Video speed is incorrect when proxies are used #90350

New Issue

Ajay Biswas · 2021-08-01T07:02:34+02:00

Ajay Biswas commented

2021-08-01 07:02:34 +02:00

System Information*
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: AMD Radeon (TM) R5 M335 ATI Technologies Inc. 4.5.13586 Core Profile Context 19.12.2 26.20.15002.61

Blender Version
Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: 1b8d33b18c
Worked: (newest version of Blender that worked as expected)

Exact steps for others to reproduce the error
F10261830

Import the video on the timeline
build proxies

play

It will play at around 2x speed, which is incorrect.

*System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: AMD Radeon (TM) R5 M335 ATI Technologies Inc. 4.5.13586 Core Profile Context 19.12.2 26.20.15002.61 **Blender Version** Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: `1b8d33b18c` Worked: (newest version of Blender that worked as expected) **Exact steps for others to reproduce the error** [F10261830](https://archive.blender.org/developer/F10261830/video4_3.mp4) - Import the video on the timeline - build proxies # play It will play at around 2x speed, which is incorrect.

Ajay Biswas commented

2021-08-01 07:02:34 +02:00

Added subscriber: @ajaybiswas

Richard Antalik commented

2021-08-02 19:03:06 +02:00

Added subscriber: @iss

Richard Antalik commented

2021-08-02 19:03:06 +02:00

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

Richard Antalik commented

2021-08-02 19:03:06 +02:00

Can you upload movie file here as well? I suspect this would be seek bug

Ajay Biswas commented

2021-08-03 07:05:58 +02:00

video4_3.mp4 Sure. This is the movie file. Try splitting it multiple times.

[video4_3.mp4](https://archive.blender.org/developer/F10261830/video4_3.mp4) Sure. This is the movie file. Try splitting it multiple times.

Richard Antalik commented

2021-08-03 23:41:59 +02:00

This will be fixed in 2.93.2 which is release candidate now, but you can download it from https://builder.blender.org/download/daily/

However with proxies this file doesn't work correctly in current master. There are more seek bugs fixed, will have to check if this issue is covered. I think this is new bug. So I will update report a bit and confirm so we can investigate.

This will be fixed in 2.93.2 which is release candidate now, but you can download it from https://builder.blender.org/download/daily/ However with proxies this file doesn't work correctly in current master. There are more seek bugs fixed, will have to check if this issue is covered. I think this is new bug. So I will update report a bit and confirm so we can investigate.

Richard Antalik changed title from ~~Video plays two times after splitting it during video editing~~ to Video speed is incorrect when proxies are used

2021-08-03 23:44:13 +02:00

Richard Antalik commented

2021-08-03 23:44:13 +02:00

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

Richard Antalik commented

2021-11-04 03:30:35 +01:00

Checked cause of this problem - it's "caused" by a68f5456e4 but that is because timecodes are not used after this patch which is correct behavior. Even though it's not very great as default.

Solution to this issue is to enable timecodes.
More automatic solution could be to enable timecodes when enabling proxies, but since this can be done manually this maybe isn't best option.
Since 2.93 also frame PTS is not stored in proxy movie file. But even this is fixed it (try using file built with previous versions) doesn't resolve the issue immediately. But I think it should be possible to copy PTS in a way, that proxy file is treated same way as original during decoding. that would be best solution.

This needs to be investigated in bit more detail, so will classify as known issue, which should be looked at in near future.

Checked cause of this problem - it's "caused" by a68f5456e48 but that is because timecodes are not used after this patch which is correct behavior. Even though it's not very great as default. Solution to this issue is to enable timecodes. More automatic solution could be to enable timecodes when enabling proxies, but since this can be done manually this maybe isn't best option. Since 2.93 also frame PTS is not stored in proxy movie file. But even this is fixed it (try using file built with previous versions) doesn't resolve the issue immediately. But I think it should be possible to copy PTS in a way, that proxy file is treated same way as original during decoding. that would be best solution. This needs to be investigated in bit more detail, so will classify as known issue, which should be looked at in near future.

Richard Antalik commented

2022-11-15 22:17:45 +01:00

Changed status from 'Confirmed' to: 'Archived'

Richard Antalik closed this issue

2022-11-15 22:17:45 +01:00

Richard Antalik commented

2022-11-15 22:17:45 +01:00

Seems that this has been resolved already, so will close.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Video speed is incorrect when proxies are used #90350

play