[MPlayer-dvb] Green bands/crashing with filtered DVB.

[Bill Pringlemeir]

> Date: Wed, 9 Jun 2010 23:15:28 +0200 (CEST)
> From: Carl Eugen Hoyos <cehoyos at rainbow.studorg.tuwien.ac.at>
> Subject: Re: [MPlayer-dvb] Green bands/crashing with filtered DVB.

>> I don't know if there is a profile '[dvb]', but I would suggest using
>> this libmpeg2 decoder as it seems more robust in the face of errors.
>
> This should clearly be posted as a patch on mplayer-devel.
> (But I believe it is unlikely that you will find support, but you should
> really try.)

I looked at this briefly.  This is a 'stream' and a profile would need
to be added for a 'stream'.  This would probably allow 'tv://', etc
into a profile as well.  I don't know what the syntax should be.
There is a profile for '[ao.pulse]', '[ao.alsa]', etc.  Should it be
'[stream.dvb]' or '[dvb.channel]'.  I think the first is far easier to
implement.

>> The symptoms are corrupt video and/or crashing.

> I cannot reproduce this (DVB-T/MPEG-2 and DVB-S2/H264).

>> The corrupt video persists for many frames.

> I find this extremely surprising: Error correction is far supperior with
> libavcodec, afair.

I agree.  However, this is a bug and the effects are persistent
sometimes for the entire video.  I believe that the same thing will
happen when using mplayer to view and ATSC stream.

> Allow me to add that I use mplayer to watch dvb nearly daily, and I don't
> know of any decoder issues (I normally use VDPAU, but not always).

I don't think VDPAU will show the issue as the nVidia card will do the
decoding afaiu.  It could also be that 'dvb' as opposed to 'atsc' has
different error properties.  Perhaps the type of atsc error cause the
particular issue within libavcodec.  The bug I have in mplayer
bugzilla should persuade anyone who looks at it that there is an
issue.

For reference,

   http://bugzilla.mplayerhq.hu/show_bug.cgi?id=1613
   http://bugzilla.mplayerhq.hu/show_bug.cgi?id=1039
   http://bugzilla.mplayerhq.hu/show_bug.cgi?id=1588

Regards,
Bill Pringlemeir.