From 3c051e70e5cfe32a0f2379c7a23320a9be88a0d2 Mon Sep 17 00:00:00 2001 From: johannst Date: Tue, 9 Jan 2024 21:31:09 +0000 Subject: deploy: 9679f071a80dddfa3dc33b084826ff8a16725ba4 --- tools/awk.html | 2 +- tools/bash.html | 2 +- tools/dot.html | 6 +- tools/emacs.html | 2 +- tools/ffmpeg.html | 253 +++++++++++++++++++++++++++++++++++++++++++++++++++ tools/fish.html | 2 +- tools/gdb.html | 2 +- tools/gdbserver.html | 2 +- tools/git.html | 2 +- tools/gpg.html | 2 +- tools/index.html | 3 +- tools/pacman.html | 2 +- tools/qemu.html | 2 +- tools/radare2.html | 2 +- tools/tmux.html | 2 +- tools/zsh.html | 2 +- 16 files changed, 271 insertions(+), 17 deletions(-) create mode 100644 tools/ffmpeg.html (limited to 'tools') diff --git a/tools/awk.html b/tools/awk.html index 3da3746..1c43993 100644 --- a/tools/awk.html +++ b/tools/awk.html @@ -88,7 +88,7 @@

diff --git a/tools/bash.html b/tools/bash.html index 13551e7..87d2dbf 100644 --- a/tools/bash.html +++ b/tools/bash.html @@ -88,7 +88,7 @@

diff --git a/tools/dot.html b/tools/dot.html index 6271fd3..4d75251 100644 --- a/tools/dot.html +++ b/tools/dot.html @@ -88,7 +88,7 @@ diff --git a/tools/emacs.html b/tools/emacs.html index d9e280c..f9f0c3c 100644 --- a/tools/emacs.html +++ b/tools/emacs.html @@ -88,7 +88,7 @@

diff --git a/tools/ffmpeg.html b/tools/ffmpeg.html new file mode 100644 index 0000000..11453a1 --- /dev/null +++ b/tools/ffmpeg.html @@ -0,0 +1,253 @@ + + + + + + ffmpeg - Notes + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

+ + + + + + + + + + + + + + + + + + + +

+ +

+ + + + +

+ + + +

+ + + + + + + +

+ + + + + + +

ffmpeg (1)

screen capture specific window (x11)

Following snippet allows to select a window which is then captured.

#!/bin/bash
+
+echo "Click on window to record .."
+# Extract window size and x,y offset.
+video_args=$(xwininfo \
+    | awk '/Absolute upper-left X:/ { xoff = $4 }
+           /Absolute upper-left Y:/ { yoff=$4 }
+           /Width:/ { if ($2 % 2 == 1) { width=$2-1; } else { width=$2; } }
+           /Height:/ { if ($2 % 2 == 1) { height=$2-1; } else { height=$2; } }
+           END { printf "-video_size %dx%d -i :0.0+%d,%d", width, height, xoff, yoff  }')
+
+ffmpeg -framerate 25 -f x11grab $video_args -pix_fmt yuv420p $@ output.mp4
+

+
Use yuv420p pixel format if video is played on the web +(ref)
+

The input -i 0,0+xoff,yoff means to capture $DISPLAY=0.0 starting at the +coordinate (xoff, yoff), which is the left-upper corner, and the size of the +capture is defined by the -video_size argument.

+ +

+ + +

+ + + +

+ + + + + + + + + + + + + + + + + + +

+ + diff --git a/tools/fish.html b/tools/fish.html index 0eba250..d40f860 100644 --- a/tools/fish.html +++ b/tools/fish.html @@ -88,7 +88,7 @@