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Added subtitles of info

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Jon
2026-04-29 22:14:38 +01:00
parent 4902f04491
commit 7ce94f78c4
1 changed files with 139 additions and 80 deletions
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219
dashcam.html
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@@ -12,7 +12,6 @@
#rec-indicator { position: absolute; top: 12px; left: 50%; transform: translateX(-50%); background: rgba(180,0,0,0.75); border-radius: 20px; padding: 4px 12px; color: #fff; font-size: 11px; letter-spacing: 1px; display: none; align-items: center; gap: 6px; white-space: nowrap; }
#rec-dot { width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: blink 1s infinite; }
#rec-timer { font-size: 11px; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }
#speed-display { position: absolute; top: 12px; right: 12px; text-align: center; background: rgba(0,0,0,0.45); border-radius: 12px; padding: 6px 14px; }
@@ -30,7 +29,6 @@
@keyframes gpsblink { 0%,100%{opacity:1} 50%{opacity:0.4} }
#status-bar { position: absolute; bottom: 90px; left: 12px; font-size: 10px; color: rgba(255,255,255,0.4); font-family: var(--font-sans); pointer-events: none; }
#placeholder { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #888; gap: 10px; font-family: var(--font-sans); background: #000; }
#btn-bar { position: absolute; bottom: 0; left: 0; right: 0; display: flex; justify-content: center; align-items: center; gap: 10px; padding: 7px 12px; background: rgba(0,0,0,0.5); pointer-events: all; flex-wrap: wrap; }
@@ -45,31 +43,26 @@
<div id="app">
<video id="video" autoplay playsinline muted></video>
<div id="placeholder">
<div style="font-size:40px">&#127909;</div>
<div style="color:#aaa;font-family:var(--font-sans)">Tap START to begin</div>
<div style="font-size:11px;color:#555;font-family:var(--font-sans)">Camera + location permissions required</div>
</div>
<div id="hud">
<div id="top-left">
<div id="clock">--:--:--</div>
<div id="dateline">---</div>
</div>
<div id="rec-indicator">
<div id="rec-dot"></div>
<span>REC</span>
<span id="rec-timer">00:00</span>
</div>
<div id="speed-display">
<div id="speed-val">--</div>
<div id="speed-unit">MPH</div>
<div id="max-speed">MAX --</div>
</div>
<div id="gps-bar">
<div class="data-row">
<div id="gps-dot"></div>
@@ -81,9 +74,7 @@
<div class="di"><span class="dl">DIST</span><span class="dv" id="dist-val">0.00km</span></div>
</div>
</div>
<div id="status-bar"></div>
<div id="btn-bar">
<button class="hud-btn primary" id="start-btn" onclick="startDashcam()">START</button>
<button class="hud-btn" id="flip-btn" onclick="switchCamera()" disabled>FLIP</button>
@@ -99,10 +90,17 @@ let stream = null, facingMode = 'environment';
let watchId = null, clockInterval = null;
let useMph = true, maxSpeed = 0;
let lastPos = null, totalDist = 0;
let mediaRecorder = null, recordedChunks = [], recInterval = null, recSeconds = 0;
let isRecording = false;
let mediaRecorder = null, recordedChunks = [];
let recInterval = null, recSeconds = 0, isRecording = false;
// SRT state
let srtEntries = [];
let srtInterval = null;
let recStartTime = null;
let currentGPS = { lat: null, lng: null, alt: null, acc: null, hdg: null, speed: 0 };
function cvt(ms) { return useMph ? ms * 2.23694 : ms * 3.6; }
function cvtLabel() { return useMph ? 'mph' : 'kph'; }
function haversine(a, b) {
const R = 6371000, r = Math.PI / 180;
@@ -116,7 +114,8 @@ function bearingLabel(deg) {
return ['N','NE','E','SE','S','SW','W','NW'][Math.round(deg/45)%8] + ' ' + Math.round(deg) + '\xb0';
}
function pad(v) { return String(v).padStart(2,'0'); }
