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• Is there any way to combine PNGs as a Quicktime-compatible MP4 from FFMPEG ?

  12 avril 2020, par griffin2000

  Is there any way to get combine PNGs as a Quicktime-compatible MP4 from FFMPEG ?

  



  I'm using this command currently :

  



  ffmpeg -i frame%03d.png -pix_fmt yuv420p  output.mp4


  



  This is the video works fine in VLC and can be uploaded to Youtube/Vimeo/Facebook fine but Quicktime complains that it "cannot be opened" :


  



  A few questions (e.g. https://apple.stackexchange.com/questions/166553/why-wont-video-from-ffmpeg-show-in-quicktime-imovie-or-quick-preview) about this at various sources, but none of the answers seem to work and they all seem to boil to down to some variant of "use yuv420p" or a couple of other flags. None of which seems to work. Apparently it may have changed in later (post-Yosemite) versions of MacOS ?

  



  So what (if anything) is the magic incantation that make this work with later versions of Quicktime ?

  



  Thanks all

  



  ffprobe output below FYI :

  



  ffprobe version 4.2.2 Copyright (c) 2007-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  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
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/xxx/Downloads/output (14).mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
  Duration: 00:00:02.72, start: 0.000000, bitrate: 677 kb/s
    Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 1714x1630, 672 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler


  


• OpenCV build keeps failing with errors related to ffmpeg [closed]

  23 juillet 2024, par Aterox_os

  I am trying to install OpenCV on a Raspberry PI 4 with Raspbian Version 12. The default method via pip didnt work it kept failing to build the wheel. So I tried to install it manully.
I followed this guide. I change the swap size to 1024mb. I also tried to run just make without the -j4 parameter. But it didnt work. According to the error it seems like its an issue with the naming of the ffmpeg codec.
I could disable disable ffmpeg in the cmake command but I assume its fairly important for an computer vision library.
How can I fix it ?

  


  Here is the log of the cmake command (The same one as in the guide except WITH_QT=ON) :
Cmake log
And here is the make log :
Make log

  


  As mentioned I tried increasing the swap size and instead of running make -j4 I just ran make. I also tried the normal installation via pip install opencv-python. I also tried installing it with and without a virtual environment.

  


• FFMpeg with IOS app approval ?

  15 avril 2015, par Mahavir

  I have used FFmpeg library for the video encoding app. my app rejected and got the message from the apple team.

  Apps may not use protected third party material such as trademarks,
  copyrights, patents or violate 3rd party terms of use. Authorization
  to use such material must be provided upon request

  Please provide documentary evidence of rights to use this content.
  Once Legal has reviewed your documentation and confirms its validity,
  we will proceed with the review of your app.

  Is there any way to approve my app.

  Please Please give me good suggestion. I don’t know what to do.