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• .NET Wrapper ffmpeg convert to mp4 set size to 1920 x 1080

  1er août 2020, par Robert

  I in my application written in .NET Core I use ffmpeg to convert movie from 3gp to mp4.

  


  var conversionOptions = new ConversionOptions
{
   MaxVideoDuration = TimeSpan.FromSeconds(60),
   VideoAspectRatio = VideoAspectRatio.R16_9,
   VideoSize = VideoSize.Hd1080,
   AudioSampleRate = AudioSampleRate.Hz44100,
   //  CustomWidth = 200
};
                    
await ffmpeg.ConvertAsync(inputFile, outputFileMp4, conversionOptions);


  


  Convertion works fine, but my source movie is from mobile phone. Its frame size is 1920 x 1080 but the movie is higher than wider.
After conversion with above code the frame is the same but the movie is cuted and it is wider than taller.
I wanted to have original size

  


• Picture size 0x0 is invalid : trying to downsample 4k raw video into 1080 using ffmpeg

  25 février 2021, par neetu sigger

  ffmpeg -i CityAlley_3840x2160_50fps_8bit.yuv -vf scale=1920:1080 CityAlly.yuv


  


  But I got the error :

  


  ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[IMGUTILS @ 0x7fffc0509b50] Picture size 0x0 is invalid
CityAlley_3840x2160_50fps_8bit.yuv: Invalid argument


  


• FFMPEG Python : Encountered scale(1920, 1080) with multiple outgoing edges with same upstream label None ; a `split` filter is probably required

  2 janvier, par Lysander Cox

  Here is the code in question :

  


  for comment in thread['comments']:
        commentClips += fragmentConcat(comment, filePrefix)
        
        staticClip = ffmpeg.input('assets/static.mp4')
        commentClips.append(staticClip
                                .filter('setsar', 1, 1)
                                .filter('scale', 1920, 1080)
                           )
        commentClips.append(staticClip.audio)


  


  This code generates the following error :

  


  ValueError: Encountered scale(1920, 1080) <6adb028f8ef5> with multiple outgoing edges with same upstream label None; a `split` filter is probably required


  


  I have tried using only the video part of the input for the first call (e.g. staticClip['v'].filter...), and I have tried using the split call as suggested (e.g. ffmpeg.input(...).split(). Nothing has worked. What is the issue, and how can I rememdy it ? Thanks.