[FFmpeg-trac] #6158(avcodec:open): ffmpeg does not detect/decode MQA encoded FLAC properly

[FFmpeg]

#6158: ffmpeg does not detect/decode MQA encoded FLAC properly
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             Reporter:  Nomis101    |                    Owner:  (none)
                 Type:  defect      |                   Status:  open
             Priority:  wish        |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  MQA, FLAC   |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Changes (by Balling):

 * status:  reopened => open

Comment:

 I managed to finally hack the second unfold in. But 3rd unfold will not
 work and for 44100 24 bit files with ORIGINALSAMPLERATE 44100 the first
 unfold will work but the second will produce the same file with b stage
 metadata still. Even then by default mqarender will render at x2 frequncy,
 and that will corrupt the wav file. The opposite problem is for 3rd unfold
 files, with -r 352800 it will corrupt the file, without -r everything is
 good.

 The command one should use is (after unpacking rootfs with everything, not
 just one library into lib). Yes, this uses ld linker as executable. I use
 new library from web.archive https://0x0.st/HzxT.tar.bz2


 ./lib/lib/ld-linux-armhf.so.3 --library-path /home/dextop/Downloads/mqa-
 master/lib/lib:/home/dextop/Downloads/mqa-master/lib/usr/lib
 '/home/dextop/Downloads/mqa-master/arm/mqarender' ./outp7.wav
 rendered7.wav


 There are some interesting points about making it so only 2nd unfold will
 be permissable:

 https://github.com/yuv418/libbluos_ssc_ipc/commit/d273239216ba8aa454b14f310d163319df10989f

 I also opened an issue upstream:
 https://code.videolan.org/mansr/mqa/-/issues/2
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/6158#comment:16>
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