chore: tighten up scheme support

Author: isekovanic

package/shared-native/android/StreamVideoThumbnailGenerator.kt

@@ -112,8 +112,11 @@ object StreamVideoThumbnailGenerator {
 
     when {
       scheme.isNullOrEmpty() -> retriever.setDataSource(url)
-      scheme == "http" || scheme == "https" -> retriever.setDataSource(url, emptyMap())
-      else -> retriever.setDataSource(context, uri)
+      scheme == "content" || scheme == "file" -> retriever.setDataSource(context, uri)
+      else ->
+        throw IllegalArgumentException(
+          "Unsupported video URI scheme for thumbnail generation: $scheme. Local assets only.",
+        )
     }
   }
 

package/shared-native/ios/StreamVideoThumbnailGenerator.swift

@@ -165,7 +165,7 @@ public final class StreamVideoThumbnailGenerator: NSObject {
       return resolvePhotoLibraryAsset(url: url)
     }
 
-    if let normalizedURL = normalizeURL(url) {
+    if let normalizedURL = normalizeLocalURL(url) {
       return AVURLAsset(url: normalizedURL)
     }
 
@@ -220,9 +220,13 @@ public final class StreamVideoThumbnailGenerator: NSObject {
       .trimmingCharacters(in: CharacterSet(charactersIn: "/")) ?? ""
   }
 
-  private static func normalizeURL(_ url: String) -> URL? {
-    if let parsedURL = URL(string: url), parsedURL.scheme != nil {
-      return parsedURL
+  private static func normalizeLocalURL(_ url: String) -> URL? {
+    if let parsedURL = URL(string: url), let scheme = parsedURL.scheme?.lowercased() {
+      if scheme == "file" {
+        return parsedURL
+      }
+
+      return nil
     }
 
     return URL(fileURLWithPath: url)