Hi, I'm looking for a linux (fedora or ubuntu) software able to produce a before/after effects in order to compare a video and its encoding equivalent. Are you aware of some valuable solution ?
Thanks
george
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Have a look at popular linux video editors eg. kdenlive, openshot, lightworks, even blender
Be careful about "producing" a video if your goal is comparison, because using lossy compression will impair the comparison, introducing another generation of artifacts -
More tools here - https://www.videohelp.com/software/sections/linux-video-tools
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If you feel adventurous, you can install Wine and use some "Windows" tools also. I'm running Aviutl, Virtualdub and Avisynth (among others) just fine in Linux under Wine.
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Thread moved to the linux forum where you can get more help.
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Lossy compression means bits of data are thrown out. Each time you do it - it gets worse
An analogy - If you're familiar with audio, MP3 is a lossy format. If you re-encode a MP3 over and over, after a few times it sounds like garbage. You can minimize the quality loss by using higher bitrates, but you still lose quality each time
Lossless video compression means decoded image is mathematically equivalent . Each time you decompress, recompress, no quality is lost. An analogy in audio would be lossless "flac" compression -
Have a look at popular linux video editors eg. kdenlive, openshot, lightworks, even blender
Last edited by acheter; 28th Nov 2016 at 09:14.
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I dunno, but the 1st post says "compare a video and its encoding equivalent". This sounds like a video quality analyser to me. There are some for Linux AFAIK but I don't actually think any of them actually work very well. Certainly not as well as your eyes. See this:
http://askubuntu.com/questions/232677/are-there-tools-to-measure-video-quality -
For a color shift, the traditional tool to use is a vectorscope . You just switch back and forth and it's easy to detect a shift and in what direction
eg. in kdenlive
https://kdenlive.org/users/granjow/introducing-color-scopes-vectorscope
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