#10971: ffmpeg AC3/EAC3 encoder missing LFE channel in some channel layouts
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Reporter: Jose | Type: defect
Peirote |
Status: new | Priority: normal
Component: ffmpeg | Version: git-
| master
Keywords: ac3 encoder | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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ffmpeg.exe -i "5_2-2.1.ac3" -acodec ac3 -ab 384k "5_2-2.1.ac3_.ac3"
ffmpeg version n7.0-3-g607fca80b7-20240405 Copyright (c) 2000-2024 the
FFmpeg developers
Input #0, ac3, from '5_2-2.1.ac3':
Stream #0:0: Audio: ac3, 48000 Hz, 5 channels (FL+FR+LFE+SL+SR), fltp,
384 kb/s
Output #0, ac3, to '5_2-2.1.ac3_.ac3':
Stream #0:0: Audio: ac3, 48000 Hz, quad(side), fltp, 384 kb/s
End job
The LFE channel is missing. The same for eac3 encode.
You can test it with the sample encoded with the old Aften.
Also the LFE is deleted in downmix when > 6 channels:
Input #0, 48000 Hz, 6.1, 6.1(back), 6.1(front), 7.1, 7.1(wide), 7.1(wide-
side) or 7.1(top) always
Output #0, ac3 or eac3, 5.0
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Ticket URL: <https://trac.ffmpeg.org/ticket/10971>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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