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• 13:36, 6 March 2025 Knowledgebaseadmin talk contribs created page FFmpeg - VP9 (Created page with "Category:FFmpeg Category:VP9 Two-pass is the recommended encoding method for libvpx-vp9 as some quality-enhancing encoder features are only available in 2-pass mode.<br/> Constant quality 2-pass is invoked by setting <code>-b:v</code> to <code>zero</code> and specifying a quality level using the <code>-crf</code> switch:<br/> <pre> ffmpeg -i <input.file> -c:v libvpx-vp9 -b:v 0 -crf 30 -pass 1 -an -f null /dev/null && \ ffmpeg -i <input.file> -c:v libvpx-vp9 -b:v...")