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• ffmpeg : stream copy from .mxf into NLE-compatible format

  9 juin 2013, par David

  Because my NLE software does not support the .mxf-files from Canon XF100 I need to convert them into a supported format.

  As far as I know, mxf-files are just another container format for mpeg2 streams, so it would be really nice to extract the streams and place them into another container (without reencoding).

  I think ffmpeg can do this – correct me if I'm wrong – by running the following command :

  ffmpeg -i in.mxf -vcodec copy out.m2ts (or .ts, .mts, ...)

  ffmpeg finishes without errors after about 2 seconds (in.mxf is abut 170mb) :

  c:\video>c:\ffmpeg\bin\ffmpeg -i in.MXF -vcodec copy out.m2ts
  
  ffmpeg version N-53680-g0ab9362 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on May 30 2013 12:14:03 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 34.100 / 52. 34.100
  
    libavcodec     55. 12.102 / 55. 12.102
  
    libavformat    55.  8.100 / 55.  8.100
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 73.100 /  3. 73.100
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Guessed Channel Layout for  Input Stream #0.2 : mono
  
  Input #0, mxf, from 'in.MXF':
  
    Metadata:
  
      uid             : 1bb23c97-6205-4800-80a2-e00002244ba7
  
      generation_uid  : 1bb23c97-6205-4800-8122-e00002244ba7
  
      company_name    : CANON
  
      product_name    : XF100
  
      product_version : 1.00
  
      product_uid     : 060e2b34-0401-010d-0e15-005658460100
  
      modification_date: 2013-01-06 11:05:02
  
      timecode        : 01:42:14:22
  
    Duration: 00:00:28.32, start: 0.000000, bitrate: 51811 kb/s
  
      Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9
  
  ], 25 fps, 25 tbr, 25 tbn, 50 tbc
  
      Stream #0:1: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
  
      Stream #0:2: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
  
  Output #0, mpegts, to 'out.m2ts':
  
    Metadata:
  
      uid             : 1bb23c97-6205-4800-80a2-e00002244ba7
  
      generation_uid  : 1bb23c97-6205-4800-8122-e00002244ba7
  
      company_name    : CANON
  
      product_name    : XF100
  
      product_version : 1.00
  
      product_uid     : 060e2b34-0401-010d-0e15-005658460100
  
      modification_date: 2013-01-06 11:05:02
  
      timecode        : 01:42:14:22
  
      encoder         : Lavf55.8.100
  
      Stream #0:0: Video: mpeg2video, yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-3
  
  1, 25 fps, 90k tbn, 25 tbc
  
      Stream #0:1: Audio: mp2, 48000 Hz, mono, s16, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (pcm_s16le -> mp2)
  
  Press [q] to stop, [?] for help
  
  frame=  532 fps=0.0 q=-1.0 size=  143511kB time=00:00:21.25 bitrate=55314.1kbits
  
  frame=  561 fps=435 q=-1.0 size=  151254kB time=00:00:22.42 bitrate=55242.0kbits
  
  frame=  586 fps=314 q=-1.0 size=  158021kB time=00:00:23.41 bitrate=55288.0kbits
  
  frame=  609 fps=255 q=-1.0 size=  164182kB time=00:00:24.34 bitrate=55235.4kbits
  
  frame=  636 fps=217 q=-1.0 size=  171463kB time=00:00:25.42 bitrate=55235.1kbits
  
  frame=  669 fps=194 q=-1.0 size=  180133kB time=00:00:26.72 bitrate=55226.3kbits
  
  frame=  699 fps=173 q=-1.0 size=  188326kB time=00:00:27.92 bitrate=55256.6kbits
  
  frame=  708 fps=169 q=-1.0 Lsize=  190877kB time=00:00:28.30 bitrate=55233.6kbit
  
  s/s
  
  video:172852kB audio:442kB subtitle:0 global headers:0kB muxing overhead 10.1461
  
  18%

  Unfortunately the output file turns out to be displayed correctly only by vlc player.
  My NLE-software (Cyberlink Power Director) is able to open the file but most of the picture is green. Only a few pixels on the left edge show the original video :

  output file

  Any ideas how to solve that problem ? Is there a better way to use .mxf-files in NLE-software without native support ?

  thanks in advance

• Capture Windows screen with ffmpeg

  4 mars 2021, par kamae

  The ffmpeg is cross-platform and very powerful software to handle video/audio or to stream it.
On Linux ffmpeg can capture X11 screen with a command below :

  



  ffmpeg -f x11grab -r 25 -s cif -i :0.0 out.mpeg


  



  But is it possible to grab Windows Desktop with ffmpeg ?

  


• how to put EXEC command in loop in TCL with windows platform

  26 février 2019, par M. D. P

  how to put EXEC command in loop in TCL with windows platform.

  I need to run EXEC command continuously. but the problem after its first execution it stops.

  my code is

  proc a {} {
  
    set a 1
  
    for {set i 0} {$i < 10} {incr i} {
  
      puts "I inside first loop: $i"
  
      exec ffmpeg -f dshow -benchmark -i "video=Integrated Webcam" \
  
              -s 1280x720 c:/test/sample_image.avi
  
    }
  
  }
  
  a

  The above program should capture 10 video. but it captures only one video and comes out from the loop and stops the execution.

  can any of my friend help me by providing me the answer with the required modification in code.