: This version introduced support for several then-emerging formats, including the VP9 decoder and the HEVC (H.265) decoder via libx265 . For many users at the time, this was the first stable bridge into high-efficiency 4K video playback.
The new sendcmd and zmq filters enabled runtime commands to be sent to a running filter graph. This allowed dynamic changes to video processing (e.g., changing overlay position or volume) without restarting FFmpeg. ffmpeg23
ffmpeg -i input.avi -c:v libx264 -preset medium -crf 23 -c:a aac -b:a 128k output.mp4 : This version introduced support for several then-emerging