vaapih264enc and x264enc usage for encoding MVC / stereo?

[Víctor M. Jáquez L.]

On 01/26/17 at 06:25pm, Sreerenj Balachandran wrote:
> set "num-views=2" to vaapih264enc
> 
> On Thu, Jan 26, 2017 at 6:22 PM, Jérôme Carretero <cJ-gst at zougloub.eu>
> wrote:
> 
> > Hi,
> >
> >
> > Did not get a reply... is there any documentation available or I should
> > dig in the code?

Oops! Sorry, this thread slip out of my head.

As Sree already replied, with the property num-views you should set MVC
encoding.

Could you comment this issue in bug

https://bugzilla.gnome.org/show_bug.cgi?id=757941 ???

To keep it in mind.

Thanks

vmjl

> >
> >
> > Thanks,
> >
> > --
> > cJ
> >
> >
> > On Wed, 28 Dec 2016 17:49:37 -0500
> > Jérôme Carretero <cJ-gst at zougloub.eu> wrote:
> >
> > > Hi Víctor,
> > >
> > >
> > > (adding Jan because I saw
> > > https://gstreamer.freedesktop.org/data/events/gstreamer-
> > conference/2015/Jan%20Schmidt%20-%20Stereoscopic%203D%20Redux.pdf)
> > >
> > >
> > > Yes, the hardware supports MVC encoding (intel SkyLake).
> > > Definitely the fact that the downstream caps weren't used wasn't
> > > helping there.
> > >
> > > After some further Googling based on your hint “MVC encoding is
> > > selected is if the number of views in upstream is equal or bigger
> > > than 2”, I found in the glstereomix docs the
> > > "multiview-mode=side-by-side" which is added at the output of
> > > glstereomix.
> > >
> > >
> > > Because I already have mixed video in one of my cases (top-bottom or
> > > left-right), so I tried:
> > >
> > >   ! ... \
> > >   ! video/x-raw,format=I420,multiview-mode=side-by-side \
> > >   ! vaapih264enc \
> > >   ! h264parse ! ...
> > >
> > > But to no avail.
> > >
> > >
> > > Is the StereoHigh encoder expecting these side-by-side buffers, and
> > > I'm missing "metadata", or does it prefer to use separate buffers?
> > >
> > >
> > > To "reproduce" a similar situation:
> > >
> > > # Get a random SBS video on youtube, I believe it's clearly fair use
> > >
> > > youtube-dl EgD5_7u2NvQ
> > > mv *EgD5_7u2NvQ*.mp4 sbs.mp4
> > >
> > > # Attempt to recompress using StereoHigh
> > >
> > > gst-launch-1.0 --verbose --no-fault \
> > >  filesrc location=sbs.mp4 \
> > >  ! qtdemux name=demux \
> > >  demux.audio_0 ! queue ! fakesink \
> > >  demux.video_0 \
> > >  ! queue name=q_dec\
> > >   ! h264parse \
> > >   ! avdec_h264 \
> > >   ! vaapipostproc \
> > >  ! queue name=q_enc \
> > >   ! video/x-raw,format=I420,multiview-mode=side-by-side \
> > >   ! vaapih264enc \
> > >   ! h264parse \
> > >   ! mp4mux fragment-duration=1000 \
> > >   ! filesink location=test-stereohigh.mp4
> > >
> > > GST_DEBUG=GST_CAPS:5 gst-launch-1.0 \
> > >  filesrc location=test-stereohigh.mp4 ! qtdemux ! h264parse !
> > > fakesink \
> > >  2>&1 | grep stream-format | head -n 1
> > >
> > > # video/x-h264, parsed=(boolean)true, stream-format=(string){ avc,
> > > avc3, # byte-stream }, alignment=(string){ au, nal }
> > >
> > >
> > > Regards,
> > >
> >
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> >