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IDProjectCategoryView StatusDate SubmittedLast Update
0001107KdenliveRenderingpublic2009-08-29 20:162010-09-22 17:53
Assigned Toj-b-m 
PlatformOSOS Version
Product Version0.7.5 
Target Version0.7.6Fixed in Version0.7.6 
Summary0001107: Audio corrupted when trimming start of EOS 5D MK2 files
DescriptionI'm currently working with video files from the Canon EOS 5D MK2.
When files are simply added to the timeline (without trimming), render output is fine.

Unfortunately, when the start of the file is trimmed (by means of the clip monitor), audio gets corrupted.

In case of a single file, sound is lost after 1-2 seconds.
If an untrimmed file is followed by a file with a trimmed start, audio of the first file bleeds into the second file and subsequently gets lost completely.
Additional InformationI'm willing to help in any way possible, just let me know how to assist.

Kdenlive Version 0.7.5 from [^] on Ubuntu 9.04 - the Jaunty Jackalope
TagsNo tags attached.
Build/Install Method3rd party package
Attached Filesmov file icon MVI_2908.MOV [^] (23,552,549 bytes) 2009-08-29 21:49
? file icon Rendered_Trimmed.m2t [^] (2,786,912 bytes) 2009-08-29 21:54
? file icon Rendered_Untrimmed.m2t [^] (4,391,680 bytes) 2009-08-29 21:57
png file icon Screenshot.png [^] (471,998 bytes) 2009-08-30 10:42

- Relationships

-  Notes
j-b-m (administrator)
2009-08-29 20:47

Several audio sync issues were very recently fixed in MLT, a new release should happen soon. Not sure if this will fix your issue, but in the meantime, what you could do is upload a small video sample so that we can try to reproduce the issue.

Currently, this camera is marked as "unsupported" in our database, see: [^]
Heineken (reporter)
2009-08-29 21:10

Thanks for the quick answer.
About the camera being unsupported, it's described as "Video editing works, but slowly," which would be fine with me :-)

Meanwhile I have tried to create a video short enough to fit into the 5000k file limit for uploads. The camera records at least 1 second, which is 5.6MB.

Is it possible to increase the file limit? A useful sample file would be around 30MB.
j-b-m (administrator)
2009-08-29 21:18

Ok, I temporarily increased the upload size to 30 MB. If it's ok for you, I will put a link to your uploaded file in the camcorder's info page of our database, so that it can be used for further tests.
j-b-m (administrator)
2009-08-29 23:42

Thanks for the video. I did a few tests and don't see (or hear) any audio corruption, but of course it's hard to say with a short file.

In any case, I can put it in timeline, resize the clip to start after a few seconds and nothing unusual happens, so I think the problem might be solved - I am using latest git MLT and latest FFmpeg svn, so not sure if the fix is in MLT, FFmpeg or both.

I also put your video sample on the camcorder info page. regards
Heineken (reporter)
2009-08-30 10:41

Just to be sure we both made the same test, these are the steps:

1) Added file MVI_2908.MOV to the project.
2) Used the Clip Monitor to trim 0.8 seconds for the start of the file.
   (Please see attached screenshot)
3) Add the clip to the time line, aligned to the start.
4) Render.
5) Resulting file drops silent after 1 second of playback (See attached "Rendereed_Trimmed.mt2").

If this setup works flawlessly on your machine, we can consider the bug closed and I'll wait patiently for the next release :-)
j-b-m (administrator)
2009-08-30 10:52

Yes, I can confirm that audio works fine using the instructions you gave in your last comment.

- Issue History
Date Modified Username Field Change
2009-08-29 20:16 Heineken New Issue
2009-08-29 20:16 Heineken Build/Install Method => 3rd party package
2009-08-29 20:47 j-b-m Note Added: 0003831
2009-08-29 20:47 j-b-m Status new => feedback
2009-08-29 21:10 Heineken Note Added: 0003832
2009-08-29 21:18 j-b-m Note Added: 0003833
2009-08-29 21:49 Heineken File Added: MVI_2908.MOV
2009-08-29 21:54 Heineken File Added: Rendered_Trimmed.m2t
2009-08-29 21:57 Heineken File Added: Rendered_Untrimmed.m2t
2009-08-29 23:42 j-b-m Note Added: 0003834
2009-08-30 10:41 Heineken Note Added: 0003835
2009-08-30 10:42 Heineken File Added: Screenshot.png
2009-08-30 10:52 j-b-m Note Added: 0003836
2009-08-30 10:52 j-b-m Status feedback => resolved
2009-08-30 10:52 j-b-m Resolution open => fixed
2009-08-30 10:52 j-b-m Assigned To => j-b-m
2009-09-10 01:39 xzhayon Target Version => future version
2009-09-10 01:46 xzhayon Fixed in Version => Recent git
2009-10-08 20:20 j-b-m Fixed in Version Recent git => 0.7.6
2010-02-02 10:35 j-b-m Fixed in Version 0.7.6 => 0.7.7
2010-02-02 10:37 j-b-m Fixed in Version 0.7.7 => 0.7.6
2010-02-02 10:38 j-b-m Status resolved => closed
2010-09-22 17:53 Granjow Target Version future version => 0.7.6

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