Ffmpeg 4.4.x play 24bit ape file with big noise.

[Song ziming]

Summary of the bug:

Ffmpeg 4.4.x play 24bit ape with big noise when using ffplay or compiled so.

If simplely revert this commit it works fine:​​https://patchwork.ffmpeg.org/project/ffmpeg/patch/20201006001714.19577-1-onemda@gmail.com/

I have tried to dicuss with the author, he will not fix this problem because he want to do other things without coding.

It also works fine in old versions like 4.3.x or other older version.

How to reproduce:

% ffplay APE_48K_24bit_2CH_02_01.ape​
ffmpeg version built on 4.4.x

Other 24bit ape songs have same problem.

[Song ziming]

24bit ape file

[Balling]

But the same happons in media player classic and does not appear to happen in ffplay on git-master!!

P.S. Actually, it does happen in ffplay on git-master too.

[Song ziming]

Replying to Balling:

But the same happons in media player classic and does not appear to happen in ffplay on git-master!!

windows mediaplayer works fine.

4.3.x ffplay works fine.

4.4.x ffplay not works.

revert ​https://patchwork.ffmpeg.org/project/ffmpeg/patch/20201006001714.19577-1-onemda@gmail.com/\
it works fine too.

[Balling]

windows mediaplayer works fine.

Not here.

Also we only support git-master, we do not support 4.4 even. So use this and restest: ​https://github.com/BtbN/FFmpeg-Builds/releases/tag/latest

[Balling]

In fact it works good with PoverDVD 2019 or 2020.

[Song ziming]

Replying to Balling:

windows mediaplayer works fine.

Not here.

Also we only support git-master, we do not support 4.4 even. So use this and restest: ​https://github.com/BtbN/FFmpeg-Builds/releases/tag/latest

It can be reproduced by
master ffmpeg-master-latest-win64-lgpl.zip
or ffmpeg-n4.4-latest-win64-lgpl-4.4.zip
when using cmd
ffplay APE_48K_24bit_2CH_02_01.ape

[Balling]

Those are not supported here.

[Song ziming]

Replying to Balling:

Those are not supported here.

What are not support? The problem is libavcodec/apedec.c decoder not work well for 24bit ape file... in the 4.4.x branch or master.

[Balling]

Replying to Song ziming:

Replying to Balling:

Those are not supported here.

What are not support? The problem is libavcodec/apedec.c decoder not work well for 24bit ape file... in the 4.4.x branch or master.

We do not support 4.4. I cannot reproduce on master. It does happen on older ffmpeg in VLC e.g., sure.

[Song ziming]

Replying to Balling:

Replying to Song ziming:

Replying to Balling:

Those are not supported here.

What are not support? The problem is libavcodec/apedec.c decoder not work well for 24bit ape file... in the 4.4.x branch or master.

We do not support 4.4. I cannot reproduce on master. It does happen on older ffmpeg in VLC e.g., sure./tag/latest

I download daily build ffmpeg-master-latest-win64-lgpl.zip from ​https://github.com/BtbN/FFmpeg-Builds/releases。Unzip it on windows，enter bin folder，run cmd，input :ffplay APE_48K_24bit_2CH_02_01.ape​ . After a few seconds it appears big noise.

[Balling]

Okay, I can reproduce it.

[Song ziming]

Replying to Balling:

Okay, I can reproduce it.

1. This commit cause the problem

​​https://patchwork.ffmpeg.org/project/ffmpeg/patch/20201006001714.19577-1-onemda@gmail.com/
But I cannot make sure just revert this commit is enough.

2. Please fix it at master and newest 4.4.x branch.

[Balling]

Setting to git-master.

[Marton Balint]

Regression since ed0001482a74b60f3d5bc5cd7e304c9d65b2fcd5.

[Balling]

No such problem in Adobe Audition.

[LD-531]

Git build: 2023-06-04-git-b1c3d81e71 (​https://gyan.dev/ffmpeg/builds/ffmpeg-git-full.7z) issue are still. ffplay.exe playing and ffmpeg.exe decoding 24bit ape got BIG noise, no exception or error prompted.

[Balling]

Fixed in 80ad0e2198df4e2961928d8304da58df6db77ec4, in fact the sample is bitperfect with the result before the regression, md5 8067d7c880ecacf6b35bb6086f3a5baa for

ffmpeg.exe -i APE_48K_24bit_2CH_02_01.ape -c:a pcm_s24le -f md5 -