[Libva] Decoding artefacts

[Xiang, Haihao]

> 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.

I also reproduced this issue with the new sample. It seems it is the
same issue of https://bugs.freedesktop.org/show_bug.cgi?id=40820. Here
is the patch https://bugs.freedesktop.org/attachment.cgi?id=51444 for
this issue. Could you give a try ?  

Thanks
Haihao


> 
> 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 ?
> >>>> >> >>
> >>>> >> >>         _______________________________________________
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> >>>> >> >>         Libva at lists.freedesktop.org
> >>>> >> >>         http://lists.freedesktop.org/mailman/listinfo/libva
> >>>> >> >>
> >>>> >> >>
> >>>> >> >> _______________________________________________
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> >>>> >>
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