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

Nick Rout nick.rout at gmail.com
Fri Apr 3 22:30:23 UTC 2009


On Sat, Apr 4, 2009 at 11:19 AM, Jongi <jongitech at gmail.com> wrote:
>
>
> On Fri, 2009-04-03 at 17:16 -0400, Raymond Wagner wrote:
>
> Robert McNamara wrote:
>> 2009/4/1 Jongi <jongitech at gmail.com>:
>>
>>> However when I run 720p mkv files there is some jerkiness.
>>>
>>
>> What bitrate and encoding options did you use when
>> encoding the MKV?  Is it CABAC h.264?  higher bitrate than 2-3 Mbit?
>>
> If you used x264, there should be an identifier block at the beginning
> of the raw stream.  It should still show up near the beginning of the
> matroska file.  Open the file with 'less' and look for something like
> "x264 - core 58 - H.264/MPEG-4 AVC codec - Copyleft 2003-2008 -
> http://www.videolan.org/x264.html", followed by a bunch of variables.
> Post that block in here.

> I really am not sure what it is you are asking me to do. I tried less
> filename.mkv but that i think is not the output you are talking about


strings filename.mkv|grep core

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

thanks for that tip Raymond, interesting


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