add scaling, mangohud, mpv, network, ungoogle chromium

infrastructure/graduated/arch/gaming.md

@@ -5,6 +5,7 @@
   - [Steam](#steam)
     - [autostart](#autostart)
     - [mangohud](#mangohud)
+    - [Scaling](#scaling)
     - [Streaming](#streaming)
     - [FSR](#fsr)
   - [Sunshine and Moonlight](#sunshine-and-moonlight)
@@ -23,10 +24,13 @@
   - [OBS](#obs)
   - [Xbox Controller](#xbox-controller)
   - [Mangohud](#mangohud-1)
+    - [Minecraft with Mangohud](#minecraft-with-mangohud)
   - [ffmpeg](#ffmpeg)
     - [AUR](#aur)
     - [Intel 11th gen](#intel-11th-gen)
     - [AMD 7900xtx](#amd-7900xtx)
+    - [Taking Game Cips](#taking-game-cips)
+  - [MPV](#mpv)
   - [Minecraft](#minecraft)
     - [Launcher](#launcher)
     - [MultiMC](#multimc)
@@ -66,7 +70,7 @@ Start steam with mangohud
 
 ```bash
 pacman -S mangohud lib32-mangohud
-cp /usr/share/applications/steam-native.desktop ~/.local/share/applications/steam.desktop
+cp /usr/share/applications/steam.desktop ~/.local/share/applications/steam.desktop
 ```
 
 Edit ~/.local/share/applications/steam.desktop:
@@ -75,6 +79,21 @@ Edit ~/.local/share/applications/steam.desktop:
 Exec=/usr/bin/mangohud /usr/bin/steam-native %U
 ```
 
+### Scaling
+
+On HiDPI screens you might need to manually scale the steam interface. This can be done by editing
+the .desktop file:
+
+```bash
+cp /usr/share/applications/steam.desktop ~/.local/share/applications/steam.desktop
+```
+
+Edit `~/.local/share/applications/steam.desktop`
+
+```conf
+Exec=/usr/bin/mangohud /usr/bin/steam-runtime -forcedesktopscaling 2 %U
+```
+
 ### Streaming
 
 See [Sunshine and Moonlight](#sunshine-and-moonlight) first! It's much better than steam streaming.
@@ -316,6 +335,10 @@ Edit `~/.config/MangoHud/MangoHud.conf` and tweak as you see fit.
 
 Then add `mangohud env MANGOHUD_CONFIGFILE=/home/ducoterra/.config/MangoHud/MangoHud.conf %command%` to your steam launch.
 
+### Minecraft with Mangohud
+
+MultiMC offers a "Wrapper" option in Settings -> Custom commands. Add `/usr/bin/mangohud --dlsym`.
+
 ## ffmpeg
 
 <https://wiki.archlinux.org/title/FFmpeg>
@@ -369,6 +392,65 @@ ffmpeg \
 output.mp4
 ```
 
+### Taking Game Cips
+
+1. Install [MPV](#mpv)
+2. Open the video clip in mpv
+3. Press <kbd>del</kbd> to always show the seek bar
+4. Click the timestamp in the bottom left to show milliseconds
+5. Use <kbd>,</kbd> and <kbd>.</kbd> to seek frame by frame to find the start frame
+6. Use the following ffmpeg command to trim clips
+
+    ```bash
+    # format start_time and end_time like `00:00:34.000` (hh:mm:ss.mmm)
+    export input_file=
+    export output_file=
+    export start_time=
+    export end_time=
+
+    # -r 30 == frame rate of 30
+    # -vf scale scales the output
+    ffmpeg \
+        -ss $start_time \
+        -to $end_time \
+        -i $input_file \
+        -c:v libx264 \
+        -b:v 0 \
+        -vf scale=1920:1080 \
+        -r 30 \
+        $output_file
+    ```
+
+6. Then concat clips with the following
+
+    ```bash
+    # Create mylist.txt
+    cat <<EOF > clips.txt
+    file '/path/to/file1'
+    file '/path/to/file2'
+    file '/path/to/file3'
+    EOF
+    ```
+
+    ```bash
+    ffmpeg -f concat -i mylist.txt -c copy output.mp4
+    ```
+
+## MPV
+
+<https://wiki.archlinux.org/title/Mpv>
+
+MPV is an alternative to VLC with a couple key benefits:
+
+1. Reverse frame-by-frame seeking
+2. millisecond timestamp
+
+These are great for video clipping with ffmpeg.
+
+```bash
+pacman -S mpv
+```
+
 ## Minecraft
 
 ### Launcher