diff --git a/app/src/main/kotlin/com/bodycamera/twentyfoulabs/data/ptt/PttAudioClient.kt b/app/src/main/kotlin/com/bodycamera/twentyfoulabs/data/ptt/PttAudioClient.kt
index dc16712..7a7cabf 100644
--- a/app/src/main/kotlin/com/bodycamera/twentyfoulabs/data/ptt/PttAudioClient.kt
+++ b/app/src/main/kotlin/com/bodycamera/twentyfoulabs/data/ptt/PttAudioClient.kt
@@ -858,22 +858,27 @@ class PttAudioClient @Inject constructor(
         suppliedUrl: String?,
         fallbackPath: String
     ): String {
-
         if (suppliedUrl.isNullOrBlank()) {
             return "$MEDIA_BASE_URL/$fallbackPath"
         }
 
-        return when {
-            suppliedUrl.startsWith(
-                "http://"
-            ) ||
-                suppliedUrl.startsWith(
-                    "https://"
-                ) -> suppliedUrl
+        // Rails (BROWSER_PROXY) envía "/media-mtx/ptt/u/:id/whip".
+        // MediaMTX espera "http://host:8889/ptt/u/:id/whip" (sin prefijo media-mtx).
+        val raw = suppliedUrl.trim()
 
-            else ->
-                "$MEDIA_BASE_URL/" +
-                    suppliedUrl.trimStart('/')
+        return when {
+            raw.startsWith("http://") || raw.startsWith("https://") -> {
+                if (raw.contains("/media-mtx/")) {
+                    "$MEDIA_BASE_URL/" + raw.substringAfter("/media-mtx/").trimStart('/')
+                } else {
+                    raw
+                }
+            }
+
+            else -> {
+                val path = raw.trimStart('/').removePrefix("media-mtx/")
+                "$MEDIA_BASE_URL/$path"
+            }
         }
     }