limit video helper meta data to the modes we will need

[totaam]

Issue migrated from trac ticket # 2226

component: encodings | priority: major | resolution: wontfix

2019-03-20 04:21:14: antoine created the issue

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Typically, on Linux with X11 we will only need BGRX so there is no need to keep track of the conversions to and from BGR, RGB or RGBX, etc

[totaam]

2019-03-21 12:01:16: antoine changed status from new to closed

[totaam]

2019-03-21 12:01:16: antoine set resolution to wontfix

[totaam]

2019-03-21 12:01:16: antoine commented

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Too difficult, most combinations are valid, they're just not very useful.

ie: when we have BGRX to h264 using x264 (or nvenc) then that's what we'll use, but going via YUV420P and a CSC step is also a valid option (which uses less bandwidth and CPU). We never want to use XRGB to h264, because that would require a BGRX to XGRB CSC step, but we don't know in advance that there are going to be better options..