Performance: Playback not as smooth as it could be

bavc / qctools

QCTools (Quality Control Tools for Video Preservation) is a free and open source software tool that helps users analyze and understand their digitized video files through use of audiovisual analytics and filtering. QCTools is funded by the National Endowment for the Humanities and the Knight Foundation, and is developed by the Bay Area Video Coalition.

http://www.bavc.org/qctools

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Performance: Playback not as smooth as it could be #48

Closed pjotrek-b closed 8 years ago

pjotrek-b commented 9 years ago

Nagging as I am, I wanted to note that the playback performance of the filter window is not as good as the hardware would allow. Especially visible with FFV1.

For example, on a computer which is perfectly capable of playing back FFV1 SD-material with other applications (VLC, ffplay, shotcut, kdenlive, etc), QCTools plays slower than realtime.

pjotrek-b commented 9 years ago

Additional information:

System 1: Ubuntu 12.04 amd64, Intel QuadCore i5 (2.7GHz)
System 2: Ubuntu 12.04 amd64, Intel QuadCore i7 (3.4GHz)
Probably due to the generally slow playback, the buttons "+0.5x, +1x, +2x" show no effect/difference at all :(
In order to avoid a certain videofilter being the culprit, I've also verified this behavior with left filter set to "Normal" and the right filter set to "No display": No performance difference.

dericed commented 8 years ago

duplicate of https://github.com/bavc/qctools/issues/84