Work in progress. Most of concept fleshed out

This commit is contained in:
Matt McWilliams 2022-12-28 11:41:42 -05:00
parent 01e4803ac5
commit 7be5c09934
6 changed files with 162 additions and 6 deletions

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.gitignore vendored Normal file
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.env
videos
input
*.sqlite

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README.md Normal file
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# Bash TV
A simple RTMP streaming TV station in Bash.
### Dependencies
* Bash
* ffmpeg
* sqlite3
### Scripts
#### tv.sh
This script runs the TV station by looping over a collection of files in a directory and playing them randomly until they have all been played one time.
#### encode.sh
This script can be run on a cronjob to detect new video files and re-encode them for playback in the tv station.
#### .env
This configuration file contains the environment variables that are used by the other scripts to operate the streaming station.
#### common.sh
Script containing common helper functions and environment configuration scripts used between the `tv.sh` and `encode.sh` scripts.

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common.sh Normal file
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#!/bin/bash
if [ ! -f .env ]; then
cp default.env .env
fi
source .env
if [ ! -d "${INPUT}" ]; then
mkdir -p "${INPUT}"
fi
if [ ! -d "${VIDEOS}" ]; then
mkdir -p "${VIDEOS}"
fi
HISTORY_SETUP="CREATE TABLE IF NOT EXISTS history (
video VARCHAR PRIMARY KEY,
playcount INT DEFAULT 0,
last INT
)"
PLAYBACK_SETUP="CREATE TABLE IF NOT EXISTS playback (
video VARCHAR PRIMARY KEY
)"
SetupHistory () {
echo "${HISTORY_SETUP}" | sqlite3 "${HISTORY}"
}
SetupPlayback () {
echo "${PLAYBACK_SETUP}" | sqlite3 "${PLAYBACK}"
}
WipePlayback () {
rm -f "${PLAYBACK}"
}
PDB () {
sqlite3 "${PLAYBACK}" "${1}"
}
HDB () {
sqlite3 "${HISTORY}" "${1}"
}

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default.env Normal file
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WIDTH=720
HEIGHT=480
BUG=""
PLAYBACK="playback.sqlite"
HISTORY="history.sqlite"
VIDEOS="./videos"
INPUT="./input"
DESTINATION="rtmp://localhost/live"

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encode.sh Normal file
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#!/bin/bash
set -e
source ./common.sh
count=$(ls -1 "${INPUT}/" | wc -l)
if [ ${count} == 0 ]; then
echo "No files to process"
exit 1
fi
SCALE="scale=${WIDTH}:${HEIGHT}:force_original_aspect_ratio=decrease,pad=${WIDTH}:${HEIGHT}:(ow-iw)/2:(oh-ih)/2"
Encode () {
name=$(basename "${1}")
nameNoExt=${name%.*}
now=$(date '+%s')
output="${VIDEOS}/${nameNoExt}_${now}.flv"
if [ -f "${VIDEOS}/${nameNoExt}"*".flv" ]; then
echo "File ${name} already exists"
return
fi
echo "Encoding ${name}..."
ffmpeg -i "${1}" -c:v libx264 -tune zerolatency -pix_fmt yuv420p -vf "${SCALE}" \
-c:a aac -b:a 190k -ac 2 -ar 44100 \
-f flv "${output}"
}
fileList=$(mktemp)
ls -1 "${INPUT}/" > "${fileList}"
while read videoIn; do
Encode "${INPUT}/${videoIn}"
done < "${fileList}"
rm -f "${fileList}"

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tv.sh
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#!/bin/bash
WIDTH=720
HEIGHT=480
BUG=""
PLAYBACK="playback.sqlite"
HISTORY="history.sqlite"
set -e
source ./common.sh
# Steps : enumerate all files at beginning of every playback decision
# Compare to files in folder
@ -17,3 +15,36 @@ HISTORY="history.sqlite"
# add to history database
# start playback
#
Play () {
ffmpeg -threads 1 -re -i "${1}" -c copy -f flv "${DESTINATION}"
}
AllFiles () {
fileList=$(mktemp)
ls -1 "${VIDEOS}/"*.flv > "${fileList}"
echo "${fileList}"
}
SetupHistory
SetupPlayback
last=""
while true; do
files=$(AllFiles)
fileCount=$(cat "${files}" | wc -l)
playbackCount=$(PDB "SELECT COUNT(*) FROM playback")
echo $playbackCount
if [ ${fileCount} -eq 0 ]; then
echo "No files to play :("
break
fi
break
done
WipePlayback