diff --git a/classes/MediaService.php b/classes/MediaService.php
index 0f4e809..855686a 100644
--- a/classes/MediaService.php
+++ b/classes/MediaService.php
@@ -215,14 +215,20 @@ class MediaService {
      * Fallback: descargar con wget via exec/proc_open (solo funciona en CLI)
      */
     private function shellDownload($url, $headers = []) {
-        // Verificar si exec está disponible
-        if (!function_exists('exec') || in_array('exec', array_map('trim', explode(',', ini_get('disable_functions'))))) {
-            // Intentar proc_open como alternativa
-            if (function_exists('proc_open')) {
-                return $this->procOpenDownload($url, $headers);
+        // Verificar si exec está realmente disponible
+        // php_admin_value[disable_functions] NO aparece en ini_get('disable_functions')
+        // así que hacemos un test real con try/catch
+        $execAvailable = function_exists('exec');
+        if ($execAvailable) {
+            try {
+                @exec('echo 1', $testOut, $testRc);
+            } catch (\Error $e) {
+                $execAvailable = false;
             }
-            error_log("[MediaService::shellDownload] Neither exec nor proc_open available");
-            return false;
+        }
+
+        if (!$execAvailable) {
+            return $this->procOpenDownload($url, $headers);
         }
 
         $tmpFile = tempnam(sys_get_temp_dir(), 'wget_');
@@ -231,7 +237,13 @@ class MediaService {
             $headerArgs .= ' --header=' . escapeshellarg($h);
         }
         $cmd = 'wget -q --prefer-family=IPv4 -O ' . escapeshellarg($tmpFile) . $headerArgs . ' ' . escapeshellarg($url) . ' 2>&1';
-        exec($cmd, $output, $exitCode);
+        try {
+            exec($cmd, $output, $exitCode);
+        } catch (\Error $e) {
+            error_log("[MediaService::shellDownload] exec() threw Error: " . $e->getMessage());
+            if (file_exists($tmpFile)) unlink($tmpFile);
+            return $this->procOpenDownload($url, $headers);
+        }
 
         if ($exitCode === 0 && file_exists($tmpFile) && filesize($tmpFile) > 0) {
             $content = file_get_contents($tmpFile);
@@ -249,6 +261,26 @@ class MediaService {
      * Descargar con proc_open (alternativa a exec)
      */
     private function procOpenDownload($url, $headers = []) {
+        // Test real de disponibilidad: php_admin_value no se refleja en ini_get
+        $procAvailable = function_exists('proc_open');
+        if ($procAvailable) {
+            try {
+                $testProc = @proc_open('echo 1', [1 => ['pipe', 'w']], $testPipes);
+                if (is_resource($testProc)) {
+                    fclose($testPipes[1]);
+                    proc_close($testProc);
+                } else {
+                    $procAvailable = false;
+                }
+            } catch (\Error $e) {
+                $procAvailable = false;
+            }
+        }
+        if (!$procAvailable) {
+            error_log("[MediaService::procOpenDownload] proc_open not available, skipping");
+            return false;
+        }
+
         $tmpFile = tempnam(sys_get_temp_dir(), 'wget_');
         $headerArgs = '';
         foreach ($headers as $h) {
@@ -256,7 +288,13 @@ class MediaService {
         }
         $cmd = 'wget -q --prefer-family=IPv4 -O ' . escapeshellarg($tmpFile) . $headerArgs . ' ' . escapeshellarg($url);
         
-        $proc = proc_open($cmd, [1 => ['pipe', 'w'], 2 => ['pipe', 'w']], $pipes);
+        try {
+            $proc = proc_open($cmd, [1 => ['pipe', 'w'], 2 => ['pipe', 'w']], $pipes);
+        } catch (\Error $e) {
+            error_log("[MediaService::procOpenDownload] proc_open() threw Error: " . $e->getMessage());
+            if (file_exists($tmpFile)) unlink($tmpFile);
+            return false;
+        }
         if (!is_resource($proc)) {
             error_log("[MediaService::procOpenDownload] proc_open failed");
             if (file_exists($tmpFile)) unlink($tmpFile);