id summary reporter owner description type status priority milestone component version severity resolution keywords cc mlocked 10832 Use QtKit for playback on mac by default not VDA... adamfowleruk@… "According to the apple developer site, QtKit should be used for H264 playback, not VDA. Also VDA support varies by model. Apple recommend using QtKit for playback. ""The Video Decode Acceleration framework only decodes video frame data and does not provide video playback or stream parsing capabilities. Using the QTKit QTMovie object with QTMovieOpenForPlaybackAttribute enabled is the recommended way for applications to automatically access GPU accelerated playback of H.264 encoded media."" See Notes on Overview section here: Technical note TN2267 Video Decode Acceleration Framework Reference https://developer.apple.com/library/mac/#technotes/tn2267/_index.html#//apple_ref/doc/uid/DTS40009798 This may also resolve issues on MythFrontend on Mac with the kernel panic issue, and thus disabled VDA playback on 0.25, causing jittering. My system: MacbookPro 17"" mid 2009 NVidia GeForce 8600M GT 512MB VRAM Intel Core 2 Duo 2.6GHz Playback CPU results (all for HD H264 interlaced stream): OpenGL High ~ 136% VDA High ~ 113% OpenGL Normal, Open GL Slim, VDA Normal, VDA Slim ~ 103% (I'm assuming the VDA modes actually use OpenGL instead because the stream is interlaced, as per info on 0.25 build in mythtv trac) Let me know if I'm crazy / stupid / you need more information. Would have submitted this as a feature request but didn't see that option." Bug Report - General closed minor 0.25.1 MythTV - Video Playback 0.25.1 medium Invalid mac 0