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[Benjamin Drung <1983862@xxxxxxxxxxxxxxxxxx>]

I reset the status of this ticket to track building a working audacity
again.

** Summary changed:

- RM: Audacity 2.4.2 FTBFS with ffmpeg 5.x)
+ Audacity 2.4.2 FTBFS with ffmpeg 5.x

** Changed in: audacity (Ubuntu)
       Status: Fix Released => Triaged

** Changed in: audacity (Ubuntu)
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1983862

Title:
  Audacity 2.4.2 FTBFS with ffmpeg 5.x

Status in audacity package in Ubuntu:
  Triaged
Status in audacity package in Debian:
  Confirmed

Bug description:
  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/

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