To change the motion vectors in the compressed file, you. vf hqdn3d ), then the motion vectors aren't actually affected by the denoising, because they come from an earlier part in the pipeline. SVP is an advanced media pack which uses motion-compensated frame. Remember that codecview will display the motion vectors from the encoded file, so if you denoise that file after decoding (such as ffplay. How can I retain quality while improving file size (=smaller)?Īlso, here are my shell commands, just for completion:įfmpeg -i foo.mp4 -c:v libx265 -preset ultrafast -crf 28 -an foo_00_ultrafast.mkvįfmpeg -i foo.mp4 -c:v libx265 -preset placebo -crf 28 -an foo_09_placebo.mkvįfmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developersīuilt with Apple clang version 12.0.0 (clang-1200.0.32. LAV Filters (formerly LAVFSplitter) is a collection of DirectShow media splitters and. How can I retain the file size of fast presets while still improving picture quality? Do I at the same time need to use a slower preset, but also increase CRF? Filters sit between the input and the output and make some change to. So basically I have two questions at this point: ffmpeg -y -i input.mkv -filtercomplex scale720:480 output.mp4 -filtercomplex can be used to combine many filters together. In fact, in some example encoding (1 minute, 1080p, 60fps, no audio), ultrafast led to a 2.3MB file, while veryslow produced a 3.4MB file - quite a rise in size! When testing some encoding however, I was surprised to see slower presets leading to larger files. Background being that slower presets compare more options and pick the lowest bitrate with given quality. My understanding is that slower presets lead to lower file size while retaining similar image quality as other presets. But I still wanted to get best picture quality for my file size. It's not high quality content, so I chose a higher CRF (28). You can run the following command to check the supported feature: ' ffmpeg -help filtervppqsv' check the supported option for a specific filter. I'm trying to figure out how to best encode some videos to x265.
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