[docs] srt-live-transmit.md: add ffplay, ffprobe examples (#2242)
[docs] srt-live-transmit.md: add ffplay, ffprobe examples (#2242)


Haivision/srt,Haivision/srt,Cinegy/srt,Cinegy/srt,ethouris/srt,ethouris/srt,ethouris/srt,Haivision/srt,Haivision/srt,Cinegy/srt,ethouris/srt,Cinegy/srt