[mythtv-users] [old] Re: XvMC and libmpeg2 to be dropped in 0.25
Kevin Kuphal
kkuphal at gmail.com
Thu Feb 10 18:16:41 UTC 2011
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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