[FFmpeg-user] kmsgrab on Intel 8th generation aka h/w accelerated screen capture

[Kai Hendry]

Thanks for the sudo setcap cap_sys_admin+ep /path/to/ffmpeg tip. It
indeed works.

https://github.com/kaihendry/recordmydesktop2.0/commits/kms

Unfortunately kmsgrab seems to lag for me:
https://s.natalian.org/2018-06-26/1529976937.mp4

And sometimes is unreliable:
https://s.natalian.org/2018-06-26/moov-atom-not-found.log (leaving me
with an unplayable file)

I guess screen capture to mp4 is just too risky.

The most reliable method for screen capturing on Archlinux for me is:
1) https://github.com/kaihendry/recordmydesktop2.0/blob/nodrop/x11capture to mkv
2) https://github.com/kaihendry/recordmydesktop2.0/blob/nodrop/htmlvideo
to get that mkv to mp4

Really was hoping to get it to one step and leverage my 8th gen Intel
gizmos. Sigh.

Or is there some other format that is safe to record to that FCPX will
be able to grok even if abruptly terminated?