[FFmpeg-user] Scaling up is pixelated

Grant emailgrant at gmail.com
Tue Feb 11 17:54:15 CET 2014

My video drivers (omapfb) don't support scaling so I'm prescaling with ffmpeg:

ffmpeg -i sample1.mp4 -filter:v scale=1360:-1 -sws_flags lanczos -c:a
copy sample2.mp4

The resultant file is very pixelated.  It makes sense that scaling up
would result in pixelation, but how do hardware scalers avoid this?

- Grant

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