Video Import Reference Freezing Frames #99170

New Issue

Alex · 2022-06-25T18:55:57+02:00

Alex commented

2022-06-25 18:55:57 +02:00

System Information
Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: Intel(R) UHD Graphics 620 Intel 4.5.0 - Build 27.20.100.8682

Blender Version
Broken: version: 3.1.2, branch: master, commit date: 2022-03-31 17:40, hash: cc66d1020c
Worked: (newest version of Blender that worked as expected)

Short description of error
When scrubbing through video reference there is times when a frame is frozen for one more frame. This delays the amount frames and goes out of sync with its audio. An example: Frame 1, Frame 2, Frame 2, Frame 3, Frame 4, Frame 4, Frame 5

Exact steps for others to reproduce the error
Import an mp4 or mkv file as reference and scrub thorough the timeline to see

Childe Lost in Japan.blend

**System Information** Operating system: Windows-10-10.0.22000-SP0 64 Bits Graphics card: Intel(R) UHD Graphics 620 Intel 4.5.0 - Build 27.20.100.8682 **Blender Version** Broken: version: 3.1.2, branch: master, commit date: 2022-03-31 17:40, hash: `cc66d1020c` Worked: (newest version of Blender that worked as expected) **Short description of error** When scrubbing through video reference there is times when a frame is frozen for one more frame. This delays the amount frames and goes out of sync with its audio. An example: Frame 1, Frame 2, Frame 2, Frame 3, Frame 4, Frame 4, Frame 5 **Exact steps for others to reproduce the error** Import an mp4 or mkv file as reference and scrub thorough the timeline to see [Childe Lost in Japan.blend](https://archive.blender.org/developer/F13229358/Childe_Lost_in_Japan.blend)

Alex commented

2022-06-25 18:55:57 +02:00

Added subscriber: @Nerodaboi

Alex commented

2022-06-25 19:02:47 +02:00

Not sure what goes here

Pratik Borhade commented

2022-06-28 07:25:51 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-06-28 10:57:47 +02:00

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

Pratik Borhade commented

2022-06-28 10:57:47 +02:00

Hi, hanks for the report. Steps for recreating the issue are not clear to me.
How you're adding video as a reference? From Add panel? {nav Add > Image > Reference}

When scrubbing through video reference there is times when a frame is frozen for one more frame

Did you find this issue in other files as well or in attached file only?
Maybe a screen recording will help to demonstrate the actual problem.

Hi, hanks for the report. Steps for recreating the issue are not clear to me. How you're adding video as a reference? From Add panel? {nav Add > Image > Reference} > When scrubbing through video reference there is times when a frame is frozen for one more frame Did you find this issue in other files as well or in attached file only? Maybe a screen recording will help to demonstrate the actual problem.

Alex commented

2022-06-28 15:01:42 +02:00

Certain frames frozen.mp4

Frozen frames in 2D.mp4

These are the videos

[Certain frames frozen.mp4](https://archive.blender.org/developer/F13234553/Certain_frames_frozen.mp4) [Frozen frames in 2D.mp4](https://archive.blender.org/developer/F13234552/Frozen_frames_in_2D.mp4) These are the videos

Pratik Borhade commented

2022-07-15 09:15:36 +02:00

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

Germano Cavalcante commented

2022-07-18 22:42:08 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-07-18 22:42:08 +02:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Germano Cavalcante commented

2022-07-18 22:42:08 +02:00

I found a video that I could replicate the problem.
F13299578

Theoretically it is 30 fps (higher than 24 fps), so I don't understand why some frames are repeated.
Maybe it's a thing of the video itself.

I'm not sure if it really is a bug.

I found a video that I could replicate the problem. [F13299578](https://archive.blender.org/developer/F13299578/_091440_.mp4) Theoretically it is 30 fps (higher than 24 fps), so I don't understand why some frames are repeated. Maybe it's a thing of the video itself. I'm not sure if it really is a bug.

Richard Antalik commented

2022-11-15 21:36:12 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-11-15 21:36:12 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Needs User Info'

Richard Antalik commented

2022-11-15 21:36:12 +01:00

Sorry for late reply here.
With video file from @mano-wii there is no issue. Even checking with ffmpeg tool ffmpeg -i #99170.mp4 test/out%d.png you can see there are duplicated frames encoded. But even then it is within codec capability to either duplicate frame, or simply not have any frame encoded where it is expected in which case old frame is displayed.

As of f0a3d2beb2, video playback is fetching video frames based on presentation timestamp, so there should be no synchronization issues as long as:

AV sync is enabled (in timeline playback popover menu, this is not enabled by default in General template)
Scene FPS matches movie FPS

@Nerodaboi please check if you meet these conditions. If you do, and you still have issues, please upload movie file.

Sorry for late reply here. With video file from @mano-wii there is no issue. Even checking with ffmpeg tool `ffmpeg -i #99170.mp4 test/out%d.png` you can see there are duplicated frames encoded. But even then it is within codec capability to either duplicate frame, or simply not have any frame encoded where it is expected in which case old frame is displayed. As of f0a3d2beb2, video playback is fetching video frames based on presentation timestamp, so there should be no synchronization issues as long as: - AV sync is enabled (in timeline playback popover menu, this is not enabled by default in General template) - Scene FPS matches movie FPS @Nerodaboi please check if you meet these conditions. If you do, and you still have issues, please upload movie file.

Thomas Dinges commented

2022-12-15 16:54:51 +01:00

Added subscriber: @ThomasDinges

Thomas Dinges commented

2022-12-15 16:54:51 +01:00

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

Thomas Dinges closed this issue

2022-12-15 16:54:51 +01:00

Thomas Dinges commented

2022-12-15 16:54:51 +01:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

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Video Import Reference Freezing Frames #99170