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I am tasked with trying to 'improve' the quality of video from a point and shoot camera. I was considering perhaps up-sampling and then applying some unsharp masking.

Can any FFMPEG experts suggest some starting settings for unsharp masking, both with, and without up-sampling (say from 320X180 to 720P 1280X720)?

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"You keep using that word. I do not think it means what you think it means." The project is spelled FFmpeg. The command line tool is spelled ffmpeg. –  LordNeckbeard Nov 16 '12 at 22:55
    
thanks for that Clarification –  eco_bach Nov 17 '12 at 18:15
    
use the hqdn3d filter? –  rogerdpack May 15 '13 at 21:07

1 Answer 1

up vote 1 down vote accepted

See the scale and unsharp filters in ffmpeg:

ffmpeg -i input -filter:v "scale=1280:-1,unsharp=5:5:1.0:5:5:0.0" output

The -1 in the scale filter tells ffmpeg to automatically choose the correct height to preserve aspect ratio. You can change the scaler with the -sws_flags option, such as -sws_flags lanczos. For upsampling lanczos is worth trying. Default is bicubic. See the full list at ffmpeg -h full.

My example uses the default unsharp settings: 5:5:1.0:5:5:0.0, which I included for demonstration purposes. These values allow you to sharpen or blur chroma and/or luma. See the documentation with man ffmpeg for more examples.

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