Audio stops working during playback

Bug
1

While editing a specific project, all of a sudden the audio will stop playing when I play the video within Shotcut. It goes as follows:

  1. I open Shotcut, and open a project
  2. I start playing the project - audio works
  3. At some point (after I pause and then start playing again) - I won’t hear any audio. The video still displays, but there is no sound (neither through my speakers nor on the Audio Loudness scope).

Observations:

  • If I don’t pause - play the video from beginning to end - the audio will work for the whole project. But if I pause and / or move the playhead to a different part of the video, the audio stops working.
  • If I reopen the same project (without even restarting Shotcut) the audio works again - but similarly after a little bit (after I pause) the audio won’t be working anymore.
  • Audio stops working for all tracks on the project (audio tracks as well as audio from video tracks).
  • Audio Waveform is still shown on the audio tracks.
  • I even re-installed Shotcut, but no change to the mentioned issue.
  • Other applications can still play audio, it’s only Shotcut.
  • Problem does not come up in past projects, only in current project I am working on.
  • It does not appear to be a resource issue - neither CPU utilization or memory are low.

I did not install any updates to Shotcut or the OS around when this started.

Shotcut: 19.10.20
OS: Windows 10 Home 64 bit (fully updated)

Any help would be greatly appreciated!

2

If you are able to do some experiments, I would suggest:

  1. Save a copy of your project (so you don’t lose your work)
  2. Try removing filters one at a time
  3. Try removing transitions one at a time
  4. Try removing clips one at a time

The best case scenario would be that you could tell us that the problem is caused by one specific thing.

1 Like
3

It seems that this solved the issue! I started with removing all filters (directly in the mlt file), and subsequently the issue was gone. Thanks so much!

4

Were you able to determine which filter was causing the problem?

5

No, because I had about 100 filters in total, and it would not have been feasible to remove them one by one to determine which one caused the issue. The types of filters I had are:
-Mute (Audio)
-Fade in (Audio)
-Fade in / out (Video)
-Gain (Audio)

6

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