VCE dual instance encoding inconsistent since st/va: enable dual instances encode by sync surface
Submitted by Andy Furniss
Assigned to Default DRI bug account
Bit late with this one, but I didn't notice initially. It seems there is some timing/sync issue on R9285 with dual instance enabled after
c59628d1 st/va: enable dual instances encode by sync surface
Testing with large rawvideo/higher bitrates lucked me out of noticing initially as visually these tend to be OK, though making say 20 and md5summing them will show inconsistencies. I can change the number of "bads" in some tests by flipping my cpus between cpufreq on_demand and perf.
At lower sizes/bitrates/transcoding it's possible to get corruption, either in the form of some runs giving abnormally low bitrate with vbr, or sometimes with cbr there is a chance of an out of order frame around an IDR frame.
Testing this with gstreamer.