c3tracker:cutting

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c3tracker:cutting [2026/04/11 10:45] – [Setup] Simplify for Nix users (scripts repo is now a flake) nicooc3tracker:cutting [2026/07/26 22:17] (current) – external edit 127.0.0.1
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-= Tracker Cutting Howto+# Tracker Cutting Howto
  
 When we talk about "cutting a video", we mean a highly automated process how the intro and outro get added to a recorded lecture using the [[c3tracker:start|]]. When we talk about "cutting a video", we mean a highly automated process how the intro and outro get added to a recorded lecture using the [[c3tracker:start|]].
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-== Cutting with FUSE+## Cutting with FUSE
  
 There are two main ways of cutting a video: Using the KDEnlive or Shotcut open source video editors or by manually writing frame numbers to obtained from a video player like mpv the in- and outframe files. There are two main ways of cutting a video: Using the KDEnlive or Shotcut open source video editors or by manually writing frame numbers to obtained from a video player like mpv the in- and outframe files.
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   * On Windows/ macOS: Install Shotcut as described at [[https://shotcut.org/download/|their website]] (Version 22.12.21 is known to work)   * On Windows/ macOS: Install Shotcut as described at [[https://shotcut.org/download/|their website]] (Version 22.12.21 is known to work)
  
-=== General Workflow+### General Workflow
  
 <bootnote>The following commands will use //storage.lan.c3voc.de// as a placeholder for the machine with the FUSE mounts. Small events may use //encoderX.lan.c3voc.de// or //minionX.lan.c3voc.de// as storage share.</bootnote> <bootnote>The following commands will use //storage.lan.c3voc.de// as a placeholder for the machine with the FUSE mounts. Small events may use //encoderX.lan.c3voc.de// or //minionX.lan.c3voc.de// as storage share.</bootnote>
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     * click "finish"     * click "finish"
  
-=== Notes on Using KDEnlive+### Notes on Using KDEnlive
  
 Open the ''project.kdenlive'' project file to start cutting: Open the ''project.kdenlive'' project file to start cutting:
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 If you have a poor connection to the storage, deactivate the video and audio thumbnails using the buttons on the right side of the lower window border. If you have a poor connection to the storage, deactivate the video and audio thumbnails using the buttons on the right side of the lower window border.
  
-=== Notes on Using Shotcut+### Notes on Using Shotcut
  
 Open the ''project_shotcut.mlt'' project file to start cutting: Open the ''project_shotcut.mlt'' project file to start cutting:
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     * <code>apt-get install libQt5Gui</code> (see http://stackoverflow.com/questions/17106315/failed-to-load-platform-plugin-xcb-while-launching-qt5-app-on-linux-without)     * <code>apt-get install libQt5Gui</code> (see http://stackoverflow.com/questions/17106315/failed-to-load-platform-plugin-xcb-while-launching-qt5-app-on-linux-without)
  
-=== Notes on Using mpv+### Notes on Using mpv
  
-''mpv'' is a command line media player, which can also be used in our cutting workflow.  [[user:nicoo]] wrote [[https://gist.github.com/nicoonoclaste/59c9f8d5ac352202c4d9671442106396|an mpv script]] which automates our cutting workflow.+''mpv'' is a command line media player, which can also be used in our cutting workflow.  [[user:nicoo]] wrote [[https://forgejo.c3voc.de/voc/mpv-scripts|an mpv script]] which automates our cutting workflow.
  
 See [[https://mpv.io/manual/master/#keyboard-control|the ''mpv'' manual]] for the default keybinds. See [[https://mpv.io/manual/master/#keyboard-control|the ''mpv'' manual]] for the default keybinds.
  
-==== Setup+#### Setup
  
 Install the script, typically by copying ''c3voc-cutter.lua'' to ''~/.config/mpv/scripts/''.  If using a mountpoint other than ''/video'', it needs to be set in ''~/.config/mpv/script-opts/c3voc.conf''. Install the script, typically by copying ''c3voc-cutter.lua'' to ''~/.config/mpv/scripts/''.  If using a mountpoint other than ''/video'', it needs to be set in ''~/.config/mpv/script-opts/c3voc.conf''.
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 The script does not add keybindings by default, and those must be configured in ''~/.config/mpv/input.conf'' like so: The script does not add keybindings by default, and those must be configured in ''~/.config/mpv/input.conf'' like so:
 <code> <code>
-- script-binding c3voc-cutter-set-in +% script-binding c3voc-cutter-jump-in 
-= script-binding c3voc-cutter-set-out +^ script-binding c3voc-cutter-jump-out 
-Ctrl+- script-binding c3voc-cutter-jump-in +Ctrl+5 script-binding c3voc-cutter-set-in 
-Ctrl+= script-binding c3voc-cutter-jump-out+Ctrl+6 script-binding c3voc-cutter-set-out
 </code> </code>
  
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 } }
 </code> </code>
-==== Usage (with script)+#### Usage (with script)
  
 * Open ''uncut.ts'' in mpv to start cutting * Open ''uncut.ts'' in mpv to start cutting
 * Skim through the video to find the start * Skim through the video to find the start
-  * mark it by hitting ''-'' (or whichever keybind you set) +  * mark it by hitting ''Ctrl+5'' (or whichever keybind you set) 
-  * jump back to it with ''Ctrl+-'' +  * jump back to it with ''Shift+5'' 
-  * you can hit ''-'' again at any point to set a new startpoint+  * you can hit ''Ctrl+5'' again at any point to set a new startpoint
 * Same for the end * Same for the end
 * ''mpv'' will write the ''inframe'' and ''outframe'' file when exiting or switching to a new file. * ''mpv'' will write the ''inframe'' and ''outframe'' file when exiting or switching to a new file.
  
  
-==== Usage (manual)+#### Usage (manual)
  
 Open the ''uncut.ts'' in mpv to start cutting: Open the ''uncut.ts'' in mpv to start cutting:
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 Using ''echo'' works best since some text editors like to create temporary lock files which isn't allowed on the FUSE file system. Using ''echo'' works best since some text editors like to create temporary lock files which isn't allowed on the FUSE file system.
  
-== Known Issues and Solutions+#### Tips 
 + 
 +  * [[https://github.com/po5/thumbfast|thumbfast]] can generate thumbnails live, for instance when hovering over a seek bar, which can help find the start and end of a talk faster. (Note: it needs to be used with a UI script, and supports most MPV UIs) 
 +  * [[https://github.com/po5/evafast|evafast]] gives fast-forward and seeking on the same key, which is rather convenient. 
 +  * [[https://github.com/CounterPillow/mpv-quack|quack]] reduces the volume when seeking, to avoid torturing one's ears during cutting 
 + 
 + 
 +For nix users: those are all packaged, and can be added with 
 + 
 +<code> 
 +programs.mpv.scripts = with pkgs.mpvScripts; [ 
 +  evafast 
 +  quack 
 +  thumbfast # NOTE: useless on its own, combine with its builtin osc.lua, or with alt. OSCs like uosc 
 +]; 
 +</code> 
 + 
 +## Known Issues and Solutions
  
   * Shotcut or VLC don't show a time during playback:   * Shotcut or VLC don't show a time during playback:
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-== Remote Cutting using a Proxy File+## Remote Cutting using a Proxy File
  
 The ''uncut.ts'' can get quite large as we're still recording using the MPEG2 codec. The ''uncut.ts'' can get quite large as we're still recording using the MPEG2 codec.
  • c3tracker/cutting.1775904327.txt.gz
  • Last modified: 2026/04/11 10:45
  • by nicoo