Re: [xine-user] DXR3 sync report

[Michael R. <ama...@fr...>]

Hi Harm,

> > > I'm wondering if sync is better if you reverse the order; i.e.
> > > first write to the device, then do a SETPTS. The em8300 doc is a
> > > bit vague on the right order.
> > I tested this, but unfortunately it has no effect.
> Too bad, though I didn't expect too much of it (after all, a one
> frame sync adjustment wouldn't fix the problems I've seen).

I've had another idea when you told me that you fix it with the 'n' and 
'm' keys: As the A/V offset I am experiencing seems constant, why not 
setting av_offset to a suitable value during init? (Maybe the DXR3 card 
has a built in frame delay to ensure the em8300 has enough processing 
time?) I've enclosed a patch that really works wonderful for me.

Another thing I noticed when checking that: The descriptions of the 'n' 
and 'm' keys in the manpage should be the other way round.

> Unfortunately, the dxr3 decoder (like many software decoders as well)
> can't just drop frames. Dropping frames for the dxr3 decoder would
> mean sending parts of the stream to the trashcan instead of the
> hardware decoder. Since in mpeg (as in most video compression
> formats) each image can depend on the image before (or after) it, it
> would corrupt the output until the next keyframe.

Sure, I didn't think far enough.
But then: What the hell is xine doing when he tells me "video_out : 
throwing away image ..." during DVD playback?

> > 2. MPEG1 playback via DXR3 is broken. Audio is way too fast. It
> > sounds like double speed.
>
> I will investigate these items. I don't have any mpeg1 streams handy,
> but luckily this week I'm moving to a place with broadband internet
> access, so I'll be able to download all I want :-)
>
> By the way, have you tested mpeg1 playback using the Xv (or XShm)
> driver and libmpeg2?

Yes, works just fine.

> > Sorry for filling your TODO list.
>
> Not exactly what I would want to find in my christmas stocking, but
> there it is..

I'll try to be quiet know...

Michael Roitzsch