To replicate:

  1. Render a video sequence with an audio strip at the beginning. blender sequencer and settings
  2. Extract the audio from the video file using ffmpeg:

    ffmpeg -i blenderoutput.mp4 audio.wav

  3. Load the audio file in Audacity and look at the first instant in the waveform waveform in audacity

This is not a bug in ffmpeg, I tried it with other videos that have audio throughout, it did not silence the first split second.

Is this a bug in Blender or is there some flag/feature I have to toggle?

  • $\begingroup$ Perhaps Blender is not demuxing correctly, try transcoding the footage to a less compressed codec. $\endgroup$ – 3pointedit Nov 26 '19 at 23:05

Try moving the audio clip in blender so that it starts at frame 1.

To do this, select your audio clip and press g.

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  • $\begingroup$ Oh I did that before. The only reason I moved it to the middle like that is to be certain that its not the beginning of the audio file that is silent. Still the same problem. $\endgroup$ – Yousif Al-Y Nov 23 '18 at 19:38

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