Bug#455691: MP3 Decoding regression: audible clipping and popping
slomo at circular-chaos.org
Tue Dec 11 08:07:16 UTC 2007
Am Montag, den 10.12.2007, 23:38 -0800 schrieb Josh Triplett:
> Package: gstreamer0.10-plugins-ugly
> Version: 0.10.6-3
> Severity: normal
> Recently, I noticed that quodlibet started clipping some mp3s, with a
> noticeable static pop. Other players, such as mplayer or totem (using
> totem-xine), play the same files fine with no clipping. I tried
> gst-launch with the mad decoder, and it had the same clipping.
> gst-launch with "ffdemux_mp3 ! ffdec_mp3" as the decoder did not clip.
> Finally, I tried using sox (which uses libmad) to convert the file
> from mp3 to wav, which generated the message "sox sox: temp.wav:
> output clipped 48802 samples; decrease volume?". However, the resulting wav
> did not clip in any player.
> I tried to downgrade gstreamer to an older version to determine what
> version introduced the regression, but the resulting gstreamer did not
> want to play mp3s; mad would not hook up to alsasink, or to wavenc.
> As a first guess, I've filed the bug against
> gstreamer0.10-plugins-ugly; however, the problem may well lie
> Happy to run further tests to narrow down the problem.
could you try the alsa-lib patch from bug #437827?
This is most likely exactly that bug...
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