[mythtv-users] [old] Re: XvMC and libmpeg2 to be dropped in 0.25

[Kevin Kuphal]

On Thu, Feb 10, 2011 at 11:22 AM, Jay Foster <jayf0ster at sbcglobal.net>wrote:

> On 2/10/2011 4:00 AM, "Bob Sully"<rcs at malibyte.net> wrote:
>
>> >  Message: 5
>>> >  Date: Tue, 08 Feb 2011 21:17:33 -0500
>>> >  From: Raymond Wagner<raymond at wagnerrp.com>
>>>
>>>> >>  It has an early Intel dual-core Intel CPU, 4G of RAM,
>>>> >>  and an NVidia Quadro 140 video card.  While it*should*  be able to
>>>> do
>>>> >>  VDPAU, it's never been quite there (I have tried just about every
>>>> tweak,
>>>> >>  with different VDPAU profiles (including Slim), but it
>>>> >>  stutters/hesitates,
>>>> >>  and eventually bogs down to the point where it's unusable).
>>>>
>>> >
>>> >  MythTV has never been happy using VDPAU with less than 512MB of
>>> memory.
>>> >  How much have you allocated to the graphics chip?
>>>
>>
>> It reports a total of 512M.  I'm just not sure why it doesn't work...it's
>> supposed to.
>>
>> Bob
>>
>>  Maybe I missed it in this thread, but what does "XvMC and libmpeg2 to be
> dropped in 0.25" really mean?  Does this mean that I will no longer be able
> to play back my MPEG2 videos (DVD and HDHR TV recordings)?  Will doing so be
> possible only with VDPAU?  To me, that seems a bit restrictive.  The
> software decode/playback seems more tolerant of data errors than VDPAU, so
> some (me) prefer it.  It would also lock everyone into a single vendor
> NVIDIA for video cards.  That doesn't seem like the open source MythTV way.
>  Hopefully, this is not what dropping libmpeg2 in 0.25 means.
>

It means exactly what it says.  XvMC will be dropped.  XvMC is a pre-VDPAU
hardware acceleration API supported on some Nvidia cards.  It is not
software decode.  libmpeg2 is also being dropped (or already dropped?) and
that is an *alternative* to the standard ffmpeg software decode in Myth that
was never well-used or supported.  So in 0.25 you will have the option of
software playback (ffmpeg) or hardware (VDPAU or other tech)

Kevin
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