[FFmpeg-user] scaling up without losing definition
cleyfaye at gmail.com
Tue Jul 18 09:10:18 EEST 2017
Le 18 juil. 2017 05:06, "JD" <jd1008 at gmail.com> a écrit :
Can ffmpeg do that?
Like from say 854x356 and transcode it to 1920x1080
without losing high definition (i.e. no blurring as a
result of transcoding to a larger display).
Ffmpeg can do scaling using various algorithm, including the "simple"
nearest neighbor that will upscale pixels nicely.
There are two caveats on that however: first 1920x1080 is not a multiple of
854x356, meaning that you'll either have black bars, cropped parts, or
imperfect scaling. Second, the actual video codec might mangle pixels
because of compression, and cause blurriness and other artifacts.
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