Dear Brian,
Sorry If am repeating the same thing again and again.
My concern is that the advantage gained by using CUDA is lost by several
transfers between GPU and CPU, if I have got your point right.
Is there any way I can hack avformat producer to output only demuxed JPEG
frames to MLT frame struct which can presumably be directed to a consumer
which then upload those frames to GPU within a OpenGL context where CUDA
decoding and OpenGL scaling things going to happen.
I went through avformat producer and could not still able to spot the place
where AVCodec related things like avcodec_decode_video2() is called.
Please help.
What are your advices.
Regards
Sahan
On Fri, Aug 3, 2012 at 9:27 AM, Brian Matherly <[email protected]> wrote:
> >What I expect from MLT is reusing great collection of modules and tap
> into GL consumer which I came across MLT development list for taking care
> of presenting images at consumer.
>
> >Is it possible to adapt avformat in any way that it can produce
> uncompressed JPEG2000 frames destined to consumer.
> >Please shed some light.
> >Thank you very much for your thoughts.
>
>
> I don't see a way to do it. The "great collection of modules" you refer to
> assume that a frame is uncompressed. They wouldn't be able to do anything
> with JPEG2000 frames.
>
> The closest you could get would be:
>
> 1) Create a new producer that uses libavformat to demux the MXF file AND
> uses CUDA to decode the frames. Then you would have a producer that
> provides uncompressed frames like all the other producers.
>
> 2) That new producer could pass the uncompressed frames to a GL consumer
> for render to the screen.
>
> ~BM
>
>
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