[Nouveau] VDPAU DEINTERLACE

[Ilia Mirkin]

Mesa only supports the non-spatial temporal deinterlace (deint=3). I'm
guessing that due to some unfortunate issues, you're no longer getting
hw accelerated video decoding. Check in vdpauinfo to make sure that
it's indeed showing the relevant codec as supported. If not, you can
turn that back on by updating to mesa 11.2.2, or downgrading your
kernel to 4.2 or earlier. (The issue only affects G98 and MCP77/MCP79
IGPs.)

If you are, in fact, getting hw video decoding acceleration, then it
could be that your GPU is clocked too low. You could attempt
reclocking to a higher pstate and seeing what happens.

  -ilia


On Thu, May 5, 2016 at 1:12 AM, poma <pomidorabelisima at gmail.com> wrote:
>
> NVIDIA G98
> mesa-dri-drivers-11.2.1-2.20160501.fc22.x86_64
> (incl. mesa commit 38fcf7c)
>
>
> vdpauinfo | grep -i deint
> DEINTERLACE_TEMPORAL             y
> DEINTERLACE_TEMPORAL_SPATIAL     -
>
>
> https://cgit.freedesktop.org/vdpau/libvdpau/tree/include/vdpau/vdpau.h#n3420
> #define VDP_VIDEO_MIXER_FEATURE_DEINTERLACE_TEMPORAL         ((VdpVideoMixerFeature)0)
> /**
>  * \hideinitializer
>  * \brief A VdpVideoMixerFeature.
>  *
>  * When requested and enabled, this enables a more advanced
>  * version of temporal de-interlacing, that additionally uses
>  * edge-guided spatial interpolation.
>  *
>  * When multiple de-interlacing options are requested and
>  * enabled, the back-end implementation chooses the best
>  * algorithm to apply.
>  */
> #define VDP_VIDEO_MIXER_FEATURE_DEINTERLACE_TEMPORAL_SPATIAL ((VdpVideoMixerFeature)1)
> /**
>  * \hideinitializer
>  * \brief A VdpVideoMixerFeature.
>  *
>  * When requested and enabled, cadence detection will be enabled
>  * on interlaced content and the video mixer will try to extract
>  * progressive frames from pull-down material.
>  */
>
>
> https://cgit.freedesktop.org/vdpau/libvdpau/tree/include/vdpau/vdpau.h#n606
>  * \subsection deint_adv Advanced De-interlacing
>  *
>  * Operation of both temporal and temporal-spatial de-interlacing is
>  * identical; the only difference is the internal processing the algorithm
>  * performs in generating the output frame.
>  *
>
>
> man 1 mplayer
> ...
> vdpau (X11 only)
> ...
> deint=<-4-4>
> ...
>        Select deinterlacing mode (default: -3). Positive  values
>        choose mode and enable deinterlacing. Corresponding nega‐
>        tive values select the same deinterlacing  mode,  but  do
>        not enable deinterlacing on startup (useful in configura‐
>        tion files to specify what mode will be  enabled  by  the
>        "D" key). All modes respect --field-dominance.
>
>        0      same as -3
>
>        1      Show only first field, similar to --vf=field.
>
>        2      Bob deinterlacing, similar to --vf=tfields=1.
>
>        3      motion  adaptive  temporal deinterlacing. May lead
>               to A/V desync with slow video hardware and/or high
>               resolution.
>
>        4      motion   adaptive   temporal   deinterlacing  with
>               edge-guided  spatial  interpolation.  Needs   fast
>               video hardware.
>
>
> Reading all this, am I correctly concluded,
> what is supported within NVIDIA G98 HW is DEINTERLACE_TEMPORAL,
> which should be engaged with Mplayer's 'vdpau:deint=4' option?
>
> Then again, what DEINTERLACE_TEMPORAL_SPATIAL represents?
> As reading the 'vdpauinfo' output it should not be supported.
> Is it associated with Mplayer's 'vdpau:deint=3' option,
> which in turn works, so to speak?
>
> mplayer -vo vdpau:deint=[34] -vc ffmpeg12vdpau dvb://2@DVBT
>
> Although they achieve solid deinterlacing result,
> vdpau:deint=3 and vdpau:deint=4 tend to produce:
>
> ************************************************
> **** Your system is too SLOW to play this!  ****
> ************************************************
>
> Rest of the deinterlacing modes - 1 and 2, are not so great.
>
>
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