[FFmpeg-devel] Can we drop OpenJPEG 1.5 in favor of 2.x?

Michael Niedermayer michael at niedermayer.cc
Sat Oct 24 19:06:44 CEST 2015

On Sat, Oct 24, 2015 at 09:03:43AM -0700, Michael Bradshaw wrote:
> tl;dr: I've got a patch that updates OpenJPEG to 2.0/2.1. Currently, I've
> opted to drop OpenJPEG 1.5. Should I proceed with preparing this patch for
> submission, or should I alter it to keep 1.5 support?
> ----
> The OpenJPEG API went through a bit of an overhaul in the 1.x to 2.x
> transition. This means that supporting 1.5 and 2.x concurrently in ffmpeg
> would be possible, but would require some (ugly) macros.
> Given that v2.0 was released ~19 months ago, I think it's been long enough
> that users should, most likely, have access to a modern 2.x OpenJPEG on
> their machine. So I don't think dropping 1.5 would be catastrophic.
> But, on the other hand, it's nice to be a swiss army knife that works with
> everything, so I can understand if others think supporting 1.5 is important.
> I don't want to submit my patch (as is) if I'm just going to be told to go
> back and keep 1.5 support. If ya'll still want 1.5 support, I'd rather
> include that from the get-go rather than revising the patch during the
> review.
> Opinions on whether 1.5 should be dropped in favor of 2.x?

If we consider the set of distributions which are supported by their
upstreams still, how many of these ship 2.x and how many an older
OpenJPEG version ?

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

It is dangerous to be right in matters on which the established authorities
are wrong. -- Voltaire
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