Re: [ITP] ffmpeg (5.1.2)

[Takashi Yano <takashi.yano@nifty.ne.jp>]

On Sat, 4 Feb 2023 16:45:13 +0000
Jon Turney wrote:
> On 24/01/2023 03:28, Takashi Yano via Cygwin-apps wrote:
> >>> Thanks!
> >>>
> >>> For a long time, ffmpeg was not included in Fedora, due to concerns
> >>> about codec patents, but those issues seem to have been resolved.
> >>>
> >>> Can you please investigate what configuration is used in Fedora, and
> >>> what the effects of matching that would be?
> >>
> >> Thanks. I will check the configuration of fedora.
> > 
> > I have checked the configuration of ffmpeg in fedora.
> > It seems that most of codecs are disabled in fedora
> > by default unless 'all_codecs' flag is specified.
> > https://src.fedoraproject.org/rpms/ffmpeg/blob/f37/f/ffmpeg.spec
> > 
> > I have built a ffmpeg package using the configuration
> > almost imitated fedora.
> > https://tyan0.yr32.net/cygwin/x86_64/release/ffmpeg-free/
> > 
> > You would find this ffmpeg of the above configuration is
> > almost unuseful...
> > aac, h264, hevc, mpeg4, wma, wmv, etc. are not supported.
> > 
> > I also imitated the configuration with 'all_codecs' flag
> > and have built another ffmpeg package.
> > https://tyan0.yr32.net/cygwin/x86_64/release/ffmpeg-all_codecs/
> > 
> > This is almost common with the major ports of ffmpeg.
> > 
> > Could you please review them?
> 
> Thanks for looking into this.  The packaging looks fine from a technical 
> standpoint.
> 
> The concern here is that we have an informal policy to only accept 
> packages which is would be allowed in Fedora (by it's policies on 
> content and being free of legal encumbrances (e.g. license, patent and 
> trademark issues))
> 
> After some discussions, it seems that policy should be formal.  I've 
> amended [1] to state that.
> 
> I'm sorry to cause you more trouble, but given that, can you package 
> this based on the codec set in Fedora's ffmpeg-free?

Thank you for your consideration. I have re-arranged the ffmpeg
package basend on Fedora's ffmpeg-free package.

https://tyan0.yr32.net/cygwin/x86_64/release/ffmpeg/

> If you don't think the package is useful under those constraints, don't 
> let this discourage you from offering either the cygport for interested 
> people to build it themselves, or the packages via an overlay package 
> server [2]

As I mentioned in IRC, the Fedora approved numerous of codecs for
ffmpeg recently. As a result, ffmpeg-free package becomes much more
useful compared to the past.

As far as using for ffmpeg-plugin of moc (Music player), it has
almost enough codecs.

ffmpeg itself might be somewhat weak (e.g., no x264, x265),
however, it whold be much better than nothing.

> [1] https://cygwin.com/packaging-contributors-guide.html#submitting
> [2] https://cygwin.com/package-server.html#overlay

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>