Re: [FFmpeg-devel] FFmpeg 5.0

[Michael Niedermayer <michael@niedermayer.cc>]

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On Mon, Oct 31, 2022 at 02:03:21PM +0100, Anton Khirnov wrote:
> Quoting Neal Gompa (2022-10-30 22:04:42)
> > On Sun, Oct 30, 2022 at 4:10 PM Michael Niedermayer
> > <michael@niedermayer.cc> wrote:
> > >
> > > On Sat, Oct 29, 2022 at 02:29:56PM -0400, Neal Gompa wrote:
> > > > On Fri, Oct 28, 2022 at 2:23 PM Michael Niedermayer
> > > > <michael@niedermayer.cc> wrote:
> > > > >
> > > > > Hi
> > > > >
> > > > > According to our
> > > > > https://trac.ffmpeg.org/wiki/Downstreams
> > > > >
> > > > > Noone and nothing is using 5.0
> > > > > should i make another release of 5.0 ?
> > > > > should i move 5.0 to olddownloads ?
> > > > >
> > > > > does anyone use it ? plan to use it or know of someone using it ?
> > > > >
> > > >
> > > > Fedora 36 still uses FFmpeg 5.0 as I discovered there was an ABI break
> > > > that made upgrading to FFmpeg 5.1 not possible for F36. FFmpeg 5.1 is
> > > > used for Fedora 37, though.
> > > >
> > > > This had apparently been also discovered by openSUSE some time ago:
> > > > https://build.opensuse.org/package/view_file/multimedia:libs/ffmpeg-5/work-around-abi-break.patch?expand=1
> > >
> > > You can replace 5.0 by 5.1 but not 5.1 by 5.0, The compatibility is only
> > > in one way.
> > > Iam assuming here you talk about the addition of functions and there is
> > > not some other issue iam not aware of.
> > >
> > 
> > My understanding is that when using symbol versions, modifying the
> > symbol table creates a breakage on its own.
> 
> Do you have some authoritative source for this claim? So far all the
> arguments I've seen were along the lines of "because I say so".

Or in absence of this, a testcase that shows some sort of anomaly when a
global/static symbol is added to C source code.

thx

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

I am the wisest man alive, for I know one thing, and that is that I know
nothing. -- Socrates

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