Bug#667573: x264: 10 bit builds

Nicolas George nicolas.george at normalesup.org
Wed Jan 16 14:46:39 UTC 2013

Le septidi 27 nivôse, an CCXXI, Sebastian Dröge a écrit :
> I don't think this change makes sense as is. x264 built with 10 bit
> support does not accept raw 8 bit video and vice versa (and has to be
> configured differently), and x264 build with 10 bit support does only
> support different h264 profiles than the 8 bit version.

That is true, but that is for the calling application to worry.

>							  And these 10 bit
> profiles are usually not supported by hardware decoders.

That is for the users to decide, this is not a choice a packager is entitled
to impose.

> Software currently uses the #defines in x264_config.h to get the
> capabilities of the library at build time. If suddenly the library gets
> replaced by one with different build parameters, software will stop
> working correctly because of that.

That is not true. I can not vouch for all applications out there, but I can
confirm that the most important one works perfectly well under these

> Ideally x264 would allow using different bit depths in the same build,

This world is not perfect.

> or at least a different soname should be used for the resulting library.

That would prevent changing the library at run time with just an environment
variable, as has already been stated.


  Nicolas George
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