#3158 closed defect (invalid)
FFmpeg fails to encode mono audio using libfdk-aac and a variable bitrate.
| Reported by: | lkiesow | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avcodec |
| Version: | unspecified | Keywords: | libfdk-aac |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | yes |
Description
Summary of the bug:
FFmpeg fails to encode mono audio using libfdk-aac and a variable bitrate.
- Mono and fixed bitrate works
- Stereo and variable bitrate works
How to reproduce:
% fmpeg -i test.wav -c:a libfdk_aac -ac 1 -vbr 3 test.aac
FFmpeg-Version used: 2.1
Test media (~600kb):
Log output:
http://repo.virtuos.uos.de/ffmpeg-libfdk_aac-bug/ffmpeg-20131118-104646.log.txt
Attachments (2)
Change History (6)
by , 10 years ago
| Attachment: | ffmpeg-20131118-104646.log added |
|---|
by , 10 years ago
comment:1 by , 10 years ago
| Component: | FFmpeg → avcodec |
|---|---|
| Keywords: | libfdk_aac added; audio Mono AAC removed |
Is this reproducible with current FFmpeg git head?
comment:2 by , 10 years ago
The following command works:
ffmpeg -i test.wav -c:a libfdk_aac -ar 22050 -ac 1 -vbr 3 -y test.aac
Seems a problem with the libfdk_aac library.
comment:3 by , 10 years ago
| Analyzed by developer: | set |
|---|---|
| Reproduced by developer: | set |
| Resolution: | → invalid |
| Status: | new → closed |
I got confirmation that the issue is related to libfdk-aac functionality status. In short VBR encoding in libfdk-aac is experimental and only works with some parameter combinations (as shown in the log).
I stressed that in our docs. Closing the ticket since the issue is not related to our codebase.
comment:4 by , 5 years ago
| Keywords: | libfdk-aac added; libfdk_aac removed |
|---|---|
| Version: | → unspecified |
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