Commandline (when remuxing (Super fast)): ffmpeg -i INPUT.MKV -c:v copy OUTPUT.MP4. Commandline (when transcoding): ffmpeg -i INPUT.MKV -c:v libvpx-vp9 OUTPUT.MP4. WedmbSDffmpeg v4.0.2 or higher can encode/transcode VP9 in mp4. To use VP9 replace with -vcodec libvpx-vp9. Note the parameter -vcodec libvpx uses VP8 by default. On Windows 7 I had to use the power shell (Start > Accessories > Windows Power Shell > Power Shell) and provide the full location for ffmpeg, input and output. Note that FFmpeg offers both NVDEC and CUVID hwaccels.
Codec support varies by hardware (see the GPU compatibility table). NVDEC offers decoders for H.264, HEVC, MJPEG, MPEG-1/2/4, VP8/VP9, VC-1, AV1. Below is a description of the currently available bitstream filters, with their parameters, if any.ffmpeg -y -hwaccel_output_format d3d11 -hwaccel d3d11va -i input.mp4 -c:v hevc_nvenc out.mp4 NVDEC/CUVID. ffmpeg -i INPUT -c:v copy -bsf:v filter1 OUTPUT.
The ff* tools have a -bsf option applied per stream, taking a comma-separated list of filters, whose parameters follow the filter name after a ’=’. As commented in the vpx_encoder.h file in the libvpx code: The encoder supports the notion of a soft real-time. These commands do not directly affect the other options, but merely determine the amount of time the encoder is allowed to spend on any particular frame. It seems that the ffmpeg -quality command is the same as the -deadline command.This will use a player named ffplay to downscale while playing. Assuming you want VP9 output: ffmpeg -i input.mp4 -vf "scale=-2:1080" -c:v libvpx-vp9 -lossless 1 -c:a copy output.webm This will make a huge sized file. Oposite from what most, atleast me, would expect is. qmax and qmin are the 'quality-ranges' in which you define to encode. for x264 it should be a quantizer see here, But with some others codecs it doesn't represent a quantization level but a quality range. But with ffmpeg qmax may have different meaning as it's a codec dependent parameters.
Use a Speed Setting of 2 Boosting Encoding Speed with Row-MT Table 2: Adding row-mt cut encoding time by ~36% and boosted VMAF quality slightly.
Ffmpeg vp9 Choosing the Right Command String Isolating the Key Differences Table 1: These results show that the CRF setting in the Google command string had little impact on output quality.
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