Keyframes (I-frame) request ignored.

[ha-ves]

related to sipsorcery-org/sipsorcery#1145

It seems like this part is being deprecated as of FFmpeg 6.1

SIPSorceryMedia.FFmpeg/src/FFmpegVideoEncoder.cs

Lines 357 to 361 in 6572e4e

	if (keyFrame || _forceKeyFrame)
	{
	avFrame.key_frame = 1;
	_forceKeyFrame = false;
	}