On Mon, Jul 17, 2017 at 11:10 PM, Cley Faye <[email protected]> wrote:
> Le 18 juil. 2017 05:06, "JD" <[email protected]> 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. > Going back to my early Avisynth days, I recall that Bicubic or Lanczos was recommended for scaling down and Bilinear was the recommendation for scaling up. Not sure if that fits the current thinking. https://ffmpeg.org/ffmpeg-scaler.html > _______________________________________________ > *William Caulfield *| *ContentBridge Systems* Product Manager, Digital Media & Systems | www.contentbridge.tv _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
