Encoded video fps is wrong #88568

New Issue

Sebastian Parborg · 2021-05-25T16:06:58+02:00

Sebastian Parborg commented

2021-05-25 16:06:58 +02:00

System Information
Operating system: Gentoo Linux
Graphics card: AMD 580

Blender Version
Broken: master
Worked: 2.93

Short description of error
After we moved to the new non deprecated encoding/decoding ffmpeg APIs, ffmpeg encoded videos would sometimes have the wrong FPS.
This is a issue with older ffmpeg versions, so we need to bump our minimal ffmpeg version to 4.4.

Exact steps for others to reproduce the error
export_testing_2.blend

Open the provided .blend file
Render out the video
See that the video file does not have a FPS of 24.0

FPS can be checked from command line with: ffprobe /tmp/0101-0111.mp4

**System Information** Operating system: Gentoo Linux Graphics card: AMD 580 **Blender Version** Broken: master Worked: 2.93 **Short description of error** After we moved to the new non deprecated encoding/decoding ffmpeg APIs, ffmpeg encoded videos would sometimes have the wrong FPS. This is a issue with older ffmpeg versions, so we need to bump our minimal ffmpeg version to 4.4. **Exact steps for others to reproduce the error** [export_testing_2.blend](https://archive.blender.org/developer/F10141323/export_testing_2.blend) 1. Open the provided .blend file 2. Render out the video 3. See that the video file does not have a FPS of 24.0 FPS can be checked from command line with: `ffprobe /tmp/0101-0111.mp4`

Sebastian Parborg commented

2021-05-25 16:06:58 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2021-05-25 16:07:26 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Sybren A. Stüvel commented

2021-05-25 17:55:27 +02:00

Added subscriber: @dr.sybren

Sybren A. Stüvel commented

2021-05-25 17:55:27 +02:00

I can confirm this is fixes by linking against FFmpeg 4.4.

blender-admin commented

2021-05-25 19:02:21 +02:00

This issue was referenced by None@62628

Ray molenkamp commented

2021-05-25 19:55:02 +02:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2021-05-25 19:55:02 +02:00

~~I have the windows libs ready, but during testing i hit a snag, i'm not seeing a difference between 4.3.2 and 4.4~~ scratch that, used a too old build for testing 4.2.3 that did not have the issue yet, can confirm 4.2.3 was bad, and 4.4 fixes the issue on windows.

c:\tmp>ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate 0101-0111_423.mp4
24/1

c:\tmp>ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate 0101-0111_44.mp4
24/1

~~I have the windows libs ready, but during testing i hit a snag, i'm not seeing a difference between 4.3.2 and 4.4~~ scratch that, used a too old build for testing 4.2.3 that did not have the issue yet, can confirm 4.2.3 was bad, and 4.4 fixes the issue on windows. ``` c:\tmp>ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate 0101-0111_423.mp4 24/1 c:\tmp>ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate 0101-0111_44.mp4 24/1 ```

blender-admin commented

2021-05-25 21:19:42 +02:00

This issue was referenced by None@62629