[FFmpeg-user] Framemd5 filter error for atomised Avid 1:10 bit.mxf

Kieran O'Leary kieran.oleary at irishfilm.ie
Fri Jul 10 16:01:44 CEST 2015

> framemd5 won't help you determine 'how much' visual difference there is between an exported file and a reference file. Depending on how you run it, framemd5 would only confirm if the two files decode to the same raw frame or different ones, it's a yes/no answer and not a 'how much'. I suggest sending both streams as input to the psnr or ssim filters which are better able to quantify visual difference.

>Also ffmpeg is not detecting the pixel format of your mxf file, you may have to declare the pixel format before the input.
Dave Rice


Hi Dave,

Thanks for that. I will set the pixel format later and see if that gets it working.

Re the framemd5, I should have been more clear. I wanted to use the framemd5s to prove that the video stream was altered when transcoding from 1:1 10bit to v210. I realise that it would just give a yes or no answer to this question. I honestly didn't have a clue how to compare them after that and see how much alteration occurs. Thanks yet again for your invaluable help.

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