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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0003203||Kdenlive||Rendering||public||2013-12-26 09:22||2014-02-09 17:49|
|Target Version||Fixed in Version|
|Summary||0003203: Audio crackle between clips without transition|
|Description||The H.264 video rendered has an audio crackle each time a clip ends and the next clip starts, if no transition is used. The clips are "snapped" to each other on the timeline. |
I found a workaround: Adding a very short (00:00:00,01) fade in/fade out to each clip eliminates the crackle, but it's a lot of work which should not be necessary.
Attached you will find two short MP4 files: one containing the crackle (without fade in/fade out) and one without the crackle (with fade in/fade out). A screenshot will show the position, effects and timeline of the videos rendered. For further inspection I'll attach the project file as well.
|Additional Information||The number of encorder threads has no impact on the audio crackle.|
axel@miraculix:~/Videos/ölüdeniz_2013$ dpkg --list kdenlive
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
ii kdenlive 0.9.6-2ubuntu1 amd64 non-linear video editor
|Tags||No tags attached.|
|Build/Install Method||Distribution package|
|Attached Files|| KdenliveCrackle.png [^] (99,103 bytes) 2013-12-26 09:22
no_fade.mp4 [^] (2,792,833 bytes) 2013-12-26 09:24
fade.mp4 [^] (2,792,773 bytes) 2013-12-26 09:25
ölüdeniz_2013.kdenlive [^] (142,719 bytes) 2013-12-26 09:25
which mlt version do you use?
does the bug depend on the source format or is it the same with any (eg mkv)?
thanks for feedback
As source I have only the MP4 file created by my GoPro 3 black action cam.
No idea if other source formats cause crackle as well.
Over that past 3 years I've created about 10 videos using KDEnlive (in case you want to check them out: http://www.youtube.com/user/camueller28/videos [^] ) for which I did not have to add fading to avoid crackle. Maybe it is related to the fact that I have upgraded to Ubuntu 13.10 recently. So far I've been using Ubuntu 12.04.
could you attach a short *source* video sample?
you could also try to convert your source video format with ffmpeg/avconv before importing it, eg:
avconv -i original.mp4 -acodec copy -vcodec copy new.mkv
for format convertion without transcoding, or
avconv -i original.mp4 -ab 128k -qscale 5 new.mkv
I could upload the MP4 source files I used to create no_fade.mp4 and fade.mp4.
These are the ones displayed in the screenshot. You could use the kdenlive project file I already attached. Source files are about 30 MB each:
-rw-r--r-- 1 axel axel 33741194 Jan 20 2012 GOPR0069.MP4
-rw-r--r-- 1 axel axel 29967136 Jan 20 2012 GOPR0070.MP4
I would upload them to a public file hoster - do you have any preference?
Regarding you recommendation to convert the source video before import: Do you really suggest working with kdenlive that way? In this case the workaround I already describe is much more convenient in my opinion.
|2013-12-26 09:22||camueller||New Issue|
|2013-12-26 09:22||camueller||File Added: KdenliveCrackle.png|
|2013-12-26 09:24||camueller||File Added: no_fade.mp4|
|2013-12-26 09:25||camueller||File Added: fade.mp4|
|2013-12-26 09:25||camueller||File Added: ölüdeniz_2013.kdenlive|
|2013-12-29 22:50||vpinon||Note Added: 0009643|
|2013-12-30 17:52||camueller||Note Added: 0009645|
|2014-01-07 07:31||vpinon||Note Added: 0009653|
|2014-02-09 17:49||camueller||Note Added: 0009681|
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