Opened 5 years ago
Last modified 5 years ago
#8337 open defect
MPEG-4 ALS: Overread 8 when decoding
Reported by: | Erik Jensen | Owned by: | |
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Priority: | normal | Component: | avcodec |
Version: | git-master | Keywords: | als |
Cc: | erikjensen_ffmpeg@rkjnsn.net | Blocked By: | |
Blocking: | Reproduced by developer: | yes | |
Analyzed by developer: | no |
Description
(note: this may be a dupe of #5943, but in my case occurs with a regular 16-bit stereo file.)
Summary of the bug:
File encoded using the mp4alsRM23 reference encoder decodes properly using the reference decoder, but results in the following error when decoding with FFmpeg:
[als @ 0x555cf2fb15c0] Overread 8
How to reproduce:
% ffmpeg -i mpeg4-als-overread-8.mp4 -f hash - ffmpeg version N-95568-g1054752c56 built with gcc 8.3.0 (Gentoo 8.3.0-r1 p1.1)
Expected output:
SHA256=db0ab7107554cf6f2ea372ec523dd7e906b0f6f00b2c9b4998c8f5f4a1cf8e1f
Actual output:
[als @ 0x555cf2fb15c0] Overread 8 [als @ 0x555cf2fb15c0] Reading frame data failed. Skipping RA unit. [out_0_0 @ 0x555cf2fffe80] EOF on sink link out_0_0:default. SHA256=3b12b6e81c46f3a123f2f7a4239bccb591b0d1268ed457f5156cc1c2406ff672
Attached are the log from the above command (decode.log) and the output of ffmpeg -v 9 -loglevel 99 -i mpeg4-als-overread-8.mp4
(verbose.log). I'll be uploading mpeg4-als-overread-8.mp4 to upload.ffmpeg.org shortly.
Attachments (2)
Change History (6)
by , 5 years ago
Attachment: | decode.log added |
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by , 5 years ago
Attachment: | verbose-info.log added |
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Log from ffmpeg -v 9 -loglevel 99 -i mpeg4-als-overread-8.mp4
comment:1 by , 5 years ago
Cc: | added |
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Hmm.. my ftp connection to upload.ffmpeg.org seems to be timing out at the moment. Is there a better way to get you the sample? Otherwise, I'll try again, later.
comment:2 by , 5 years ago
Upload your sample to a file hoster of your choice and post the link here.
comment:3 by , 5 years ago
mpeg4-als-overread-8.mp4:
https://drive.google.com/file/d/1YewFMZbblw0t-twXQzmkcsq6FYIsOdTZ/view?usp=sharing
comment:4 by , 5 years ago
Reproduced by developer: | set |
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Status: | new → open |
Log from ffmpeg -i mpeg4-als-overread-8.mp4 -f hash -