Playblasting in Farm Batch mode (question about color management)

[Juan Cristóbal Quesada]

I work as a pipeline TD and i wanted to see if someone has encountered the same problem that is puzzling me since some days now. Something that shouldnt be that tricky. Here it goes: we are playblasting in our farm some maya files through a python script i did some time ago. After some problems with the graphics cards etc we managed to make it work correctly. But now there is only one final step: color management. The color spaces of the playblast done in maya gui and the one done in maya batch mode doesnt match. In Maya GUI the rendering space is set to "linear sRGB" and the view transform is set to "sRGB gamma". Tried to replicate the same configuration in maya batch mode but it doesnt work and my assumption is that because there is no Opengl context initialized some functions that are available on GUI mode, arent on Batch mode. So now im getting to the point of trying to make a video conversion with ffmpeg and specifying the input and output colorspace of the files. But if i ffprobe the maya GUI playblast file it says "color_space unknown, color_primaries unknown, color_range unknown"

reading the ffmpeg doc i need to know whats the input movie colorspace so i can apply the correct convresion

searched autodesk documentation for a while to see if it says somewhere what are the specs of the playblast (a qt h264 mov file) regarding the colorspace that it is applied but havent found nothing.

[Juan Cristóbal Quesada]

ive done several ffmpeg gamma corrections, notably going from sRGB to linear and the colors are quite there, almost. But there is a slight wash out effect still.

Tried with 2.2 and 1.8. Is it possible that there is a shift in the color primaries?.

Again, all these are just test without knowing the rendering space and gamma of the playblast that Maya is applying in batch mode.