#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>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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