might I change about this ffmpeg command ?

  The final destination is YouTube.