[Bug 1983862] [NEW] Audacity 2.4.2 FTBFS with ffmpeg 5.x)

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Steve Langasek (vorlon):

Audacity is a very high-profile, cross-platform application. As it
stands. Audacity has been stagnant at 2.4.2 for several releases. 3.1
has been out for some time and is compatible with ffmpeg 5.

At this point, we are finding our hand forced. 2.4.2 is incompatible
with ffmpeg 5, and as such we must upgrade, patch, or remove. Users of
Audacity would much rather see an upgrade, as I have seen in bug reports
as of late, or in the #ubuntustudio chat.

The biggest hurdles have been the telemetry which can be disabled by
default as discussed via
https://github.com/audacity/audacity/discussions/889.

Note that the biggest requirement, wxwidgets, only recently got uploaded
post-Feature Freeze, which otherwise would have made this FFe moot. This
bug has been being worked on since prior to FFe, so IMO this is a bug
fix that just happens to carry features with it, similar to what you'd
find if wxwidgets had been uploaded prior to Feature Freeze.

Basically, I'm hoping that some of the logic that can be applied here is
that the exception is based mostly on the late upload of wxwidgets which
was beyond the control of those involved.

I think that having new features in an application is a better option
than having it removed completely for the sake of a feature freeze in
this case, especially when it's as high-profile of an application as
this one.


----
Original Description:

https://launchpadlibrarian.net/615233650/buildlog_ubuntu-kinetic-
amd64.audacity_2.4.2~dfsg0-5build1_BUILDING.txt.gz

(...)
In file included from /<<PKGBUILDDIR>>/src/AudacityApp.cpp:82:
/<<PKGBUILDDIR>>/src/FFmpeg.h: In constructor ‘AVPacketEx::AVPacketEx()’:
/<<PKGBUILDDIR>>/src/FFmpeg.h:892:21: warning: ‘void av_init_packet(AVPacket*)’ is deprecated [-Wdeprecated-declarations]
  892 |       av_init_packet(this);
      |       ~~~~~~~~~~~~~~^~~~~~
In file included from /usr/include/x86_64-linux-gnu/libavcodec/avcodec.h:45,
                 from /<<PKGBUILDDIR>>/src/FFmpeg.h:53:
/usr/include/x86_64-linux-gnu/libavcodec/packet.h:506:6: note: declared here
  506 | void av_init_packet(AVPacket *pkt);
      |      ^~~~~~~~~~~~~~
/<<PKGBUILDDIR>>/src/FFmpeg.h: In member function ‘void AVPacketEx::reset()’:
/<<PKGBUILDDIR>>/src/FFmpeg.h:919:7: error: ‘av_free_packet’ was not declared in this scope; did you mean ‘av_new_packet’?
  919 |       av_free_packet(this);
      |       ^~~~~~~~~~~~~~
      |       av_new_packet
/<<PKGBUILDDIR>>/src/FFmpeg.h: In member function ‘void AVPacketEx::steal(AVPacketEx&&)’:
/<<PKGBUILDDIR>>/src/FFmpeg.h:926:21: warning: ‘void av_init_packet(AVPacket*)’ is deprecated [-Wdeprecated-declarations]
  926 |       av_init_packet(&that);
      |       ~~~~~~~~~~~~~~^~~~~~~
/usr/include/x86_64-linux-gnu/libavcodec/packet.h:506:6: note: declared here
  506 | void av_init_packet(AVPacket *pkt);
      |      ^~~~~~~~~~~~~~

FFmpeg 5.0 changed the API and it required a big patch for audacity:
https://github.com/audacity/audacity/pull/3121/files

Note that patch is on top of master, and Debian/Ubuntu still carry old
version 2.4.2. To fix this, the package needs to be first updated to
3.1.3 (or later), and then have that patch applied.

Upstream issue (now resolved): https://github.com/audacity/audacity/issues/2445
Debian RC bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1004598

audacity was removed from debian testing today:
https://tracker.debian.org/news/1352473/audacity-removed-from-testing/

** Affects: audacity (Ubuntu)
     Importance: Undecided
         Status: Confirmed

** Affects: audacity (Debian)
     Importance: Unknown
         Status: Confirmed


** Tags: ftbfs update-excuse
-- 
Audacity 2.4.2 FTBFS with ffmpeg 5.x)
https://bugs.launchpad.net/bugs/1983862
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