function pad(v, n=2) { return String(Math.floor(v)).padStart(n,'0'); }
function pad3(v) { return String(Math.floor(v)).padStart(3,'0'); }
function updateClock() {
const n = new Date();
@@ -128,13 +127,138 @@ function updateClock() {
function setStatus(msg) { document.getElementById('status-bar').textContent = msg; }
// Format ms offset as SRT timecode HH:MM:SS,mmm
function toSRTTime(ms) {
const h = Math.floor(ms / 3600000);
const m = Math.floor((ms % 3600000) / 60000);
const s = Math.floor((ms % 60000) / 1000);
const mil = ms % 1000;
return pad(h)+':'+pad(m)+':'+pad(s)+','+pad3(mil);
}
// Capture one SRT frame every second during recording
function captureSRTFrame() {
const now = new Date();
const elapsed = Date.now() - recStartTime;
const dateStr = now.getFullYear()+'-'+pad(now.getMonth()+1)+'-'+pad(now.getDate());
const timeStr = pad(now.getHours())+':'+pad(now.getMinutes())+':'+pad(now.getSeconds());
const spd = currentGPS.speed !== null ? Math.round(cvt(currentGPS.speed)) : '--';
const lat = currentGPS.lat !== null ? currentGPS.lat.toFixed(6) : '--';
const lng = currentGPS.lng !== null ? currentGPS.lng.toFixed(6) : '--';
const alt = currentGPS.alt !== null ? Math.round(currentGPS.alt)+'m' : '--';
const acc = currentGPS.acc !== null ? Math.round(currentGPS.acc)+'m' : '--';
const hdg = currentGPS.hdg !== null ? bearingLabel(currentGPS.hdg) : '--';
srtEntries.push({
startMs: elapsed,
endMs: elapsed + 1000,
lines: [
dateStr + ' ' + timeStr,
'Speed: ' + spd + ' ' + cvtLabel() + ' Hdg: ' + hdg,
'Lat: ' + lat + ' Lng: ' + lng,
'Alt: ' + alt + ' Acc: ' + acc
]
});
}
function buildSRT() {
return srtEntries.map((e, i) => {
return (i+1) + '\n' +
toSRTTime(e.startMs) + ' --> ' + toSRTTime(e.endMs) + '\n' +
e.lines.join('\n');
}).join('\n\n') + '\n';
}
function saveSRT(basename) {
if (srtEntries.length === 0) return;
const blob = new Blob([buildSRT()], { type: 'text/plain' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = basename + '.srt';
a.click();
setTimeout(() => URL.revokeObjectURL(url), 5000);
}
function getBestMimeType() {
const types = ['video/webm;codecs=vp9','video/webm;codecs=vp8','video/webm','video/mp4'];
for (const t of types) { if (MediaRecorder.isTypeSupported(t)) return t; }
return '';
}
function getFilename() {
const n = new Date();
return 'dashcam_' + n.getFullYear() + pad(n.getMonth()+1) + pad(n.getDate()) + '_' + pad(n.getHours()) + pad(n.getMinutes()) + pad(n.getSeconds());
}
function saveVideo(basename) {
if (recordedChunks.length === 0) { setStatus('Nothing to save'); return; }
const mime = getBestMimeType();
const ext = mime.includes('mp4') ? 'mp4' : 'webm';
const blob = new Blob(recordedChunks, { type: mime });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = basename + '.' + ext;
a.click();
setTimeout(() => URL.revokeObjectURL(url), 5000);
recordedChunks = [];
}
function toggleRecord() {
if (!stream) return;
const btn = document.getElementById('rec-btn');
const ind = document.getElementById('rec-indicator');
if (!isRecording) {
recordedChunks = [];
srtEntries = [];
recStartTime = Date.now();
const mime = getBestMimeType();
try {
mediaRecorder = new MediaRecorder(stream, mime ? { mimeType: mime } : {});
} catch(e) {
mediaRecorder = new MediaRecorder(stream);
}
mediaRecorder.ondataavailable = e => { if (e.data && e.data.size > 0) recordedChunks.push(e.data); };
mediaRecorder.onstop = () => {
const name = getFilename();
saveVideo(name);
setTimeout(() => saveSRT(name), 800);
setStatus('Saved video + SRT');
};
mediaRecorder.start(1000);
isRecording = true;
recSeconds = 0;
ind.style.display = 'flex';
btn.innerHTML = '&#9646;&#9646; SAVE';
btn.classList.add('danger');
captureSRTFrame();
recInterval = setInterval(() => {
