[Libva] Decoding artefacts

[alanwww1]

I was able to reproduce the problem on mplayer (1.0+svn32819-3 built
on 2011.10.22.). It looks a lot better than in xbmc, but macroblocking
is definatelly there.

One important thing I noticed. If I seek into any position of the
movie. The is NO macroblocking at that position, where is a lot of
macroblocking when I play it back normally from an earlier position.
This info could be important. Here are the screenshots:

macroblocking screenshot in mplayer:
http://img716.imageshack.us/img716/3643/screenshotmlpayer.png
macroblocking screenshot in xbmc:
http://img830.imageshack.us/img830/152/screenshot007zs.png
screenshot seeking into position xbmc:
http://img714.imageshack.us/img714/6767/screenshot006tj.png

Please, libva devs, could you please help ?

Thx,

Alan

2011/12/26 alanwww1 <alanwww1 at gmail.com>:
> So it is for sure that the problem is not in xbmc I guess, but in
> ffmpeg or libva.
>
> Can you check the version or build date of the arch linux mplayer package ?
>
> Just for the libva devs as an info that the problem also exists in
> mplayer and not only in xbmc.
>
> Thanks.
>
> ps.:
> I am also trying to build a fresh mplayer on Ubuntu to confirm.
>
>
>
> 2011/12/26 gimli <gimli at dark-green.com>:
>> I use the archlinux distribution packages. For ffmpeg tests i use my xine
>> vaapi implementation.
>>
>> On Mon, 26 Dec 2011 18:30:47 +0100, alanwww1 <alanwww1 at gmail.com> wrote:
>>> Hi Gimli !
>>>
>>> As i know that is only working with earlier mplayer builds. If you
>>> check out a fresh build with
>>>
>>> git clone -b hwaccel-vaapi git://git.gitorious.org/vaapi/mplayer.git
>>>
>>> You can only have the -vo option. -va is depricated as I understand.
>>>
>>> What version have you compiled or from which git repository ?
>>>
>>> I am really stuck getting a working vaapi enabled mplayer on my system.
>>>
>>> Thx
>>>
>>>
>>> 2011/12/26 gimli <gimli at dark-green.com>
>>>>
>>>> Did you try run vaapi mplayer with :
>>>>
>>>> mplayer -vo vaapi -va vaapi file.mkv ?
>>>>
>>>> On Mon, 26 Dec 2011 12:03:43 +0100, alanwww1 <alanwww1 at gmail.com> wrote:
>>>> > Hi Haihao !
>>>> >
>>>> > Thanks for the help !
>>>> >
>>>> > I tried to backport the only commit that has something to do with
>> vaapi
>>>> > h264 decoding. I applied this to internal xbmc ffmpeg. The internal
>>>> ffmpeg
>>>> > is dated february 2011. So this is the only commit which is not in it:
>>>> >
>>>> >
>>>>
>> http://git.videolan.org/?p=ffmpeg.git;a=commit;h=3fec40b601827e75aae9f0baa47671af15de181a
>>>> >
>>>> >
>>>> >
>>>> > Compiles fine, but the same marcroblocking artifacts. Unfortunately I
>>>> > am
>>>> > not able to run a vaapi enabled mplayer to test that. See my post
>> about
>>>> > this problem:
>>>> >
>>>> > http://lists.freedesktop.org/archives/libva/2011-December/000734.html
>>>> >
>>>> > So I have not ideahow to solve this.
>>>> >
>>>> >
>>>> > 2011/12/26 gimli <gimli at dark-green.com>
>>>> >
>>>> >> Here is my sample where you can see my issue.
>>>> >>
>>>> >> http://www.megaupload.com/?d=T9KYT771
>>>> >> http://www.megaupload.com/?d=R0SAJ8EY
>>>> >>
>>>> >> Sorry. Didn't find a better place for the smales.
>>>> >>
>>>> >>
>>>> >> On Mon, 26 Dec 2011 16:21:55 +0800, "Xiang, Haihao"
>>>> >> <haihao.xiang at intel.com>
>>>> >> wrote:
>>>> >> > On Mon, 2011-12-26 at 01:11 +0100, alanwww1 wrote:
>>>> >> >> Hello Gimli !
>>>> >> >>
>>>> >> >>
>>>> >> >> I have the same problem on Intel Sandy Bridge. I tested with xbmc
>>>> >> >> and
>>>> >> >> latest libva and intel driver. But it is the same with older
>>>> >> >> drivers.
>>>> >> >>
>>>> >> >>
>>>> >> >> Here are some screenshots:
>>>> >> >> http://img607.imageshack.us/img607/841/screenshot004u.png
>>>> >> >> http://img85.imageshack.us/img85/6752/screenshot003g.png
>>>> >> >>
>>>> >> >> And here is the sample video.
>>>> >> >>
>>>> >> >>
>>>> >> >> http://jkft.info/xbmc/testfiles/h264_macroblocking/2012-sample.mkv
>>>> >> >>
>>>> >> >>
>>>> >> >> Would be good if libva devs can confirm this. If it is maybe an
>>>> >> >> already known problem.
>>>> >> >
>>>> >> > I can't reproduce this issue with the latest mplayer-vaapi and VLC.
>>>> >> > I didn't test xbmc because I failed to build xbmc on my machine,
>> but
>>>> >> > I
>>>> >> > noticed xbmc uses an internal FFmpeg library by default. Is that
>> the
>>>> >> > reason why you have artifacts in XBMC ?
>>>> >> >
>>>> >> > Thanks
>>>> >> > Haihao
>>>> >> >
>>>> >> >
>>>> >> >
>>>> >> >
>>>> >> >>
>>>> >> >>
>>>> >> >> Thanks, Alan
>>>> >> >>
>>>> >> >>
>>>> >> >> 2011/12/25 gimli <gimli at dark-green.com>
>>>> >> >>         I have seen decoding artefacts with some h264 streams.
>>>> >> >> Latest
>>>> >> >>         ffmpeg and
>>>> >> >>         mplayer-vaapi.
>>>> >> >>         Where can i stick a sample file and an image which shows
>>>> >> >> the
>>>> >> >>         artefact ?
>>>> >> >>
>>>> >> >>         _______________________________________________
>>>> >> >>         Libva mailing list
>>>> >> >>         Libva at lists.freedesktop.org
>>>> >> >>         http://lists.freedesktop.org/mailman/listinfo/libva
>>>> >> >>
>>>> >> >>
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>>>> >>