0002496: Abnormal fps and its effect on "blue screen" effect

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Date Submitted

Last Update

0002496

Kdenlive

Capture

public

2012-01-22 16:23

Reporter

Assigned To

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

32 bit intel and alike

Kubuntu

OS Version

10.04

Product Version

Recent git

Target Version

Fixed in Version

Summary

0002496: Abnormal fps and its effect on "blue screen" effect

Description

I use a Sony HDR-HC9 MiniDV High Definition Handycam Camcorder (mpeg2), and after acquisition by using kdenlive, some (but not all) of the video m2t files have abnormal fps (according to ffmpeg -i): e.g. 30.65, 25.68, etc... instead of 25.
I never noticed it before and I think this has no impact when no effect is used in the montage.
Recently I used the blue screen effect, and when I use it on one of these clips, I get a very large desynchronization of sound and video, and kdenlive seems to loose montage points.

Steps To Reproduce

just add blue screen effect on one of these clips with abnormal fps.

Additional Information

So far I resolved the question by doing this:
ffmpeg -i Corse001.m2t -vcodec copy -acodec copy Corse1.m2t

the resulting file has a correct 25 fps, and the blue screen effect problem disappears...

I don't know if the problem is coming from the camcorder of from video acquisition program.

Issue History
Date Modified	Username	Field	Change
2012-01-22 16:23	MZ	New Issue

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