## perl ffmpeg_stream.sh
ffmpeg: ffmpeg -loglevel panic -f x11grab -video_size 2560x1440 -framerate 30 -i :0+0+0 -f image2pipe -pix_fmt rgb24 -vcodec rawvideo -
15.681169 frames/s
173472523.466254 b/s  165.436290 MB/s (177012736 bytes / 1.020408 seconds)
2.351643 ms/tick (434 ticks)
31.517651 frames/s
348488257.262783 b/s  332.344301 MB/s (353828864 bytes / 1.015325 seconds)
2.271475 ms/tick (447 ticks)
28.979542 frames/s
323547153.017879 b/s  308.558610 MB/s (323764224 bytes / 1.000671 seconds)
0.540306 ms/tick (1852 ticks)
1.119834 ms/tick (893 ticks)
389112084.073681 b/s  371.086201 MB/s (398819328 bytes / 1.024947 seconds)
35.114829 frames/s
0.659277 ms/tick (1517 ticks)
333593191.287574 b/s  318.139259 MB/s (356450304 bytes / 1.068518 seconds)
30.239632 frames/s
0.514283 ms/tick (1956 ticks)
358409463.988009 b/s  341.805901 MB/s (358662144 bytes / 1.000705 seconds)
32.942053 frames/s
0.459154 ms/tick (2187 ticks)
285852314.099227 b/s  272.610010 MB/s (301776896 bytes / 1.055709 seconds)
25.615287 frames/s
0.524550 ms/tick (1932 ticks)
360252345.080776 b/s  343.563409 MB/s (361775104 bytes / 1.004227 seconds)
32.790435 frames/s
0.496997 ms/tick (2083 ticks)
26.270956 frames/s
295546724.760539 b/s  281.855321 MB/s (309657600 bytes / 1.047745 seconds)
0.458824 ms/tick (2187 ticks)
27.119570 frames/s
299918124.944374 b/s  286.024213 MB/s (342835200 bytes / 1.143096 seconds)
0.458535 ms/tick (2186 ticks)
33.252478 frames/s
367735934.363765 b/s  350.700316 MB/s (409223168 bytes / 1.112818 seconds)
Dropping 1 frames
Dropping 1 frames
0.808481 ms/tick (1238 ticks)
Dropping 1 frames
337010691.133721 b/s  321.398440 MB/s (337543168 bytes / 1.001580 seconds)
27.496839 frames/s
0.461199 ms/tick (2194 ticks)
310982659.159489 b/s  296.576175 MB/s (356417536 bytes / 1.146101 seconds)
27.957239 frames/s
0.377036 ms/tick (2655 ticks)
376875827.362279 b/s  359.416797 MB/s (378748928 bytes / 1.004970 seconds)
33.857251 frames/s