VSE: frozen frames after simple edit/cut in final render #103818
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Reference: blender/blender#103818
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System Information
Operating system: Ubuntu 22.04 and Windows 11
Graphics card: Ubuntu: nvidia RTX3070, Windows: Intel UHD Graphics 620
Blender Version
Broken: 3.4.1, Current Alpha
dd9e1eded0
Worked: not sure, maybe 2.93
Short description of error
After a simple edit/cut I often see freeze frames at the beginning of the next clip. When using 100% proxies, the frames are not frozen but they are frozen in final render! I waited for #95683 to arrive in stable but I still experience glitches. As mentioned, using proxies does not help since freeze frames are in the final render.
Exact steps for others to reproduce the error
open .blend and examine the cut. There are 3 frozen frames. They are also in my final render (attached). Compare the cut with proxies activated to see what the cut would look like without freeze frames.
MushroomTutorial_Schnitt04_FreezeFrames.blend
MVI_7752.MP4
MushroomTutorial_Schnitt04_FreezeFrames.mp4
BL_proxy.zip
Added subscriber: @Michael-47
Added subscriber: @iss
Added subscriber: @PratikPB2123
Changed status from 'Needs Triage' to: 'Confirmed'
Hi, thanks for the report. Can confirm this behavior in preview window but unable to confirm it in final render
Hi! I tried it (again) on my two machines (win and ubuntu) and also using another output format. the freeze frames are always in it.
I was able to fix the broken file by putting the source video into a subfolder and relinking it in the vse by pointing to the new location in the source property or by using find missing files (both work). weird but maybe it helps...
I am not able to reproduce at all. At what timeline frame this issue can be found?
Since I am on Windows, I relinked videos in beginning, but I think
C:\mnt\...
will work there so will re-check.I saw sample render, also checked with exact path, but I did not download proxies yet. With proxies I can reproduce. The issue seems to be within timecode index. I will check this more in detail, as it is related to cut position which should not happen.
Ultimately I wanted to remove timecodes completely, because they are causing more issues than they are solving now, so fix may be removal of this system. For now you can disable them by using "None" option in proxy panel.
ok, by selecting none for timecodes or disabling the proxies the issue was fixed as well. that's way better than moving the files around. thanks! i do not need proxies, it was just to improve performance a little.
This issue was referenced by
a5c3f5b0bc
Changed status from 'Confirmed' to: 'Resolved'
I have looked into index file building and process is as follows:
Technically in parallel to that runs building process with varying delay:
If this delay is greater than GOP size, which in this case is, this process will fail. Fortunately frames carry over data from packets, so this can be fixed.
Please check this with alpha build from https://builder.blender.org/download/daily/, existing proxies have to be rebuilt though, since they are already "corrupted".
I opened my broken edit with blender-3.5.0-alpha+master.cc332264ae07-linux.x86_64-release from 15th january. After recalculating the proxies the freeze frames where gone. For preview and also for final render. It was just a quick test but it seems to be fixed.