[FFmpeg-trac] #2706(avcodec:new): Native AAC encoder produces warbling with pure aevalsrc sine wave
FFmpeg
trac at avcodec.org
Thu Jun 27 17:04:25 CEST 2013
#2706: Native AAC encoder produces warbling with pure aevalsrc sine wave
------------------------------------+-----------------------------------
Reporter: MarkZV | Owner:
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: aac | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Kamedo2):
I reproduced the warbling effect, on recent ffmpeg N-54096-ge41bf19 I've
got from git, and one ffmpeg version 1.2.1. The warbling was reproduced
using the flac file above.
{{{
ffmpeg -i sine440Hz_24bit.flac -vn -c:a aac -strict experimental -b:a 128k
sin440Hz_24bit.mp4
}}}
Both versions were tested and bitrate 0k, 16k, 32k, ......, 240k, 256k was
tested.
I listened to the 34 mp4 files and any files above 64k had a serious
warbling.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2706#comment:4>
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