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

[Nick Rout]

On Sat, Apr 4, 2009 at 11:48 AM, Raymond Wagner <raymond at wagnerrp.com> wrote:
> 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.

Thanks, interesting. Of course I was just giving an example, I am not
the OP, just showing the OP how to get the information :)