0001791: Severe Audio stuttering issues, also in rendered file

(0005750)
sterna (reporter)
2010-09-02 10:50
edited on: 2010-09-02 10:51

I was able to work around a very similar issue by manually remuxing the quicktime files created by a Canon EOS into avi files using ffmpeg like this:

for f in *mov ; do ffmpeg -i $f -vcodec copy -acodec copy $f.avi ; done

After this, my audio sounds accurate (though I have yet to render a clip that actually plays OK with most players - only mplayer does a decent job currently).

It may be worth pointing out that the audio thumbnails have been accurate all the time, but playback and rendering both output stretches of audio repeated, then skip some.

(0005802)
ttill (developer)
2010-09-06 22:28

Cannot reproduce, or I do not hear it ;)
Does this also happen when playing with "in" set in melt?
Or when seeking in ffplay?

Anyways how do you crop 3.5 seconds and then listen to 3:12?

(0005831)
Granjow (developer)
2010-09-13 18:37

Okay.
I put the clip to the beginning of the timeline, press Play. When it reaches about 4 or 5 seconds I click to 3:09 (09 = frame 9, not 0.09 seconds) so the cursor jumps to 3:09 and continues playing from there. Reverbs like in a big cave.

When resizing the beginning by dragging it to 3:09, placing the cursor before the start of the clip, and pressing play again: reverbs again.

Audible as well with
melt audio-stuttering-sample.avi in=84

(0005854)
Granjow (developer)
2010-09-18 17:19

@ttill, can you reproduce it now?

(0005855)
ttill (developer)
2010-09-18 18:44

sorry, forgot about that report.
I did also notice it now.
However playing it like this "ffplay audio-suttering-sample.mp4 -ss 3" does not have audio at the problematic scene at all. Not sure if this is related to ffplay's seeking capabilities though.

(0005881)
ddennedy (developer)
2010-09-22 05:40

I am not able to download the entire file. Only shows about 1sec when loaded. Tried downloading 3 times, third time with wget.

(0005894)
Granjow (developer)
2010-09-22 09:38

Tried as well right before, no problem.
98495052 1. Sep 11:26 audio-stuttering-sample.avi
md5sum: 3db705d49911b9e8f2b269775254a49a

Notes
(0005750) sterna (reporter) 2010-09-02 10:50 edited on: 2010-09-02 10:51	I was able to work around a very similar issue by manually remuxing the quicktime files created by a Canon EOS into avi files using ffmpeg like this: for f in *mov ; do ffmpeg -i $f -vcodec copy -acodec copy $f.avi ; done After this, my audio sounds accurate (though I have yet to render a clip that actually plays OK with most players - only mplayer does a decent job currently). It may be worth pointing out that the audio thumbnails have been accurate all the time, but playback and rendering both output stretches of audio repeated, then skip some.

(0005802) ttill (developer) 2010-09-06 22:28	Cannot reproduce, or I do not hear it ;) Does this also happen when playing with "in" set in melt? Or when seeking in ffplay? Anyways how do you crop 3.5 seconds and then listen to 3:12?

(0005831) Granjow (developer) 2010-09-13 18:37	Okay. I put the clip to the beginning of the timeline, press Play. When it reaches about 4 or 5 seconds I click to 3:09 (09 = frame 9, not 0.09 seconds) so the cursor jumps to 3:09 and continues playing from there. Reverbs like in a big cave. When resizing the beginning by dragging it to 3:09, placing the cursor before the start of the clip, and pressing play again: reverbs again. Audible as well with melt audio-stuttering-sample.avi in=84

(0005854) Granjow (developer) 2010-09-18 17:19	@ttill, can you reproduce it now?

(0005855) ttill (developer) 2010-09-18 18:44	sorry, forgot about that report. I did also notice it now. However playing it like this "ffplay audio-suttering-sample.mp4 -ss 3" does not have audio at the problematic scene at all. Not sure if this is related to ffplay's seeking capabilities though.

(0005881) ddennedy (developer) 2010-09-22 05:40	I am not able to download the entire file. Only shows about 1sec when loaded. Tried downloading 3 times, third time with wget.

(0005894) Granjow (developer) 2010-09-22 09:38	Tried as well right before, no problem. 98495052 1. Sep 11:26 audio-stuttering-sample.avi md5sum: 3db705d49911b9e8f2b269775254a49a

Issue History
Date Modified	Username	Field	Change
2010-09-01 11:10	Granjow	New Issue
2010-09-02 10:50	sterna	Note Added: 0005750
2010-09-02 10:51	sterna	Note Edited: 0005750	View Revisions
2010-09-06 22:28	ttill	Note Added: 0005802
2010-09-06 22:28	ttill	Status	new => feedback
2010-09-13 18:37	Granjow	Note Added: 0005831
2010-09-13 18:37	Granjow	Status	feedback => new
2010-09-18 17:19	Granjow	Note Added: 0005854
2010-09-18 18:44	ttill	Note Added: 0005855
2010-09-22 05:40	ddennedy	Note Added: 0005881
2010-09-22 09:38	Granjow	Note Added: 0005894

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