fix

app/Libs/Helpers.php

@@ -4550,21 +4550,35 @@ function upgrade480pTo720p($videoSource, $prefix = 'video', $isContent = false)
         $width = isset($matches[1]) ? (int)$matches[1] : 0;
         $height = isset($matches[2]) ? (int)$matches[2] : 0;
         
-        // 根据视频方向决定缩放参数
-        // 如果宽度 < 高度，说明是竖屏视频，短边是宽度
-        // 如果宽度 >= 高度，说明是横屏视频，短边是高度
+        // 根据视频方向决定缩放参数，确保短边达到720
+        // 计算缩放比例，使短边至少为720
         if ($width > 0 && $height > 0) {
+            $shortSide = min($width, $height);
+            $longSide = max($width, $height);
+            $targetShortSide = 720;
+            
+            // 计算缩放后的长边尺寸
+            $scale = $targetShortSide / $shortSide;
+            $targetLongSide = round($longSide * $scale);
+            
+            // 确保是偶数（视频编码要求）
+            if ($targetLongSide % 2 !== 0) {
+                $targetLongSide += 1;
+            }
+            
             if ($width < $height) {
-                // 竖屏：短边（宽）设为720
-                $scaleFilter = "scale=720:-2:flags=lanczos";
+                // 竖屏：宽度是短边
+                $scaleFilter = "scale={$targetShortSide}:{$targetLongSide}:flags=lanczos";
                 dLog('video_upgrade')->info('检测到竖屏视频，短边（宽）设为720', [
-                    'original_size' => "{$width}x{$height}"
+                    'original_size' => "{$width}x{$height}",
+                    'target_size' => "{$targetShortSide}x{$targetLongSide}"
                 ]);
             } else {
-                // 横屏：短边（高）设为720
-                $scaleFilter = "scale=-2:720:flags=lanczos";
+                // 横屏：高度是短边
+                $scaleFilter = "scale={$targetLongSide}:{$targetShortSide}:flags=lanczos";
                 dLog('video_upgrade')->info('检测到横屏视频，短边（高）设为720', [
-                    'original_size' => "{$width}x{$height}"
+                    'original_size' => "{$width}x{$height}",
+                    'target_size' => "{$targetLongSide}x{$targetShortSide}"
                 ]);
             }
         } else {