A low quality 480p will struggle to make it at 1080p.
#FFMPEG SCALE 720P 720P#
A high bitrate 720p video can look good at 1080p and maybe work at 4k. The end result is going to depend on your source footage. ffmpeg -i input.mp4 -vf scale=640x480:flags=lanczos -c:v libx264 -preset slow -crf 21 output_compress_480p.mp4Īll you need to do is change the scale= to the dimension you want, then change the output to indicate the video dimensions. Convert your video files After being sure of your new video specifics, hit the ‘Enter’ button.
To downscale video all you need to know is popular dimensions. ffmpeg -i input.mp4 -vf scale-1:720 output.mp4 With this command, your resized video will attain a new resolution of 1080 / 720 1.5 Your height will scale down to 1920/1.5 1280p Step 6. To upscale to 4k video: ffmpeg -i input.mp4 -vf scale=3840x2560:flags=lanczos -c:v libx264 -preset slow -crf 21 output_compress_4k.mp4 Downscale with FFmpeg ffmpeg change to 720p python ffmpeg convert resolution 1080p ffmpeg change to 720p fast ffmpeg resolution 720480 ffmpeg resolution ffmpeg scale video to 720p ffmpeg convert 480p to 1080p ffmpeg resolution 720p ffmpeg convert mp4 to 720p ffmpeg scale 1080 to 720 ffmpeg convert to 720p ffmpeg size 720p ffmpeg downscale to 720p. To upscale a video to 1080p whilst encoding it: ffmpeg -i input.mp4 -vf scale=1920x1080:flags=lanczos -c:v libx264 -preset slow -crf 21 output_compress_1080p.mp4 Whilst Lanczos in most cases wont be the sharpest it combines sharpness with smooth to make the footage look better overall, Avoiding blocky footage. For an excellent source on resampling methods go here. This uses FFmpeg scaling with Lanczos resampling. To change a video file to be 1080p in FFmpeg: ffmpeg -i input.mp4 -vf scale=1920x1080:flags=lanczos output_1080p.mp4 Here are some FFmpeg commands to help you out: Upscale with FFmpeg
After the conversion mux with Audio/Sub of your Sourcefile. Making a video smaller (downscaling) or bigger (upscaling) with FFmpeg is actually very easy. Load your file, select video conversion, select change frame size without crop, continue, set x264 as encoder, crf 21, set the frame size you want, g.e.
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