commit 97fc9a5cdc066f4e1d68d7df612ac3b3c1047937
parent 8885fa09e3ab8c00a106b1ead75652f56799ddf0
Author: Anders Damsgaard <anders@adamsgaard.dk>
Date: Tue, 17 Mar 2020 11:30:44 +0100
Reflow text on gopher and minor grammar improvement
Diffstat:
2 files changed, 33 insertions(+), 30 deletions(-)
diff --git a/pages/004-screencasts.html b/pages/004-screencasts.html
@@ -8,7 +8,7 @@ for those of us who do not use Microsoft and Apple products.</p>
<p>I needed a way to record my pdf slideshows while talking over
the presentation. Ideally, I also wanted the ability to show the
video of my webcam as an overlay in an attempt to make the presentation
-a bit more engaging when explaining more complex parts.</p>
+a bit more engaging when explaining complex parts.</p>
<p>Fortunately, <a href="https://ffmpeg.org">ffmpeg(1)</a> makes
it easy to record the screen and laptop audio. I want to keep the
@@ -97,7 +97,7 @@ done
</code></pre>
<figure class="pagefigure">
- <video poster="video/screencast.jpg"
+ <video poster="video/screencast.jpg" style="object-fit:fill;"
controls preload="none" class="mediaframe">
<source src="video/screencast.webm" type="video/webm">
<source src="video/screencast.ogv" type="video/ogg">
diff --git a/pages/004-screencasts.txt b/pages/004-screencasts.txt
@@ -1,18 +1,19 @@
-On Monday 2020-03-16 the buildings of the danish public sector were closed as
-an emergency response to COVID-19. This includes Aarhus University where I
-teach two undergraduate courses. The university asks lecturers to move their
-teaching to digital platforms. As many times before, this requires creative
-thinking for those of us who do not use Microsoft and Apple products.
-
-I needed a way to record my pdf slideshows while talking over the presentation.
-Ideally, I also wanted the ability to show the video of my webcam as an overlay
-in an attempt to make the presentation a bit more engaging when explaining more
-complex parts.
-
-Fortunately, [1]ffmpeg(1) makes it easy to record the screen and laptop audio.
-I want to keep the fan noise low during recording by applying minimal
-compression and encoding. The following shell script serves the purpose of
-starting and stopping recording:
+On Monday 2020-03-16 the buildings of the danish public sector were
+closed as an emergency response to COVID-19. This includes Aarhus
+University where I teach two undergraduate courses. The university
+asks lecturers to move their teaching to digital platforms. As many
+times before, this requires creative thinking for those of us who
+do not use Microsoft and Apple products.
+
+I needed a way to record my pdf slideshows while talking over the
+presentation. Ideally, I also wanted the ability to show the video
+of my webcam as an overlay in an attempt to make the presentation
+a bit more engaging when explaining complex parts.
+
+Fortunately, [1]ffmpeg(1) makes it easy to record the screen and
+laptop audio. I want to keep the fan noise low during recording
+by applying minimal compression and encoding. The following shell
+script serves the purpose of starting and stopping recording:
#!/bin/sh
lockfile=/tmp/screenrecord.pid
@@ -51,12 +52,13 @@ else
startrecording
fi
-On Linux systems, the sound driver sndio should be replaced by alsa in the
-above ffmpeg(1) command. I have bound the above script to the key binding Alt+r
-which makes it easy to start and stop recording in my X session.
+On Linux systems, the sound driver sndio should be replaced by alsa
+in the above ffmpeg(1) command. I have bound the above script to
+the key binding Alt+r which makes it easy to start and stop recording
+in my X session.
-On OpenBSD I can show the webcam video feed with the [2]video(1) command. The
-following script toggles the video feed:
+On OpenBSD I can show the webcam video feed with the [2]video(1)
+command. The following script toggles the video feed:
#!/bin/sh
# remember to `chown $USER /dev/video0`
@@ -66,13 +68,14 @@ else
nohup video -s 320 >/dev/null 2>&1 &
fi
-On Linux, the command mpv /dev/video0 can take place of the video(1) command
-above. I have the above script bound to the keybinding Alt+v so I can quickly
-show and hide my face while recording.
+On Linux, the command mpv /dev/video0 can take place of the video(1)
+command above. I have the above script bound to the keybinding Alt+v
+so I can quickly show and hide my face while recording.
-When I am done recording a lecture, I encode and compress the video file to
-save bandwidth during upload. The following script encodes all input files and
-reduces file size to roughly 15% without concievable loss in quality:
+When I am done recording a lecture, I encode and compress the video
+file to save bandwidth during upload. The following script encodes
+all input files and reduces file size to roughly 15% without
+concievable loss in quality:
#!/bin/sh
@@ -87,8 +90,8 @@ for f in "$@"; do
encode "$f"
done
-[3]Example screen recording using ffmpeg(1) and video(1) with the above
-scripts.
+[3]Example screen recording using ffmpeg(1) and video(1) with the
+above scripts.
References:
