PLAY NU MPV

2025-09-27T02:22:14+00:00

https://x0.at/30jh.png
#!/bin/bash
# ┏━┓╻ ┏━┓╻ ╻┏┓╻╻ ╻┏┳┓┏━┓╻ ╻ USAGE: playnumpv
# ┣━┛┃ ┣━┫┗┳┛┃┗┫┃ ┃┃┃┃┣━┛┃┏┛ (where days = number of days to
# ╹ ┗━╸╹ ╹ ╹ ╹ ╹┗━┛╹ ╹╹ ┗┛ search back for newer media files)

# Check if argument is provided
if [ -z "$1" ] || [[ ! "$1" =~ ^[0-9]+$ ]]; then
echo "Usage: $0 "
exit 1
fi

# Create a temporary playlist file in a safe location
playlist=$(mktemp) || { echo "Failed to create temporary file"; exit 1; }

# Set trap to clean up temporary file on exit
trap 'rm -f "$playlist"' EXIT

# Get absolute path of the playlist to exclude it from search
abs_playlist=$(realpath "$playlist")

# Find all media files modified in the last $1 days and add them to the playlist
# Using absolute paths to avoid issues with relative paths
find "$PWD" -type f -regextype posix-extended -regex '.*\.(mp3|flac|opus|ogg|m4a|wav|nsf|mod|xm)' \
-mtime -"${1}" ! -path "$abs_playlist" -print0 | \
sort -z | \
tr '\0' '\n' > "$playlist"

# Check if any files were found
if [ ! -s "$playlist" ]; then
echo "No files found newer than ${1} days."; exit 0
fi

# Count the number of files in the playlist
file_count=$(wc -l < "$playlist")
echo "Found $file_count files to play."

# Play playlist with mpv using unbuffer to maintain terminal connection
# and process substitution to capture output without breaking stdin
unbuffer -p mpv --shuffle --term-osd=auto --osd-level=2 --no-audio-display \
--playlist="$playlist" 2>&1 > >(grep -E "Playing") < /dev/tty

explanation console stdin, stdout, redirection

2025-09-27T03:37:09+00:00

#!/bin/bash
# ┏━┓╻ ┏━┓╻ ╻┏┓╻╻ ╻┏┳┓┏━┓╻ ╻ USAGE: playnumpv
# ┣━┛┃ ┣━┫┗┳┛┃┗┫┃ ┃┃┃┃┣━┛┃┏┛ (where days = number of days to
# ╹ ┗━╸╹ ╹ ╹ ╹ ╹┗━┛╹ ╹╹ ┗┛ search back for newer media files)

# Check if argument is provided
if [ -z "$1" ] || [[ ! "$1" =~ ^[0-9]+$ ]]; then
echo "Usage: $0 "
exit 1
fi

# Create a temporary playlist file in a safe location
playlist=$(mktemp) || { echo "Failed to create temporary file"; exit 1; }

# Set trap to clean up temporary file on exit
trap 'rm -f "$playlist"' EXIT

# Get absolute path of the playlist to exclude it from search
abs_playlist=$(realpath "$playlist")

# Find all media files modified in the last $1 days and add them to the playlist
# Using absolute paths to avoid issues with relative paths
find "$PWD" -type f -regextype posix-extended -regex '.*\.(mp3|flac|opus|ogg|m4a|wav|nsf|mod|xm)' \
-mtime -"${1}" ! -path "$abs_playlist" -print0 | \
sort -z | \
tr '\0' '\n' > "$playlist"

# Check if any files were found
if [ ! -s "$playlist" ]; then
echo "No files found newer than ${1} days."
exit 0
fi

# Count the number of files in the playlist
file_count=$(wc -l < "$playlist")
echo "Found $file_count files to play."

# Play the playlist with mpv, using unbuffer to maintain terminal connection
# and process substitution to capture output without breaking stdin
unbuffer -p mpv --shuffle --term-osd=auto --osd-level=2 --no-audio-display \
--playlist="$playlist" 2>&1 > >(grep -E "Playing") < /dev/tty

# Multi-line comment explaining the redirection technique:
: <<'EOF'
EXPLANATION OF THE REDIRECTION TECHNIQUE:

The command uses several advanced shell features to maintain keyboard control while filtering output:

1. `unbuffer -p`:
- Creates a pseudo-terminal for mpv
- Ensures mpv maintains interactive behavior including keyboard input handling

2. `2>&1`:
- Redirects stderr to stdout
- Combines both output streams

3. `> >(grep -E "Playing")`:
- Uses process substitution (the `>(...)` syntax)
- Creates a temporary file descriptor connected to grep
- Sends mpv's output to grep without breaking terminal connection
- Unlike a regular pipe, this doesn't disrupt keyboard input

4. `< /dev/tty`:
- Explicitly redirects stdin to the terminal device
- Ensures mpv gets keyboard input directly from the terminal
- This is critical for maintaining keyboard control

WHY THIS WORKS WHEN REGULAR PIPES FAIL:

Regular pipes (mpv | grep) break keyboard input because:
- The shell puts commands in separate process groups
- mpv detects its output is going to a pipe and may change behavior
- Terminal control gets disrupted

Our solution works because:
- unbuffer maintains the terminal connection
- Process substitution doesn't break the terminal connection like a pipe
- Explicit terminal input redirection ensures keyboard control
- The combination preserves mpv's interactive capabilities

DATA FLOW:
Keyboard Input → /dev/tty → mpv (via unbuffer) → Process Substitution → grep → Terminal
EOF