ffmpeg 7.0 support

[sebastinas]

chromaprint fails its tests with ffmpeg 7.0:

[ RUN      ] FFmpegAudioReaderTest.ReadRaw
./src/audio/ffmpeg_audio_reader_test.cpp:18: Failure
Expected equality of these values:
  2
  reader.GetChannels()
    Which is: 1

[  FAILED  ] FFmpegAudioReaderTest.ReadRaw (7 ms)

See for example https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1072404. Arch and Debian have applied a similar patch to address this issue, but users are experiencing issues. It would be great if ffmpeg 7.0 support could be added.

[calestyo]

As I found out after some debugging (with having literally no clue about ffmpeg development ^^), at least the problem I’ve seen and described in the aforementioned is probably already fixed by commit 82781d0.

At least the test seem to run through for me and fpcalc produced some value again.

[calestyo]

@lalinsky Could you perhaps release a new version with the few commits since 1.5.1?