playbin3 picking wrong h265 decoder

[Nirbheek Chauhan]

Hi Bill,

Running gstreamer is documented here:
https://gstreamer.freedesktop.org/documentation/gstreamer/running.html?gi-language=c

Cheers,
Nirbheek

On Thu, Dec 29, 2022 at 5:45 AM Bill Hofmann via gstreamer-devel
<gstreamer-devel at lists.freedesktop.org> wrote:
>
> Works like a charm, thanks. Decode is now smooth as butter. Is there a place where this (and other env variables) are documented?
>
> -Bill
>
> On Wed, Dec 28, 2022 at 1:07 PM Nicolas Dufresne via gstreamer-devel <gstreamer-devel at lists.freedesktop.org> wrote:
>>
>>
>>
>> Le mer. 28 déc. 2022, 15 h 15, Bill Hofmann via gstreamer-devel <gstreamer-devel at lists.freedesktop.org> a écrit :
>>>
>>> Folks:
>>>
>>> On 1.21.3, with a build that I have verified includes vah265dec, with a graph that looks like:
>>>
>>> playbin3 uri="http://127.0.0.1/foo.m3u8"
>>>     video-sink="kmssink name=kmssink0 connector-id=308 plane-id=31 skip-vsync=true"
>>>     audio-sink="volume name=volume0 volume=0.01 ! alsasink name=alsa device=plughw:CARD=PCH,DEV=3"
>>>
>>> I note that it looks like avdec_h265 is getting picked for the decoder, and it is having problems keeping up with the stream. I know (from a hand-built graph) that the VA versions keep up reasonably well (4k h265 Main10 L5.1 stream).
>>>
>>> I recall that there was some way of changing priorities of different plugins, but for the life of me, can't find out where that is documented.
>>>
>>> Any hints?  Perhaps this belongs somewhere in the decodebin/playbin docs?
>>>
>>> Gonna be moving to uridecodebin3, for other reasons, but I expect I'd have the same problem there.
>>
>>
>> This is the new VA plugin, we are just an air from being able to deprecate the old one, meanwhile, you have to rank it. From command line (hopefully I got the env name right):
>>
>> export GST_PLUGIN_FEATURE_RANK=vah265dec:9999
>>
>> Nicolas
>>
>>>
>>> -Bill
>
>
>
> --
> Bill Hofmann
> +1 510 387-0952