Waveform appears seemingly at random

[xrstf]

The fewer issues I have to read, the more new features I will have time to implement, so I ask that you please try these things first

• Try with the newest version from GitHub (also it might have already been fixed in latest nightly build)
• Read the documentation and FAQ, Known issues, Troubleshooting
• Search for your problem under Issues or Discussions
• If you have a problem only with a particular file (or file type), use this form instead
• Windows 7, 8 and 8.1 are no longer supported. This is not a question about Windows 8.1 or older.

Operating System

Windows 10

Steps to reproduce

1. Open a video file (mkv with x265 in my case)
2. Click "Show waveform". A bar like this appears as expected:

3. Zoom in (either via mousewheel or the zoom buttons in the status bar)

Expected behavior

At some zoom level, the audio waveform should appear consistently.

Actual behavior

When zooming in, the bar for the waveform just disappears entirely. I can zoom in and out an in and move back and forth and only when losslesscut feels like it, will it seemingly at random actually show the waveform again.

waveform.mp4

Is this maybe losslesscut still loading? Or what could be the reason I have to wait / click around randomly? Would there be a chance to include a loading indicator on the waveform bar to let me know that/if something is going to happen?

Sometimes when clicking around, the entire waveform bar just disappears and I get errors like

but I guess those errors are from me clicking around fast.

Share log from developer tools

No response

[mifi]

i couldn't reproduce it right now, but there could be a bug there yes

[xrstf]

My video files are ~1.5GB per file, stored on an internal HDD. Video is x265 and the audio streams are DTS / Vorbis.

[shalex28]

Would like to add: There is no waveform shown for my file of around 100MB in TS Format. But waves do appear for this my file exported in MP4 or Matroska.

[shalex28]

p.s. zooming had no effect

[mifi]

can you try the nightly build?
edit: is it possible that your TS file has multiple audio tracks, and waveform is shown for the first track (which might be silent?)

[shalex28]

1. no there are only 2 tracks - one for video one for audio
   

[shalex28]

2. yes I tried https://github.com/mifi/lossless-cut/actions/runs/8859012902 and the result was the wave panel without waveform.
   

[shalex28]

before applying the build there was no wave panel at all

[shalex28]

I want to thank you anyway for the great software! I finished my small family video with help of it!

[mifi]

alright. probably a bug in ffmpeg. unfortunately i cannot reproduce the problem with a TS file (waveform works for me)