vaapidecode parse error handling

[Víctor M. Jáquez L.]

On 01/11/17 at 10:25am, Matt Staples wrote:
> I'm using 1.8.2.  I didn't realize vaapidecode was later ditched.
> What's the replacement?

The decoders were split: vaapih264dec, vaapimpeg2dec, etc.

But there is still the vaapidecodebin which is, basically, the vaapidecode +
vaapipostproc.

vmjl

> 
> I've attached a log showing the parse error.
> Note that this includes a hack that I made to issue a
> GST_ELEMENT_ERROR prior to returning EOS.  (When our application sees
> the stream error, it rebuilds the pipeline using the libav decoder,
> and after that it, it streams without any errors.)
> I'll work on capturing the actual offending data, but that will take a
> bit as it's actually difficult to access outside of our application.
> 
> 
> On Wed, Jan 11, 2017 at 8:37 AM, Víctor M. Jáquez L. <vjaquez at igalia.com> wrote:
> > On 01/11/17 at 07:33am, Matt Staples wrote:
> >> Hi All,
> >>
> >> I ran into a problem with vaapidecode, where it failed to handle an
> >> H264 stream due to a parse error on an SEI packet.  The upstream
> >> h264parser element complained about the packet, but otherwise let it
> >> through with a warning.  But then vaapidecode printed a debug error
> >> message about it and then returned GST_FLOW_EOS.
> >
> > Which version of gstreamer-vaapi are you using? vaapidecode was ditched in
> > gstreamer 1.10
> >
> >> Two questions:
> >> 1. Is there a chance vaapidecode is parsing too strictly?  (The
> >> software decoder plays the same stream without any apparent problems.)
> >> 2. Is GST_FLOW_EOS really the desired behavior?  Our application can't
> >> distinguish this from a proper end-of-stream condition, and therefore
> >> can't effectively handle the error, e.g., by switching over to the
> >> software decoder and trying again.  I would think a GST_ELEMENT_ERROR
> >> (streaming feature) would be more appropriate in this case.
> >
> > Can you share a log? GST_DEBUG=vaapi*:5
> > If you have a sample media would be great.
> >
> > vmjl
> >
> > _______________________________________________
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> > gstreamer-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel


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