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• ffmpeg switch to "ping pong" the resulting frames [duplicate]

  18 février 2021, par Some1Else

  I am using ffmpeg to convert a series of bitmaps into an AVI file, using this syntax

  


  ffmpeg.exe -framerate 60 -start_number 1 -i BMP%05d.BMP -dst_range 1 -color_range 2 -c:v libxvid -vtag xvid -q:v 1 -y -vf format=yuv420p output.AVI


  


  which works fine.

  


  But now I want to "ping pong" the output. ie create an AVI twice as long, but the second half is the same frames in reverse. So the movie plays forward, then in reverse.

  


  I don't see any options/switches for this in the documentation. Is it possible ?

  


  Thanks for any tips.

  


• Side by Side Videos with faster frame rate [migrated]

  19 mai 2014, par user2632203

  I have been able to combine two videos into one single video with a side by side overlay and I have been able to increase the framerate for a movie but I cannot figure out how to do both. I have tried the following.

  ffmpeg -i gp1.mp4 -i gp2.mp4 -filter_complex "[0:v]setpts=0.077*(PTS-STARTPTS),    pad=iw*2:ih[bg]; [1:v]setpts=0.077*(PTS-STARTPTS)[fg]; [bg][fg]overlay=W-w-10:0:shortest=1[out]" -map "[out]" -map 0:a -c:v libx264 -crf 19 output2.avi

  My problem is that the output2.avi has all the frames sped up it plays fine but at the end of the compressed time it plays the last frame for what would be the duration of the non sped up version.

  normal sped up video takes 20 mins of play back and gives 3 min in the output file.

  side by side give 3 mins of sped video then 17 min of the last frame in output file.

• FFmpeg playing multiple videos concurrently - mute/unmute

  21 avril 2014, par pris

  I have 3 videos (video1/video2/video3). I would like to play them on different time intervals :

  • video1 plays from 0-15s (video1 with sound, video2/video3 mute)
  • video2 plays from 15-21s (video2 with sound, video1/video3 mute)
  • video1 plays from 22-30s (video1 with sound, video2/video3 mute)
  • video3 plays from 31-40s (video3 with sound, video1/video2 mute)

  I have tried the following but only video1 has sound :

  ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -filter_complex "[0:v][1:v] overlay=0:0:enable='between(t,10,20)' [tmp]; [tmp][2:v] overlay=0:0:enable='between(t,30,40)' [tmp1]; [tmp1][3:v] overlay=0:0:enable='between(t,50,60)'" final.mp4

  Console output :

      ffmpeg version N-62475-g256f530 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Apr 15 2014 22:09:47 with gcc 4.8.2 (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-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-li
  
  bmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-l
  
  ibsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --en
  
  able-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 76.100 / 52. 76.100
  
    libavcodec     55. 58.103 / 55. 58.103
  
    libavformat    55. 37.100 / 55. 37.100
  
    libavdevice    55. 13.100 / 55. 13.100
  
    libavfilter     4.  4.100 /  4.  4.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'master_video.mp4':
  
    Metadata:
  
      major_brand     : FACE
  
      minor_version   : 1337
  
      compatible_brands: isomavc1FACE
  
      creation_time   : 2013-03-30 15:06:28
  
    Duration: 00:01:57.82, start: 0.000000, bitrate: 248 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 210 kb/s, 24.88 fps, 24.88 tbr, 24880 t
  
  bn, 49.76 tbc (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._video.264 - Imported with GPAC 0.4.6-DEV-rev3544
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 36 kb/s (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._audio.aac - Imported with GPAC 0.4.6-DEV-rev3544
  
  Output #0, flv, to 'final.flv':
  
    Metadata:
  
      major_brand     : FACE
  
      minor_version   : 1337
  
      compatible_brands: isomavc1FACE
  
      encoder         : Lavf55.37.100
  
      Stream #0:0(und): Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 1k tbn, 24.88 tbc (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._video.264 - Imported with GPAC 0.4.6-DEV-rev3544
  
      Stream #0:1(und): Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 22050 Hz, mono, fltp (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._audio.aac - Imported with GPAC 0.4.6-DEV-rev3544
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> flv)
  
    Stream #0:1 -> #0:1 (aac -> libmp3lame)
  
  Press [q] to stop, [?] for help
  
  frame= 2927 fps=331 q=10.1 Lsize=    3577kB time=00:01:57.83 bitrate= 248.7kbits/s dup=0 drop=4519
  
  video:3000kB audio:460kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.369707%

  Your help will be much appreciated.