Bug: Invalid output video when using very short video and large number of threads

[nikhiljangra264]

Describe the bug
When using a video that is very short for example 3 seconds and using threads greater then 3 the output video file doesn't run.

To Reproduce
Steps to reproduce the behavior:

1. Using this youtube or any very short video, process
2. Make sure using threads greater than length of video
3. See output video file

Expected behavior
A valid video file

Logs and Debug Information
No error information showed.

System and software (please complete the following information):

• OS: kali-linux
• ffmpeg version 7.0.2-3 Copyright (c) 2000-2024 the FFmpeg developers built with gcc 14 (Debian 14.2.0-2)

Additional context
All settings are default.

[omeryusufyagci]

@nikhiljangra264 thanks for reporting this. I gave it a try and the playback was available in my case. However, the video is cut short perhaps by a second or so. So, indeed it seems we have an issue for very short videos, but I was not able to reproduce the problem exactly as you described.

[nikhiljangra264]

I guess you run in docker.
When i run in docker no issue occured It only occur when i run manually.
When I'm making unit test cases.