修复seedking bugs

server.js

@@ -106,6 +106,49 @@ const createFfmpegOptions = (encoderName) => {
     return options;
 };
 
+const parseFpsValue = (fpsText) => {
+    if (typeof fpsText !== 'string' || !fpsText.trim()) {
+        return 0;
+    }
+
+    if (fpsText.includes('/')) {
+        const [numeratorText, denominatorText] = fpsText.split('/');
+        const numerator = parseFloat(numeratorText);
+        const denominator = parseFloat(denominatorText);
+        if (Number.isFinite(numerator) && Number.isFinite(denominator) && denominator !== 0) {
+            return numerator / denominator;
+        }
+        return 0;
+    }
+
+    const numericValue = parseFloat(fpsText);
+    return Number.isFinite(numericValue) ? numericValue : 0;
+};
+
+const getSeekFriendlyOutputOptions = (encoderName, metadata) => {
+    const videoStream = (metadata?.streams || []).find((stream) => stream.codec_type === 'video') || {};
+    const parsedFps = parseFpsValue(videoStream.avg_frame_rate) || parseFpsValue(videoStream.r_frame_rate) || 24;
+    const normalizedFps = Math.min(Math.max(Math.round(parsedFps), 12), 60);
+    const gopSize = Math.max(24, normalizedFps * 2);
+    const options = [
+        '-movflags', 'frag_keyframe+empty_moov+default_base_moof+faststart',
+        '-frag_duration', '1000000',
+        '-min_frag_duration', '1000000',
+        '-g', gopSize.toString(),
+        '-keyint_min', gopSize.toString()
+    ];
+
+    if (encoderName === 'libx264' || encoderName === 'libx265') {
+        options.push('-sc_threshold', '0', '-force_key_frames', 'expr:gte(t,n_forced*2)');
+    } else if (/_nvenc$/.test(encoderName)) {
+        options.push('-forced-idr', '1', '-force_key_frames', 'expr:gte(t,n_forced*2)');
+    } else if (/_qsv$/.test(encoderName)) {
+        options.push('-idr_interval', '1');
+    }
+
+    return options;
+};
+
 const shouldRetryWithSoftware = (message) => {
     if (!message) return false;
     return /Cannot load libcuda\.so\.1|Could not open encoder before EOF|Error while opening encoder|Operation not permitted|Invalid argument/i.test(message);
@@ -430,8 +473,10 @@ app.get('/api/stream', async (req, res) => {
         }
 
         // Probe file for duration and broadcast to clients
+        let sourceMetadata = null;
         try {
             const metadata = await probeFile(tmpInputPath);
+            sourceMetadata = metadata;
             const duration = metadata.format?.duration || 0;
             progressMap[progressKey] = {
                 ...(progressMap[progressKey] || {}),
@@ -449,7 +494,7 @@ app.get('/api/stream', async (req, res) => {
         let ffmpegCommand = null;
 
         const startStream = (encoderName) => {
-            const streamingOptions = createFfmpegOptions(encoderName).concat(['-movflags', 'frag_keyframe+empty_moov+faststart']);
+            const streamingOptions = createFfmpegOptions(encoderName).concat(getSeekFriendlyOutputOptions(encoderName, sourceMetadata));
             ffmpegCommand = ffmpeg(tmpInputPath)
                 .videoCodec(encoderName)
                 .audioCodec('aac')