Bug 348148

Summary:	video speed adjustment changes clip truncation
Product:	[Applications] kdenlive	Reporter:	Eumel <blaueshawaiihemd>
Component:	Rendering & Export	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED FIXED
Severity:	normal	CC:	mbocek, qubodup, subdiff, wegwerf-1-2-3
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Eumel 2015-05-23 14:31:05 UTC

I have truncated a video clip to a small section. If I adjust the section to 2300% speed (or smaller), it does start from the right point in time (according to my cut). If I adjust it to 2400% (or larger) the section clip suddenly shows a completely different part of the original video clip.

Reproducible: Always




Version 15.04.0-0ubuntu1~ubuntu15.04~ppa2 from kubuntu-backports

Comment 1 Roman Gilg 2015-11-01 14:53:13 UTC

Do you still have this problem? I just encountered the same problem. Applications 15.08.

Comment 2 qubodup 2015-11-24 06:44:56 UTC

I can confirm the issue that the speed effect causes the clip to be clipped (in my case only on the right side) when using high values:
https://www.youtube.com/watch?v=bZUAowpFyTI

I can reproduce this by following your steps but increasing the values a little:
https://youtu.be/rY4odVLQTHk

There are small inconsistencies when using 2300%/2400% but at 3000% the area of the clip definitely gets screwed up in my case.

I used
https://archive.org/download/StockVideoGameVideo/TriggerRallyGeneralPurposeVideo.mp4 (MPEG4 download at https://archive.org/details/StockVideoGameVideo ) for testing.

Comment 3 Wegwerf 2015-11-26 11:59:25 UTC

Same over here.

Comment 4 Wegwerf 2016-08-12 16:24:31 UTC

Cannot reproduce with recent Kdenlive 16.04.2/beta 16.07.90, MLT 6.2.0+ and the new timewarp-based speed effect. This seems to be fixed.