A low quality 480p will struggle to make it at 1080p. If you don't give a value, the yadif filter defaults to yadif0 which cuts the frame rate of TV footage in 2.
FFMPEG FILTERS YADIF API 720P
A high bitrate 720p video can look good at 1080p and maybe work at 4k. You can get a high speed video at 50 frames per second easily by means of this: ffmpeg -i in.mpg -vf yadif1 out.mp4 Please note the difference, i.e. The end result is going to depend on your source footage. hevcnvenc modules.ffmpeg-i inputfile -c:v libx264 -vf fieldmatch,yadif. 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. Using the FFmpeg library is common practice when transcoding video data. To downscale video all you need to know is popular dimensions. 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 -i orig -s 200x200 -filter:v yadifdeintinterlaced -vcodec flv -ar 22050 -y 0.flv ffmpeg version 2.0.1 built on Without yadif filter or output size params (-s 200x200) everything is OK Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker. 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 Making a video smaller (downscaling) or bigger (upscaling) with FFmpeg is actually very easy.
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