[FFmpeg-devel] [PATCH] avcodec/tiff: Add support for recognizing DNG files

[Michael Niedermayer]

On Tue, Mar 19, 2019 at 03:03:20AM +0200, Nick Renieris wrote:
> Yes, obviously this is not complete. As was said, the DNG spec is huge
> and I did bring up this concern in a personal email to Paul a few days
> ago.
> I was told that:
> > 3 months should be enough to finish most of specification, note you work on real world DNG files, so if some feature from spec is not present in any file you have less work to do
> which I absolutely agree with.
> The context of my contribution in this case is GSoC, so let's talk
> about that: Wouldn't it be better if by the end of GSoC, FFmpeg could
> open all or most of the DNG files that actually exist out there,
> instead of having only specific parts of the spec implemented
> thoroughly?

Theres no need to implement every feature, but what
FFmpeg supports should work.
For example if we support audio and video demuxing from mpeg-ps
and support audio and video muxing in mpeg-ts we should be able
to convert one to the other with both audio and video.

Similarly if we support demuxing "auxilary / secondary or what they
are called images" and muxing then we should be able to connect these
and not just be able to extract one image.
Thats the ideal. The question how to implement this, or if this is
the way to go or if this is too complex to do is up to the mentor
for a GSoC project.
It could be done by spliting into streams at the demuxer level, by
using side data or decoding the images in sequence in the decoder
or other ways. Each of these seem to have disadvanatges ...

Thanks

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

"I am not trying to be anyone's saviour, I'm trying to think about the
 future and not be sad" - Elon Musk

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