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IDProjectCategoryView StatusDate SubmittedLast Update
0002852KdenliveEffectspublic2012-11-30 14:112012-12-03 17:52
Reporterfcoiffie 
Assigned To 
PrioritynormalSeveritymajorReproducibilityalways
StatusnewResolutionopen 
Platform64 bitOSGentoo LinuxOS Version2008.0
Product Version0.9.2 
Target VersionFixed in Version 
Summary0002852: Videostab (transcode) gives a dirty result
DescriptionThe 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 Reproduce1. 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
TagsNo tags attached.
Build/Install MethodDistribution package
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- Issue History
Date Modified Username Field Change
2012-11-30 14:11 fcoiffie New Issue


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