ffmpeg -i input_s03e09.mkv -c:v libvpx -crf 10 -b:v 1M -c:a libvorbis -q:a 5 output.webm
Why isn't everyone using Libvpx for GoT?
The libvpx library serves as the reference implementation for the VP8 and VP9 codecs.
One of the standout features optimized in libvpx was Adaptive Quantization. In a scene like the "Bear and the Maiden Fair" (Episode 7), featuring Brienne of Tarth fighting a bear in a pit, the lighting is drastically uneven.