ffplay rtsp://cam/h264/stream

Stream #0:0: Video: h264 (Baseline), yuv420p(progressive), 1280x720, 30 fps, 30 tbr, 90k tbn, 180k tbc

ffplay rtsp://cam/mjpeg/stream

Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 90k tbc

ffmpeg -i rtsp://cam/mjpeg/stream -vf scale=in_range=tv  -f matroska - | ffplay -