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• FFmpeg Error : Output file does not contain any stream [closed]

  27 octobre 2023, par 2nd Ethan

  I'm trying to use FFmpeg to split an audio file into segments, but I'm encountering the following error :

  


  Output file #0 does not contain any stream


  


  The code is generated automatically using DDSP-SVC notebook.

  


  subprocess.run(f'ffmpeg -i "{filepath}" -f segment -segment_time {sep_duration_final} "{out_filepath}" -y', capture_output=True, shell=True)


  


  Here's the command I'm using :

  


  ffmpeg -i "preprocess/norm\a.wav" -f segment -segment_time 12 "data/train\audio\a-%04d.wav" -y


  


  I have a few questions regarding this issue :

  


  


  1. What does this error message mean, and why is it occurring ?

     


  


  2. How can I resolve this error and successfully split my audio file into segments ?

     


  


  


  Any insights or guidance on troubleshooting this FFmpeg error would be greatly appreciated.

  


  I have tried running the FFmpeg command provided in my question to split an audio file into segments.

  


  I expected this command to successfully create a series of segmented audio files in the 'data/train\audio' directory.

  


  However, I encountered the 'Output file #0 does not contain any stream' error, and no output files were generated.

  


• ImgFlip Gif Generator

  30 juillet 2013, par user1960364

  Reference : http://imgflip.com/gifgenerator

  So, I don't need the web UI and all the cusomizations. But I've been trying to figure out how to slice and convert a mp4 or mov to an animated gif automagically. I've looked at several ways of doing it with imagemagick/ffmpeg but none of them rendered results as good as imgflip. I always end up with some 24bit color-looking gif instead or some impractically large file.

  Any suggestions/ideas on how to do it as efficiently as imgflip ?

  Thanks :)

  — Edit —
  I found this on reddit :

  #!/bin/bash
  
  
  
  # Extracts each frame of the video as a single gif
  
  ffmpeg -i $1 out%04d.gif
  
  
  
  # Combines all the frames into one very nicely animated gif.
  
  convert -delay 4 out*.gif anim.gif
  
  
  
  # Optimizes the gif using imagemagick
  
  convert -layers Optimize anim.gif optimized_output.gif
  
  
  
  # Cleans up the leftovers
  
  rm out*
  
  rm anim.gif 

  Using that, I created (and yes, I'm on windows) :

  ffmpeg -i v.mp4 -r 10 -q:v 1 tmp/out%04d.jpg
  
  convert -delay 10 tmp/out*.jpg jpg-d10.gif
  
  echo y | del tmp

  And got decent quality, even this creates an 8MB file for a small 6sec 480x480 clip at 10fps. And because it's a video and not vector or series of images with very few colors, extracting jpg images does better compression than -layers Optimize. However, for some reason, -qscale/-q:v on the frame extraction does not effect the final file size, just the quality.

• Fix frame-packing==5 with some decoders

  18 juin 2014, par Tal Aloni

  Fix frame-packing==5 with some decoders
  The spec mandates that frame-packing==5 requires the SEI on every frame that
  
  begins a view sequence (i.e. the input frames L0-R0-L1-R1 have 4 view sequences,
  
  but if reordered by the encoder to L0-L1-R0-R1 there are now 2 view sequences).
  
  For simplicity, we write the SEI on every frame.
  This fixes frame-packing==5 3D playback on some decoders (PlayStation 3, Sony
  
  W8 series, possibly others).
  

  • [DH] encoder/encoder.c
  • [DH] encoder/set.c