add whipinfo rtp pkt_size more than 1200

[a-wing]

Video

• VP8
• VP9
• H264
• H265
• AV1

#120

[a-wing]

NOTE: About pkt_size=1200
WebRTC must need pkt_size=1200
If pkt_size > 1200 (most tool > 1200, for example: ffmpeg default 1472), we need to de-payload after re-payload
But now, We support re-size pkt_size in VP8 and VP9, You can use any pkt_size value in VP8 and VP9

Codec	AV1	VP9	VP8	H264	OPUS	G722
pkt_size > 1200	💩	⭐	⭐	💩	💩	💩