diff --git a/modules/turnero/api/chat_upload_media.php b/modules/turnero/api/chat_upload_media.php
index dd53e82..890695d 100644
--- a/modules/turnero/api/chat_upload_media.php
+++ b/modules/turnero/api/chat_upload_media.php
@@ -28,9 +28,25 @@ $caption      = trim($_POST['caption'] ?? '');
 $isVoice      = !empty($_POST['is_voice']);
 
 // mime_content_type() returns video/webm for browser-recorded audio (same WebM container).
-// WhatsApp rejects webm; map to audio/ogg (same Opus codec, accepted format).
-$mime = (str_contains($detectedMime, 'webm') || str_contains($browserMime, 'webm'))
-    ? 'audio/ogg' : $detectedMime;
+// WhatsApp only accepts OGG Opus, not WebM. Convert with ffmpeg when available.
+$isWebm = str_contains($detectedMime, 'webm') || str_contains($browserMime, 'webm');
+$mime = $isWebm ? 'audio/ogg' : $detectedMime;
+
+$uploadFilePath = $file['tmp_name'];
+if ($isWebm && function_exists('shell_exec')) {
+    $ffmpeg = trim((string)@shell_exec('which ffmpeg 2>/dev/null'));
+    if ($ffmpeg) {
+        $convertedPath = sys_get_temp_dir() . '/wa_audio_' . uniqid() . '.ogg';
+        $cmd = escapeshellcmd($ffmpeg)
+            . ' -y -i ' . escapeshellarg($file['tmp_name'])
+            . ' -map 0:a:0 -c:a libopus -b:a 32k -vbr on -ar 48000 -ac 1 -f ogg '
+            . escapeshellarg($convertedPath) . ' 2>/dev/null';
+        @shell_exec($cmd);
+        if (file_exists($convertedPath) && filesize($convertedPath) > 0) {
+            $uploadFilePath = $convertedPath;
+        }
+    }
+}
 
 // Determinar tipo de media
 if (str_starts_with($mime, 'image/'))      $mediaType = 'image';
@@ -49,7 +65,7 @@ try {
     $wa = new WhatsAppService('turnero');
 
     // Subir a WhatsApp Media API
-    $uploadResult = $wa->uploadMedia($file['tmp_name'], $mime);
+    $uploadResult = $wa->uploadMedia($uploadFilePath, $mime);
     if (!$uploadResult || !isset($uploadResult['id'])) {
         tmErr('No se pudo subir el archivo a WhatsApp', 502);
     }