cgo/ffmpeg api is deprecated

[cwinging]

‘avcodec_decode_video2’ is deprecated
‘avresample_open’ is deprecated
‘avresample_get_out_samples’ is deprecated and so on.

[fmyxyz]

libavresample is not found in ffmpeg v5.x

[cedricve]

could we adapt the audio.go so it can be used with later ffmpeg versions? Hence libavresample is no longer available, but is now libswresample

[cedricve]

@cwinging we have update the video.go file so it can be leveraged with ffmpeg 5.x and beyond.
https://github.com/kerberos-io/joy4/blob/master/cgo/ffmpeg/video.go