Differences

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--- wlanhacking [2022/02/14 19:12] – [iperf] 188.106.43.97
+++ wlanhacking [2022/02/17 21:30] – 188.106.43.97
@@ Line 1: / Line 1: @@
+==== ffmpeg ====
+  trim
+  ffmpeg -i my_video.mp4 -ss 00:00:15 -t 00:00:10 -async -1 clip.mp4
+  https://unix.stackexchange.com/questions/28803/how-can-i-reduce-a-videos-size-with-ffmpeg
+  reencode lower qulaity crf 18-28 is sane, lower crf is higer quality
+  ffmpeg -i input -c:v libx264 -preset slow -crf 22 -c:a copy output.mkv
+  https://trac.ffmpeg.org/wiki/Encode/H.264
+==== drive speed test ====
+  sudo hdparm -tT --direct /dev/sda
 ==== iperf ====
   https://www.thomas-krenn.com/de/wiki/TCP_und_UDP_Netzwerk_Performance_mit_iperf_messen
-  Server1 TCP:  [root@server1 ~]# iperf -s
+  Server 1 TCP:  [root@server1 ~]# iperf -s
-  Server2 TCP:  [root@server2 ~]# iperf -c 192.168.255.1
+  Client 2 TCP:  [root@server2 ~]# iperf -c 192.168.255.1
   Server 1 UDP: [root@server1 ~]# iperf -s -u
-  Server 2 UDP: [root@server2 ~]# iperf -c 192.168.255.1 -u -b 1000M
+  client 2 UDP: [root@server2 ~]# iperf -c 192.168.255.1 -u -b 1000M
 ==== rest ====

Project-Insanity