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• Ffmpeg error splitting into individual encoded frames

  19 avril 2021, par Vainmonde De Courtenay

  I have a folder of .png images I wanted to make a series of .h264 frames (one frame per .png). The frames are named frame001.png, frame002.png, ...

  


  First inside the folder containing the .png files I ran

  


  ffmpeg -r 10 -i frame%3d.png -codec libx264 -r 10 video.h264 -y


  


  which did its job, generating one video.h264. But now I want to divide that into many smaller .h264 files. Following this advice I tried

  


  ffmpeg -i video.h264 -f image2 -vcodec copy -bsf h264_mp4toannexb frame%03d.h264


  


  but I hit error

  


  [image2 @ 0x55d2fc1f7b20] Application provided invalid, non monotonically increasing dts to muxer in stream 0: -2 >= -2


  


  Full console debug :

  


  # ffmpeg -i video.h264 -f image2 -vcodec copy -bsf h264_mp4toannexb fr%03d.h264
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, h264, from 'video.h264':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p(progressive), 480x852, 10 fps, 10 tbr, 1200k tbn, 20 tbc
Output #0, image2, to 'fr%03d.h264':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p(progressive), 480x852, q=2-31, 10 fps, 10 tbr, 10 tbn, 10 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[image2 @ 0x55d2fc1f7b20] Application provided invalid, non monotonically increasing dts to muxer in stream 0: -2 >= -2
frame=   28 fps=0.0 q=-1.0 Lsize=N/A time=00:00:02.50 bitrate=N/A speed=1.58e+03x    
video:142kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown


  


  I have tried the problem with multiple videos and the same thing. In fact when I check, the new files do appear. But they aren't really .h264's (just a few bytes large - appear to be ghost files) and I'm guessing this is down to the error displayed above.

  


• как сделать 8 d музыку -> ffmpeg [closed]

  3 janvier 2023, par имя фамилия

  Всех приветствую, подскажите как через ffmpeg создать трек 8D
8D музыка это - метод постобработки аудиозаписи, когда диджеи берут уже существующий трек и микшируют его, создавая эффект движения звука вокруг слушателя.
По сути, 8D-аудио эмулирует звучание surround-формата Ambisonics. Последний подразумевает, что слушатель находится в центре «акустической сферы», по краям которой расставлены источники звука. (на одном форуме спросил что такое 8D)

  


  Писал на форуме, там не знаю решения, пробовал найти в открытых источниках, но видимо таким вопросом не задавались

  


• Using batch, how would you iterate through an array that you don't know how many values it may contain to run a function on each individual variable

  10 mai 2017, par Jay1995

  I have a batch file creating an array of variables it gets from a textfile, as follows :

  for /f "skip=1 tokens=9 delims= " %%a in (%findfile%) do set "_%%a=yes"
  
  set count = 0
  
  for /f "tokens=1* delims==#" %%b in ('set _') do (
  
      set /a count+=1
  
      set x=%%b
  
      set location[!count!]=!x:~1!
  
  )
  
  set %location%

  I’m trying to get each variable from the array to be looped into a function individually, but have no idea how to do it !!

  The location array storing all the variables has to be called into a for loop and the function I’m trying to get it to loop into is an FFMPEG function :

  for %%i in (%location%\*.mp4) do (if not exist "%%~ni\" MD "%%~ni"
  
  
  
      ffmpeg -i "%%i" -vframes 1 -f image2 -start_number 0 
  
      "%%~ni\%%~ni_Summary_%%3d.jpeg"
  
  
  
  )

  All HELP would be greatly appreciated