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• Adding audio to mp4 using ffmpeg at certain offset gives output file #0 does not contain any stream

  18 mai 2018, par Armand

  I am attempting to add audio to a MP4 file using ffmpeg at a specific time, eventually I also want the audio to only play until a certain point, so if you can help with that also that would be great, otherwise if you can just assist me in figuring out what is causing this error.

  The arguments I use

  -y "E:\Documents\Content Bar/Photo Booth\PhotosDrop\2018-05-15 14-01-16OUT.mp4" -itsoffset  -i "E:\Downloads\wetransfer-250b26\05 Call of Love.mp3" -map 0:0 -map 1:0 -c:v copy -shortest "E:\Documents\Content Bar\Photo Booth\PhotosDrop\2018-05-15 14-01-16OUTOUT.mp4"

  This results in the following error :

  ffmpeg version N-81646-gc19da0c Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55. 29.100 / 55. 29.100
  
    libavcodec     57. 55.101 / 57. 55.101
  
    libavformat    57. 48.103 / 57. 48.103
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 62.100 /  6. 62.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Output #0, mp4, to 'E:\Documents\Content Bar/Photo Booth\PhotosDrop\2018-05-15 14-01-16OUT.mp4':
  
  Output file #0 does not contain any stream

• Where can I find high-quality videos for testing video processing ?

  15 novembre 2012, par Workman

  Aside from Big Buck Bunny, Sintel, and Elephant's Dream, what are other high-quality and free sources for high quality video ?

  I'm using these videos internally to test video transcoding options and am not public redistributing. Any suggestions for content that falls under this category ?

• Combining mp4 with wav in python

  3 janvier 2021, par SaladHead

  I am trying to combine a .mp4 file with a .wav file. I am rendering my mp4 with cv2 videowriter, and I don't think it has anyway of incorporating audio with it. I have tried moviepy.editor, and ffmpeg. moviepy.editor kept messing up the video file and ffmpeg repeatedly kept giving me an error that it couldn't edit existing files in-place. Combining .mp4 with another audio file type is also fine, but if so it would be nice to also answer how to convert midi files to the file type you answered with. Thanks for the help !

  


  moviepy.editor workflow :

  


  video = mpe.VideoFileClip(mp4_path)
os.system(f"timidity {midi_path} -Ow -o {wav_path)}")  # Convert .mid to .wav
video = video.set_audio(mpe.AudioFileClip(wav_path))
video.write_videofile(mp4_path, fps=fps)


  


  ffmpeg workflow :

  


  video = ffmpeg.input(mp4_path)
os.system(f"timidity {midi_path} -Ow -o {wav_path)}")  # Convert .mid to .wav
audio = ffmpeg.input(wav_path)
video = ffmpeg.output(video, audio, path, vcodec='copy', acodec='aac', strict='experimental')
ffmpeg.run(video)