修复问题4

public/js/main.js

@@ -93,6 +93,7 @@ document.addEventListener('DOMContentLoaded', () => {
     let controlsPointerReleaseTimeout = null;
     let managedSubtitleTracks = [];
     let selectedSubtitleTrackId = 'off';
+    let pendingAutoPlayAfterDownload = false;
 
     if (videoPlayer) {
         videoPlayer.controls = false;
@@ -215,6 +216,29 @@ document.addEventListener('DOMContentLoaded', () => {
         controlSubtitleToggle.textContent = selectedOption ? selectedOption.textContent : 'CC Off';
     };
 
+    const maybeStartPlaybackAfterDownload = () => {
+        if (!pendingAutoPlayAfterDownload || !hasDownloadCompleted) return;
+        if (!videoPlayer || videoPlayer.readyState < 2) return;
+
+        pendingAutoPlayAfterDownload = false;
+        syncVideoDurationFromPlayer();
+        transcodingOverlay.classList.add('hidden');
+        videoPlayer.classList.remove('hidden');
+        isStreamActive = true;
+        lastAbsolutePlaybackTime = seekOffset;
+        showSeekBar();
+        showCustomControls();
+        updateSeekBarPosition(seekOffset);
+        updatePlayControls();
+        updateVolumeControls();
+        updateFullscreenControls();
+        schedulePlaybackChromeHide();
+        videoPlayer.play().catch(() => {});
+        loadSubtitleTracks(seekOffset).catch((error) => {
+            console.error('Subtitle load failed:', error);
+        });
+    };
+
     const resetSubtitleTracks = () => {
         managedSubtitleTracks.forEach((track) => track.element.remove());
         managedSubtitleTracks = [];
@@ -468,6 +492,7 @@ document.addEventListener('DOMContentLoaded', () => {
             }, 600);
         } else if (status === 'transcoding') {
             hasDownloadCompleted = true;
+            maybeStartPlaybackAfterDownload();
             if (!isStreamActive) {
                 if (transcodingOverlay) transcodingOverlay.classList.remove('hidden');
                 if (videoPlayer) videoPlayer.classList.add('hidden');
@@ -487,6 +512,7 @@ document.addEventListener('DOMContentLoaded', () => {
             }
         } else if (status === 'finished') {
             hasDownloadCompleted = true;
+            maybeStartPlaybackAfterDownload();
             if (!isStreamActive) {
                 if (transcodingOverlay) transcodingOverlay.classList.remove('hidden');
                 showTranscodePhase();
@@ -520,6 +546,7 @@ document.addEventListener('DOMContentLoaded', () => {
 
     const resetPhases = () => {
         hasDownloadCompleted = false;
+        pendingAutoPlayAfterDownload = false;
         if (downloadPhase) downloadPhase.classList.remove('hidden');
         if (downloadSizeText) downloadSizeText.textContent = '准备下载...';
         if (downloadProgressText) downloadProgressText.textContent = '0%';
@@ -573,6 +600,8 @@ document.addEventListener('DOMContentLoaded', () => {
     });
     videoPlayer.addEventListener('loadedmetadata', syncVideoDurationFromPlayer);
     videoPlayer.addEventListener('durationchange', syncVideoDurationFromPlayer);
+    videoPlayer.addEventListener('loadeddata', maybeStartPlaybackAfterDownload);
+    videoPlayer.addEventListener('canplay', maybeStartPlaybackAfterDownload);
 
     videoPlayer.addEventListener('play', () => {
         updatePlayControls();
@@ -1251,6 +1280,7 @@ document.addEventListener('DOMContentLoaded', () => {
         seekOffset = 0;
         videoDuration = 0;
         isStreamActive = false;
+        pendingAutoPlayAfterDownload = true;
         hideSeekBar();
         hideCustomControls();
         setPlaybackStatus('Paused', 'paused');
@@ -1261,27 +1291,7 @@ document.addEventListener('DOMContentLoaded', () => {
             const streamUrl = buildStreamUrl();
             videoPlayer.src = streamUrl;
             videoPlayer.load();
-            const onCanPlayAfterDownload = () => {
-                if (!hasDownloadCompleted) return;
-                videoPlayer.removeEventListener('canplay', onCanPlayAfterDownload);
-                syncVideoDurationFromPlayer();
-                transcodingOverlay.classList.add('hidden');
-                videoPlayer.classList.remove('hidden');
-                isStreamActive = true;
-                lastAbsolutePlaybackTime = seekOffset;
-                showSeekBar();
-                showCustomControls();
-                updateSeekBarPosition(seekOffset);
-                updatePlayControls();
-                updateVolumeControls();
-                updateFullscreenControls();
-                schedulePlaybackChromeHide();
-                videoPlayer.play().catch(() => {});
-                loadSubtitleTracks(seekOffset).catch((error) => {
-                    console.error('Subtitle load failed:', error);
-                });
-            };
-            videoPlayer.addEventListener('canplay', onCanPlayAfterDownload);
+            maybeStartPlaybackAfterDownload();
         } catch (err) {
             console.error(err);
             transcodingOverlay.innerHTML = `<p style="color: #ef4444;">Transcode Failed: ${err.message}</p>`;
@@ -1304,6 +1314,7 @@ document.addEventListener('DOMContentLoaded', () => {
 
             handleProgress({ status: 'cancelled', percent: 0, details: 'Transcode stopped' });
             isStreamActive = false;
+            pendingAutoPlayAfterDownload = false;
             videoPlayer.pause();
             videoPlayer.removeAttribute('src');
             videoPlayer.load();