[mythtv-users] Quicktime 1080p mov files smoother than 720p mkv (Debian)

[Raymond Wagner]

Nick Rout wrote:
> x264 - core 67 r1127M 8d82fec - H.264/MPEG-4 AVC codec - Copyleft
> 2003-2009 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
> deblock=1:-2:-1 analyse=0x3:0x113 me=umh subme=6 psy_rd=1.0:0.0
> mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0
> deadzone=21,11 chroma_qp_offset=-2 threads=6 nr=0 decimate=1 mbaff=0
> bframes=3 b_pyramid=1 b_adapt=1 b_bias=0 direct=3 wpredb=1 keyint=250
> keyint_min=25 scenecut=40 rc=2pass bitrate=3502 ratetol=1.0 qcomp=0.60
> qpmin=10 qpmax=51 qpstep=4 cplxblur=20.0 qblur=0.5 ip_ratio=1.40
> pb_ratio=1.30 aq=1:1.00
>   
That file is CABAC at 3.5mbps, meaning it will use about as much power 
to decode as CAVLC at 5mbps.  Anything generated by Quicktime will be 
CAVLC.  Some other bits of interest:

ref=3
       The more reference frames you have, the more buffer memory you 
need to store them during decoding.  Hardware decoders usually cannot 
handle more than a handful of these.  Three should be fine.

b_pyramid=1
       X264 encoding profiles I've seen for hardware decoders tend to 
have this disabled, and I know my PS3 won't play files with this 
enabled, but VDPAU seems to play them just fine.