[FFmpeg-user] Scaling up is pixelated

Grant emailgrant at gmail.com
Sat Feb 15 16:59:17 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?
> Please include the complete ffmpeg console output, and any input samples
> that are required for others to attempt to duplicate the issue. Note
> that the mailing list has a message size limit of 250k.
> I noticed that you sent your message to ffmpeg-user at mplayerhq.hu. Where
> did you find this at? This is an old address, and although it still
> works (for now) the current address is ffmpeg-user at ffmpeg.org.

It looks fine now.  Not sure what I was doing before.

- Grant

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