0002852: Videostab (transcode) gives a dirty result

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Project

Category

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Date Submitted

Last Update

0002852

Kdenlive

Effects

public

2012-11-30 14:11

2012-12-03 17:52

Reporter

fcoiffie

Assigned To

Priority

normal

Severity

major

Reproducibility

always

Status

new

Resolution

open

Platform

64 bit

Gentoo Linux

OS Version

2008.0

Product Version

0.9.2

Target Version

Fixed in Version

Summary

0002852: Videostab (transcode) gives a dirty result

Description

The default parameters proposed by Videostab (transcode) doesn't give a good result (compared to Videostab (vstab)) whereas it's a really powerfull filter.

* the smoothing value is too low for usual shaky videos (stabilization is done by default on 10 frames = 0.4s). A value like 30 frames gives much better result
* a very important option for the image quality in the MLT filter is rescale.interp. Original transcode plugin used bilinear. By default, MLT seems to use a different value (Can be quickly tested with MLT command line :

melt video.mov -filter videostab2 shakiness=8 smoothing=30 rescale.interp=bilinear -consumer xml:video.xml all=1 real_time=-2

vs

melt video.mov -filter videostab2 shakiness=8 smoothing=30 rescale.interp=bilinear -consumer xml:video.xml all=1 real_time=-2
)

And in Kdenlive, I cannot find where I can set this option

Steps To Reproduce

1. Take a shaky video
2. Try to stabilize it with Videostab (vstab)
3. Try to stabilize it with Videostab (transcode)

=> The 2nd video is still shaky and the image is dirty (many vertical/horizontal artefacts) compared to the 1st one

Issue History
Date Modified	Username	Field	Change
2012-11-30 14:11	fcoiffie	New Issue

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