User:E.zn/prototyping3: Difference between revisions

Latest revision as of 20:40, 29 May 2020

Reload [override cache] -- Firefox

Ctrl + Shift + r

Convert mp4 to mp3

ffmpeg -i <filename>.mp4 <filename>.mp3

Rename file

mv <filename>.mp3 <newname>.mp3

Scaling + preserving aspect ratio

ffmpeg -i Deep_Lab_Exc.mp4 -filter:v scale=472:-1 -c:a copy Deep_Lab_Excerpt.mp4

ffmpeg -i <x>.mp4 -vf "scale=1920:1080:force_original_aspect_ratio=increase,crop=1920:1080" <xx>.mp4

Resizing

ffmpeg -i input.avi -s 720x480 -c:a copy output.mkv

Cutting out a video excerpt [118 seconds starting at 54:06]

ffmpeg -i Soleil_O.avi -c:av copy -ss 00:54:06 -t 118 Soleil_O_Excerpt.mp4

Tmux // Icecast // Liquidsoap // Recording computer playback // RSS feeds

Make a first playlist:

cd /srv/radio
ls /var/www/html/*.mp3 >> playlist.m3u

Edit Playlist

nano playlist.m3u

Playlist is here: /srv/radio/playlist.m3u
Bash script for liquisdsoap: playlist.sh

liquidsoap \
  'output.icecast(%vorbis,
     host = "echo.lurk.org", port = 999,
     password = "<pwd>", mount = "radioimplicancies.mp3",
     mksafe(playlist("playlist.m3u")))'

The resulting program is here: http://echo.lurk.org:999/radioimplicancies.mp3
Run the playlist, via icecast on Lurk
Start a "tmux session", make it shareable...

tmux -S /tmp/radio new -s radio
chgrp publicweb /tmp/radio

For others to be able to watch this terminal

tmux -S /tmp/radio attach -t radio -r

Start the stream

bash playlist.sh

To detach from tmux, leaving liquidsoap [and the stream] running

Ctrl + b 
d

Listen to the program: http://echo.lurk.org:999/radioimplicancies.mp3

@@ Line 1: / Line 1: @@
 <div style="font-family:monospace; font-size:13.5px">
 <br>
-[[Implicancies Channels and Tools]]
+:__ [[Implicancies Channels and Tools]]
+:__ [https://www.hamvocke.com/blog/a-quick-and-easy-guide-to-tmux/ A Quick and Easy Guide to tmux]
+:__ [[Command-line podcasts]]
+:__ [[Angeliki/Grad_Scripts]]
 <br>
 ----
@@ Line 20: / Line 23: @@
 mv <filename>.mp3 <newname>.mp3
 </pre>
+Scaling + preserving aspect ratio
+<pre>
+ffmpeg -i Deep_Lab_Exc.mp4 -filter:v scale=472:-1 -c:a copy Deep_Lab_Excerpt.mp4
+</pre>
+<pre>
+ffmpeg -i <x>.mp4 -vf "scale=1920:1080:force_original_aspect_ratio=increase,crop=1920:1080" <xx>.mp4
+</pre>
+Resizing
+<pre>
+ffmpeg -i input.avi -s 720x480 -c:a copy output.mkv
+</pre>
+Cutting out a video excerpt [118 seconds starting at 54:06]
+<pre>
+ffmpeg -i Soleil_O.avi -c:av copy -ss 00:54:06 -t 118 Soleil_O_Excerpt.mp4
+</pre>
+[[File:ffmpeg_soleil_no.png|700px]]
 <br>
 ----