Sorry about the long delay! I've reproduced the behavior with h264 (e.g. from Youtube) and mpeg2 videos, while webm (not accelerated) works fine. The behavior is identical on my desktop (submitted the bug report from there, X.Org radeon driver, native vdpau, vaapi emulation) and laptop (X.Org intel driver, native vaapi).
Parole plays the same h264 and mpeg2 videos without problems if gstreamer1.0-vaapi is not installed.
Sorry about the long delay! I've reproduced the behavior with h264 (e.g. from Youtube) and mpeg2 videos, while webm (not accelerated) works fine. The behavior is identical on my desktop (submitted the bug report from there, X.Org radeon driver, native vdpau, vaapi emulation) and laptop (X.Org intel driver, native vaapi).
Parole plays the same h264 and mpeg2 videos without problems if gstreamer1.0-vaapi is not installed.