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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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Wishlist- Ability to compare 2 files and apply the temporal difference filter #221

Open audiovisualopen opened 7 years ago

audiovisualopen commented 7 years ago

This would be an obvious method to see differences in encoding and compression. Great for seeing differences between lossless and lossy.

dericed commented 7 years ago

Sounds interesting, I suppose we'd need an adjustment to both the graph view and the player view: to show graphs over time based on too averaged videos and similar for the player. Would also have to manage the offset between the two.

audiovisualopen commented 7 years ago

I agree with your comments Dave. This would be a very powerful feature for an archive, as anything similar like a Picture Quality Analyser hardware/software can be expensive and complicated to run.

kieranjol commented 7 years ago

+1 - it could also be great to compare captures of the same tape on different decks to help figure out which produces a more satisfactory image. OR perhaps compare the output of a BetaSP from a digibeta deck with internal a2d vs a native BetaSP deck with external a2d or things like that.

metacynicv2 commented 7 years ago

+2

Slightly off topic but I'm curious - is it possible to devise an ffmpeg script that will open and play two files in a directory at the same time, and with the temporal difference filter? It would be beneficial to add to ffmprovisr.

On Sunday, December 4, 2016, kieranjol <notifications@github.com javascript:_e(%7B%7D,'cvml','notifications@github.com');> wrote:

+1 - it could also be great to compare captures of the same tape on different decks to help figure out which produces a more satisfactory image. OR perhaps compare the output of a BetaSP from a digibeta deck with internal a2d vs a native BetaSP deck with external a2d or things like that.

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retokromer commented 7 years ago

Hi @kellyhaydon I’ll add this to the ffmprovisr wish list.