ffmpeg -i input.mp4 -vf scale1280:-1 -c:v libx264 -preset veryslow -crf 24 output. You cannot simply speed up the process or take shortcuts. The following command will compress and reduce the output files size. The FFmpeg command Using a slow preset will give good compression and a CRF of 19 will keep most of the original video quality. The speed of the video upscale will depend on the video length, bitrate, your CPU and what settings you use for the upscale process. Am I doing something wrong The input file was extracted with dvdfab and converted to MPEG using MPEG Streamclip 1.2. This is all in line with video encoding concepts, slower encoding means more quality is kept and the compression is superior. How to easily upscale a 1080p video to 4k resolution using FFmpeg and a one-line command. Ive pushed an identical short 3-minute clip from the Incredibles to the Tivo, one with ffmpegparam set to '-drcscale 0.0' and again with '-drcscale 0.8', and cant tell any difference in the playback of either of the samples. You will have to find the perfect preset for how much time you want to spend upscaling and the output quality. ![]() Using a CRF of 25 will also lower the output quality slightly (less bitrate = less size). ![]() To achieve a faster upscale use a fast preset like veryfast or superfast however these will give a poorer compression but will complete the upscaling faster ffmpeg -i input.mp4 -vf scale=3840x2560:flags=lanczos -c:v libx264 -preset veryfast -crf 25 output.mp4 Documentation The offline documentation is available in the doc/ directory. Additional small tools such as aviocat, ismindex and qt-faststart. ffprobe is a simple analysis tool to inspect multimedia content. ffplay is a minimalistic multimedia player. ffmpeg -i input.mp4 -vf scale=3840x2560:flags=lanczos -c:v libx264 -preset slow -crf 19 output.mp4 Faster? GitHub ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content. Lanczos is a common scale algorithm to use, avoiding a blocky looking video after the upscale. Using a slow preset will give good compression and a CRF of 19 will keep most of the original video quality. ![]() How to easily upscale a 1080p video to 4k resolution using FFmpeg and a one-line command.
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