0002361: Wrong start point for video clips in AVCHDlite format

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Project

Category

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Date Submitted

Last Update

0002361

Kdenlive

MLT

public

2011-10-24 11:32

2012-02-07 09:05

Reporter

EdRoxter

Assigned To

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

32bit Intel

Kubuntu

OS Version

11.10 Oneiric

Product Version

Recent git

Target Version

Fixed in Version

Summary

0002361: Wrong start point for video clips in AVCHDlite format

Description

Since I've upgraded to Oneiric which ships kdenlive 0.8, the following weird issue appears:

I have a project with some AVCHDlite clips from a Panasonic Lumix G2. When I set an In and Out Point then and put them in the timeline by pressing the V key, or when I put a clip in the timeline and then cut something at the beginning, the video jumps in at the wrong point (sometimes 10-15 seconds before the In Point - this usually results in short clips just playing from the beginning -, sometimes several seconds later). I cannot determine what difference there is between the point it should be and the one it is, it seems to be pretty random. Audio is cut correctly, though, so the result is totally async.

I can already see this when I preview the project in kdenlive and it stays with rendering. I created a new project with proxied clips. Preview is fine there, rendering gives the same problem.

So might this be an issue with MLT and AVCHD source clips, perhaps searching within videos with this format is buggy. I tried it with .mov source clips from another camera and it works flawlessly. I also transcoded some of my clips to mp4 with ffmpeg and it worked as well. So I could transcode all my clips before using them in kdenlive, but that's not actually the way to go. :)

I've also tried deinstalling kdenlive and all dependent libraries, then adding the kdenlive-svn PPA, then installing the most recent version (kdenlive 0.8.1 with MLT 0.7.5), nothing changed about this.

Steps To Reproduce

Put an AVCHDlite clip in the timeline, cut something off the beginning, then play the project in kdenlive, melt, or render it to any format.

Tags

No tags attached.

Build/Install Method

3rd party package

Attached Files

Relationships

Notes
(0007485) EdRoxter (reporter) 2011-11-02 10:50	Updated to 0.8.2 from sunab/kdenlive-svn ppa, still having this issue.

(0007871) karsta62 (reporter) 2012-02-07 09:05	I have similar issue without even cutting or clipping anything. In review and rendered result it jumps a few seconds off the video from the beginning. But i found a workaround: Put the cue pointer (or what is it called?) on the timeline just before the MTS clip. Then by cursor right -key, go frame by frame (do not press and hold) through the beginning of the clip. Just over the point it tends to jump to. After that they render ok.

Issue History
Date Modified	Username	Field	Change
2011-10-24 11:32	EdRoxter	New Issue
2011-11-02 10:50	EdRoxter	Note Added: 0007485
2012-02-07 09:05	karsta62	Note Added: 0007871