first commit

cam

@@ -0,0 +1,32 @@
+#!/bin/sh
+# cam: snap a frame from /dev/video0. press s to capture, q to cancel.
+#   cam              -> clipboard
+#   cam photo.png    -> file
+
+if [ -n "$1" ]; then
+    out=$1
+    keep=1
+else
+    out=$(mktemp --suffix=.png)
+    keep=
+fi
+conf=$(mktemp)
+trap 'rm -f "$conf"; [ -z "$keep" ] && rm -f "$out"' EXIT
+
+printf 's screenshot-to-file "%s" ; quit\n' "$out" > "$conf"
+
+mpv av://v4l2:/dev/video0 \
+    --demuxer-lavf-format=video4linux2 \
+    --demuxer-lavf-o=input_format=mjpeg,video_size=1280x720 \
+    --profile=low-latency \
+    --force-window=immediate \
+    --geometry=50%:50% \
+    --input-conf="$conf" \
+    --title=cam --osd-msg1="s: snap   q: cancel" \
+    --really-quiet 2>/dev/null
+
+[ -s "$out" ] || exit 0
+[ -n "$keep" ] && exit 0
+
+xclip -selection clipboard -t image/png -loops 1 < "$out" &
+sleep 0.1

camv

@@ -0,0 +1,29 @@
+#!/bin/sh
+# camv: preview /dev/video0; s to start recording, q to stop.
+#   camv              -> /tmp/cam-<date>.mp4
+#   camv movie.mp4    -> save to that path
+
+out=${1:-/tmp/cam-$(date +%Y%m%d-%H%M%S).mp4}
+raw=$(mktemp --suffix=.mkv)
+conf=$(mktemp)
+trap 'rm -f "$conf" "$raw"' EXIT
+
+printf 's set stream-record "%s" ; show-text REC\n' "$raw" > "$conf"
+
+mpv av://v4l2:/dev/video0 \
+    --demuxer-lavf-format=video4linux2 \
+    --demuxer-lavf-o=input_format=mjpeg,video_size=640x480 \
+    --profile=low-latency \
+    --force-window=immediate \
+    --geometry=50%:50% \
+    --input-conf="$conf" \
+    --title=camv --osd-msg1="s: rec   q: stop" \
+    --really-quiet 2>/dev/null
+
+[ -s "$raw" ] || exit 0
+
+ffmpeg -hide_banner -loglevel fatal -nostdin \
+    -vaapi_device /dev/dri/renderD128 -i "$raw" \
+    -vf 'format=nv12,hwupload' \
+    -c:v h264_vaapi -qp 28 -y "$out"
+echo "$out"

scr

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+if ! command -v slop >/dev/null; then
+	echo "scr: slop not found" >&2
+	exit 1
+fi
+
+copy=0
+if [ $# -eq 0 ]; then
+	copy=1
+	out=$(mktemp --suffix=.png)
+else
+	out=$1
+fi
+
+coords=$(slop -f "%x %y %w %h" 2>/dev/null) || exit 1
+read x y w h <<<"$coords"
+
+ffmpeg -f x11grab -loglevel error -s ${w}x${h} \
+	-i ${DISPLAY}+${x},${y} -frames:v 1 -y "$out"
+
+if [ $copy -eq 1 ]; then
+	xclip -selection clipboard -t image/png -i "$out"
+fi
+
+echo "$out"

scrv

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+#!/bin/bash
+
+# Video Quality
+# The range of the CRF scale is 0–51, where 0 is lossless, 23 is the default,
+# and 51 is worst quality possible. A lower value generally leads to higher
+# quality, and a subjectively sane range is 17–28
+QUALITY=28
+
+if ! command -v slop &> /dev/null
+then
+    echo "slop command not found. Please install slop."
+    exit 1
+fi
+
+if [ -z "$1" ]; then
+    echo "Usage: $0 <output.mp4>"
+    exit 1
+fi
+
+filename="$1"
+
+echo "Select the desktop area to record."
+coords=$(slop -f "%x %y %w %h" 2>/dev/null)
+
+x=$(echo $coords | awk '{print $1}')
+y=$(echo $coords | awk '{print $2}')
+width=$(echo $coords | awk '{print $3}')
+height=$(echo $coords | awk '{print $4}')
+
+width=$((width / 2 * 2))
+height=$((height / 2 * 2))
+
+echo "Recording started. Press 'q' to stop recording."
+
+    #\#-f alsa -i pulse -c:v libx264 -preset ultrafast -crf ${QUALITY} \
+    #-c:v libx264  -preset ultrafast -crf ${QUALITY} \
+    #-tune zerolatency -pix_fmt yuv420p -f mp4 $filename
+ffmpeg -f x11grab -loglevel quiet -s ${width}x${height} -i ${DISPLAY}+$x,$y \
+    -c:v libx264 -pix_fmt yuv420p -crf ${QUALITY} -preset ultrafast -f mp4 $filename
+
+echo "Recording stopped."

trk

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+#!/bin/sh
+# trk — translate English↔Korean, direction picked from input.
+
+if [ $# -gt 0 ]; then
+	text=$*
+else
+	text=$(cat)
+fi
+
+if printf '%s' "$text" | grep -qP '[\x{AC00}-\x{D7A3}\x{3131}-\x{3163}]'; then
+	pair=ko:en
+else
+	pair=en:ko
+fi
+
+exec trans -b "$pair" "$text"