Splitted movie clips show wrong section #91264

New Issue

Antti Salo · 2021-09-08T21:06:58+02:00

Antti Salo commented

2021-09-08 21:06:58 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.96

Blender Version
Broken: version: 2.93.4, branch: master, commit date: 2021-08-31 09:23, hash: b7205031ce
Worked: (newest version of Blender that worked as expected)

Short description of error
T9051Q continues to happen. Making a split makes preview show wrong time section of the footage. The anomalies go away when loading the blender file again (file provided anyway). It has 2 main modes of happening. The misplaced footage might start at the sigh of the previous cut and then after 1-2 seconds returns where it is supposed to be. Or it might flicker between delayed and correct in various ratios.

How it manifests https://youtu.be/vBmjyTU1hTY

0001-1435.mp4

2021-09-08 21-27-32.mkv

cut_bugs.blend

Exact steps for others to reproduce the error
Capture footage
Import clip
Shift+k to make a cut in the middle
observe that preview has jumped or playback to verify flicker

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.96 **Blender Version** Broken: version: 2.93.4, branch: master, commit date: 2021-08-31 09:23, hash: `b7205031ce` Worked: (newest version of Blender that worked as expected) **Short description of error** T9051Q continues to happen. Making a split makes preview show wrong time section of the footage. The anomalies go away when loading the blender file again (file provided anyway). It has 2 main modes of happening. The misplaced footage might start at the sigh of the previous cut and then after 1-2 seconds returns where it is supposed to be. Or it might flicker between delayed and correct in various ratios. How it manifests https://youtu.be/vBmjyTU1hTY [0001-1435.mp4](https://archive.blender.org/developer/F10386798/0001-1435.mp4) [2021-09-08 21-27-32.mkv](https://archive.blender.org/developer/F10386799/2021-09-08_21-27-32.mkv) [cut_bugs.blend](https://archive.blender.org/developer/F10386800/cut_bugs.blend) **Exact steps for others to reproduce the error** Capture footage Import clip Shift+k to make a cut in the middle observe that preview has jumped or playback to verify flicker

Antti Salo commented

2021-09-08 21:06:58 +02:00

Added subscriber: @Shalkka

Dave commented

2021-09-09 04:08:54 +02:00

Added subscriber: @dave9828

Dave commented

2021-09-09 04:08:54 +02:00

It only happened when editing. If you render the video it doesn't lag. 0001-1435.mp4

It only happened when editing. If you render the video it doesn't lag. [0001-1435.mp4](https://archive.blender.org/developer/F10389142/0001-1435.mp4)

Evan Wilson commented

2021-09-09 11:29:23 +02:00

Added subscriber: @EAW

Evan Wilson commented

2021-09-09 11:29:23 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Evan Wilson commented

2021-09-09 11:29:23 +02:00

It looks like the first frame of the cut displays the previous cached ‘first’ frame of the strip. If you turn on cache visibility, does it show the glitched frames as already cached?

https://docs.blender.org/manual/en/latest/video_editing/sequencer/navigating.html#bpy-types-sequenceeditor-show-cache

It looks like the first frame of the cut displays the previous cached ‘first’ frame of the strip. If you turn on cache visibility, does it show the glitched frames as already cached? https://docs.blender.org/manual/en/latest/video_editing/sequencer/navigating.html#bpy-types-sequenceeditor-show-cache

Antti Salo commented

2021-09-09 13:21:54 +02:00

The highlighted parts seems to be "final images" and are the correct ones. The dull areas are where there is incorrect footage. The flicker also matches the punctuation of the cache indicator (maybe with a delay but atleast in pattern). Also playing it over and over will retain the same parts of cache indicator (ie it is constant under rewind and play) when I understood it should work towards it all being highlighted.

![flicker_bug.png](https://archive.blender.org/developer/F10390618/flicker_bug.png) The highlighted parts seems to be "final images" and are the correct ones. The dull areas are where there is incorrect footage. The flicker also matches the punctuation of the cache indicator (maybe with a delay but atleast in pattern). Also playing it over and over will retain the same parts of cache indicator (ie it is constant under rewind and play) when I understood it should work towards it all being highlighted.

Raimund Klink commented

2021-11-04 11:57:09 +01:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Richard Antalik commented

2022-02-18 21:39:58 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-02-18 21:39:58 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2022-02-18 21:39:58 +01:00

@Shalkka Sorry for late response, I have missed this report. If I recall correctly in #90510 I assumed the issue was that proxies were built, but not used, and due to incorrect default timecode setting this issue happened. I am not 100% sure, whether this is the case though.

Issues with timecodes was fixed by eab066cbf2, and this should be rectified in future even further by not needing timecode files at all, but this is not implemented yet. In addition there were other fixes that may or may not apply for this case.

Can you check if this happens with latest alpha build from https://builder.blender.org/download/daily/? Please check if you can reproduce starting with blank VSE template as timecode settings are not changed for older files.

@Shalkka Sorry for late response, I have missed this report. If I recall correctly in #90510 I assumed the issue was that proxies were built, but not used, and due to incorrect default timecode setting this issue happened. I am not 100% sure, whether this is the case though. Issues with timecodes was fixed by eab066cbf2, and this should be rectified in future even further by not needing timecode files at all, but this is not implemented yet. In addition there were other fixes that may or may not apply for this case. Can you check if this happens with latest alpha build from https://builder.blender.org/download/daily/? Please check if you can reproduce starting with blank VSE template as timecode settings are not changed for older files.

Antti Salo commented

2022-02-27 01:09:00 +01:00

I tried to reproduce the issue with alpha build ac3f4db719 Could not reproduce, seemed to work fine. Same video file being cut in 3.0.1 dc2d180181 does reproduce so there is definite improvement/fix between the versions.

I tried to reproduce the issue with alpha build ac3f4db71945 Could not reproduce, seemed to work fine. Same video file being cut in 3.0.1 dc2d18018171 does reproduce so there is definite improvement/fix between the versions.

Richard Antalik commented

2022-02-28 21:33:59 +01:00

Changed status from 'Needs User Info' to: 'Archived'

Richard Antalik closed this issue

2022-02-28 21:33:59 +01:00

Richard Antalik commented

2022-02-28 21:33:59 +01:00

Thanks for update, will close then.

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Splitted movie clips show wrong section #91264