[4.6.4] Post-processing large > 4GB MP4 files leads to corrupted file

[bartosej]

I need to capture screen of our built app. Short captures are OK but the longer ones result in a corrupted file.

• Unity version: 2020.3.10f1
• AVPro Movie Capture version: 4.6.4
• Operating system version: Windows 10 Home - 20H2, 19042.1288
• Capture component used: CaptureFromScreen
• Capture settings (resolution, frame-rate, codec):
  - Realtime
  - StartTriggerMode.Manual
  - StopMode.None
  - OutputTarget.VideoFile
  - CaptureBase.DownScale.Original
  - FrameRate = 30
  - VideoCodec = H264

To Reproduce
I have ran our application, the capturing is started automatically after some event in the app. After cca 26 minutes the capturing was automatically stopped (also reaction on some event) and the application waited on FileWritingHandler.IsFileReady() before exit of the application. I am waiting on it like:

Logs
No error was thrown. AVPro logs from log file:

[AVProMovieCapture] Init version: 4.6.4 (plugin v4.6.4) with GPU NVIDIA GeForce GTX 1060 6GB Direct3D 11.0 [level 11.1] OS: Windows 10 (10.0.19042) 64bit
[AVProMovieCapture] Start File Capture: 1920x1080 @ 30,00fps [RGBA32] vcodec:'H264' to file: 'D:\test\Route_80206.mp4'
....
[AVProMovieCapture] Stopping capture 0
....
[AVProMovieCapture] File processing complete

Screenshots

The details tab is completely empty, no info about mp4 at all.

[kahnivore]

Hi @bartosej

1. Have you tried with the latest version, 4.7.1?
2. Are you handling the shorter captures in exactly the same way?
3. The 'test' folder you're saving the video to, is that a folder outside of the Unity project?

[bartosej]

Hi @kahnivore

1. Have you tried with the latest version, 4.7.1?

I have updated the plugin to latest 4.7.1 -> unfortunately the result is still the same.
[AVProMovieCapture] Init version: 4.7.1 (plugin v4.7.1) with GPU NVIDIA GeForce GTX 1060 6GB Direct3D 11.0 [level 11.1] OS: Windows 10 (10.0.19042) 64bit
[AVProMovieCapture] Start File Capture: 1920x1080 @ 30,00fps [RGBA32] vcodec:'H264' to file: 'D:\test\Route_35850.mp4'

2. Are you handling the shorter captures in exactly the same way?

Yes, I am attaching some screenshots of two files (Route_35850.mp4 is OK). The capturing (starting, exiting application included) executes in the same way.

3. The 'test' folder you're saving the video to, is that a folder outside of the Unity project?

Yes, but I do not run the app from the editor. I run compiled and built app. It looks like the location of the target directory does not affect the result (in case of shorter recording is everything ok).

[AndrewRH]

Are you building a 64-bit app? 32-bit might have problems with such large file sizes (over 4GB)

[bartosej]

@AndrewRH Yes, we are building the app for windows as 64-bit.

[AndrewRH]

Thanks. I wonder whether it's the post-operations that's trashing the file. Could you try turn off the 3 post-operation (fast-start, stereo, 360 layout)?

Thanks,

[bartosej]

@AndrewRH

I have turned off all (three) post-operations and the video file is not broken anymore.

I'll send it to testers for more testing but it seems that one of these operations is corrupting the file.

[AndrewRH]

thanks @bartosej that's a great lead! I will do some testing to try to reproduce the issue so we can fix it. If I'm not able to reproduce it I may ask you for your video file...

hopefully will have a solution soon.