Playback / preview regressions

[mifi]

This is a mother issue regarding multiple playback / preview issues that surfaced in LosslessCut 3.65.0 (that did not exist in 3.64.0).

Here's the notable changes that are most likely to have caused this:

• Electron upgraded
  • from 31.3.1 (Chrome M126, Node v20.14)
  • to 35.0.1 (Chrome M134, Node v22.14)
• FFmpeg upgraded from 6.0 to 7.1

Observations

Reproducible problems on my computer.

Playing back remuxed video fails

Playing back video from #2364 (comment)) works in Electron 34.4.1 (latest v34) or earlier but does not work in Electron 35.0.0 or later. Also in Google Chrome (macOS) it does not work. Gives the error:

MediaError {
  code: 3,
  message: 'PIPELINE_ERROR_DECODE: Failed to send video packet for decoding: {timestamp=0 duration=40000 size=5496 is_key_frame=0 encrypted=0}',
}

Because it also gives the same error in Chrome, it should be a Chromium regression.

Seek slowdown

Seeking and playing back certain videos slows down in Electron v33.0.0 and later (works as of 32.3.3)

• With 3.65, navigating to the end of the file, will not update image or show the last frame. #2369
• Seeking back and forward a frame does not update the preview window (3.65) #2372

macOS MAS build renderer dropout

Whole HTML DOM goes blank while the <video> element is in view. Happens with iPhone HDR videos.
Only happens with Mac App Store signed build. This happens also in LosslessCut 3.64.0