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I need to measure streaming video from various different codecs and be able to tell which one is better.

What will be the best metrics to look for?

Is there a free tool that can help with this.

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There are a number of comparison algorithms available beginning with PSNR through SSIM/SSIMPLUS to VMAF. VMAF is implemented as an ffmpeg filter.

  • Thanks Michael, kindly can you please also suggest a free tool that can help in the process. Thank you – user75464 Sep 30 at 6:26
  • @user75464, what do you mean "help in the process?" I'd already suggested ffmpeg as it is able to run the VMAF algorithm. Are you looking to do something else? – Michael Liebman Sep 30 at 17:50

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