Opened 2 hours ago
Last modified 2 hours ago
#11321 new defect
dolby digital plus 7.1 defective decoding
Reported by: | Alexander | Owned by: | |
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Priority: | normal | Component: | avcodec |
Version: | Keywords: | ||
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | no | |
Analyzed by developer: | no |
Description (last modified by )
Greetings.
Summary of the bug:
I found out that the decoding of ddp 7.1 and ddp 7.1 joc is defective. It looks like the audio data frames from one channel are dropping out into the other channels. It happens in random places. This can be clearly seen in the spectrogram, zooming in on a given defect location shows the absence of signal in one channel and the presence of it in another. It can be clearly audible as clicks on separate channels, but may not be audible when listening on the player in stereo downmix. The defect appears on all versions of ffmpeg with libavcodec decoder higher than 59.37.100.
How to reproduce:
ffmpeg-master-latest-win64-gpl\bin>ffmpeg.exe -drc_scale 0 -i "sample.eac3" -c pcm_s24le "sample.wav" ffmpeg version N-117868-gecc7d5db9c-20241123 libavcodec 61. 25.102 / 61. 25.102
How to reproduce:
ffmpeg-n7.1-latest-win64-gpl-7.1\bin>ffmpeg.exe -drc_scale 0 -i "sample.eac3" -c pcm_s24le "sample_n7.1.wav" ffmpeg version n7.1-36-g20c8a3f5ff-20241123 libavcodec 61. 19.100 / 61. 19.100
How to reproduce:
ffmpeg-n6.1-latest-win64-gpl-6.1\bin>ffmpeg.exe -drc_scale 0 -i "sample.eac3" -c pcm_s24le "sample_n6.1.wav" ffmpeg version n6.1.2-15-ga6a07eebdf-20241123 libavcodec 60. 31.102 / 60. 31.102
How to produce correct results without defects:
ffmpeg-n5.1-latest-win64-lgpl-5.1\bin>ffmpeg.exe -drc_scale 0 -i "sample.eac3" -c pcm_s24le "sample_n5.1.wav" ffmpeg version n5.1.6-11-gcde3c5fc0c-20241123 libavcodec 59. 37.100 / 59. 37.100
eac3 7.1 sample:
https://drive.google.com/file/d/1H78XIQCBHg9YIj8gpcXWJ4uAVqGvI0sz/view?usp=sharing
Attachments (4)
Change History (5)
by , 2 hours ago
Attachment: | sample_master.png added |
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by , 2 hours ago
Attachment: | sample2_n5.1.png added |
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by , 2 hours ago
Attachment: | samples.C.png added |
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by , 2 hours ago
Attachment: | samples2.C.png added |
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comment:1 by , 2 hours ago
Description: | modified (diff) |
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