Videos recorded from a mac build is blue tinted

[NavigateByCloud]

Hey!
I tried to make a build on mac from this project. I'm using Unity 2018.4.32. And the videos recorded in the build are all blue tint. Meanwhile, videos recorded from the editor look normal. I suspect the pixel format argument mismatches render texture format somehow. I tried changing the pixel format from "rgba" to "bgra" but it becomes red-tinted. "bgra64be" it becomes green-tinted.

Besides, I got errors in the player log:

[rawvideo @ 0x7ffa80808200] Packet too small (3)
Error while decoding stream #0:0: Invalid data found when processing input

or

FFmpeg returned with warning/error messages. See the following lines for details:
[rawvideo @ 0x7fb75f008200] Invalid buffer size, packet size 8294403 < expected frame_size 16588800
Error while decoding stream #0:0: Invalid argument

Do you have any idea what causes blue tinted? Any insight on that would be quite helpful!

Thank you!

Vanilla

[alxdncn]

As a test, I ran through all the different -pixel_format for ffmpeg by changing the command line option specified in FFmpegSession.cs. I also tried cycling through the different color formats for the render texture. Neither gave me the results I was looking for.

[cdg720]

i am also getting this problem with a linux build

OS: Ubuntu 20.04
Unity editor: 2020.3.31f1

update: ok it works fine in editor play but comes out tinted blue with build play

[cdg720]

#44 fixes the problem for me

[DerThomy]

In case anyone else stumbles upon this. The underlying issue is that when the ffmpeg Subprocess is started in the FFmpegPipe constructor using Process.Start, the StandardInputEncoding of ProcessStartInfo is not set explicitly which means that the default .NET encoding is used, which is UTF8 mostly. But more importantly UTF8 encoding can be configured to use a Byte Order Mark (BOM) which for UTF8 prepends 3 bytes for every write (EF BB BF - https://en.wikipedia.org/wiki/Byte_order_mark). This leads to the whole image being shifted by 3 bytes and therefore the blue shift occurs and the Packet too small error. Funnily, the fix proposed kind of solves this problem as interpreting the image as ARGB instead of RGBA results in correct colors again but what isn't immediately noticeable is that the whole image is now shifted by 1px to the right. The proper way to solve the issue is to set
StandardInputEncoding = new System.Text.UTF8Encoding(encoderShouldEmitUTF8Identifier: false) in the ProcessStartInfo.