question on video decoder based on V4L2 M2M

[Nicolas Dufresne]

Le 2015-03-04 21:00, Bing Song a écrit :
>
> Hi,
>
> I have some question on video decoder based on V4L2 M2M. can you help?
>
> video decoder will have two pool. one for V4L2 decoder input and one 
> for V4L2 decoder output. right?
>
> V4L2 decoder only open one video decoder device? and can support input 
> and output streaming at the same time? The only differential input and 
> output is V4L2 buffer type?
>
> Is it transfer buffer between driver and user space using QUEUE and 
> DEQUEUE in normal driver?
>
> V4L2 decoder read/writer not very common in today's driver?
>
> For V4L2 decoder API, is it enough for video decoder/encoder setting? 
> such video compress format and many decoder/encoder setting.
>
> is it works for multi-instance? how about seek and eos process?
>
I tried to explain it last year at GST Conference, hopefully that will help:
http://gstconf.ubicast.tv/videos/the-development-of-video4linux-decoder-support/
>
>
Nicolas