recSeconds++;
const m = pad(Math.floor(recSeconds/60)), s = pad(recSeconds%60);
document.getElementById('rec-timer').textContent = m+':'+s;
captureSRTFrame();
}, 1000);
setStatus('Recording...');
} else {
mediaRecorder.stop();
isRecording = false;
clearInterval(recInterval);
ind.style.display = 'none';
btn.innerHTML = '&#9679; RECORD';
btn.classList.remove('danger');
setStatus('Saving...');
}
}
function startGPS() {
if (!navigator.geolocation) { setStatus('GPS unavailable'); return; }
document.getElementById('gps-bar').style.display = 'flex';
watchId = navigator.geolocation.watchPosition(pos => {
const c = pos.coords;
const spd = c.speed !== null && c.speed >= 0 ? c.speed : 0;
const conv = cvt(spd);
currentGPS = { lat: c.latitude, lng: c.longitude, alt: c.altitude, acc: c.accuracy, hdg: c.heading, speed: c.speed !== null ? c.speed : 0 };
const conv = cvt(currentGPS.speed);
if (conv > maxSpeed) maxSpeed = conv;
const cur = { lat: c.latitude, lng: c.longitude };
if (lastPos) { const d = haversine(lastPos, cur); if (d < 200) totalDist += d; }
@@ -155,72 +279,6 @@ function startGPS() {
}, { enableHighAccuracy: true, maximumAge: 1000, timeout: 15000 });
}
function getBestMimeType() {
const types = [
'video/webm;codecs=vp9',
'video/webm;codecs=vp8',
'video/webm',
'video/mp4'
];
for (const t of types) { if (MediaRecorder.isTypeSupported(t)) return t; }
return '';
}
function saveRecording() {
if (recordedChunks.length === 0) { setStatus('Nothing to save'); return; }
const mime = getBestMimeType();
const ext = mime.includes('mp4') ? 'mp4' : 'webm';
const blob = new Blob(recordedChunks, { type: mime });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
const now = new Date();
a.href = url;
a.download = 'dashcam_' + now.getFullYear() + pad(now.getMonth()+1) + pad(now.getDate()) + '_' + pad(now.getHours()) + pad(now.getMinutes()) + pad(now.getSeconds()) + '.' + ext;
a.click();
setTimeout(() => URL.revokeObjectURL(url), 5000);
recordedChunks = [];
setStatus('Saved!');
}
function toggleRecord() {
if (!stream) return;
const btn = document.getElementById('rec-btn');
const ind = document.getElementById('rec-indicator');
if (!isRecording) {
recordedChunks = [];
const mime = getBestMimeType();
try {
mediaRecorder = new MediaRecorder(stream, mime ? { mimeType: mime } : {});
} catch(e) {
mediaRecorder = new MediaRecorder(stream);
}
mediaRecorder.ondataavailable = e => { if (e.data && e.data.size > 0) recordedChunks.push(e.data); };
mediaRecorder.onstop = saveRecording;
mediaRecorder.start(1000);
isRecording = true;
recSeconds = 0;
ind.style.display = 'flex';
btn.textContent = '&#9646;&#9646; SAVE';
btn.innerHTML = '&#9646;&#9646; SAVE';
btn.classList.add('danger');
recInterval = setInterval(() => {
recSeconds++;
const m = pad(Math.floor(recSeconds/60)), s = pad(recSeconds%60);
document.getElementById('rec-timer').textContent = m+':'+s;
}, 1000);
setStatus('Recording...');
} else {
mediaRecorder.stop();
isRecording = false;
clearInterval(recInterval);
ind.style.display = 'none';
btn.innerHTML = '&#9679; RECORD';
btn.classList.remove('danger');
setStatus('Saving...');
}
}
async function startDashcam() {
const btn = document.getElementById('start-btn');
btn.disabled = true; btn.textContent = '...';
@@ -238,6 +296,7 @@ async function startDashcam() {
btn.textContent = 'RESTART'; btn.disabled = false;
if (watchId !== null) { navigator.geolocation.clearWatch(watchId); watchId = null; }
maxSpeed = 0; totalDist = 0; lastPos = null;
currentGPS = { lat: null, lng: null, alt: null, acc: null, hdg: null, speed: 0 };
startGPS();
if (clockInterval) clearInterval(clockInterval);
clockInterval = setInterval(updateClock, 1000);