add better mime detection

lib/src/message_input.dart

@@ -5,6 +5,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_keyboard_visibility/flutter_keyboard_visibility.dart';
 import 'package:image_picker/image_picker.dart';
+import 'package:mime/mime.dart';
 import 'package:stream_chat/stream_chat.dart';
 import 'package:stream_chat_flutter/src/message_list_view.dart';
 import 'package:stream_chat_flutter/src/stream_chat_theme.dart';
@@ -634,14 +635,30 @@ class _MessageInputState extends State<MessageInput> {
       _attachments.add(attachment);
     });
 
-    final res = await channel.sendFile(
+    String url;
-      MultipartFile.fromBytes(
+    final filename = file.path.split('/').last;
-        bytes,
-        filename: file.path.split('/').last,
-      ),
-    );
 
-    attachment.url = res.file;
+    if (type == FileType.image) {
+      final res = await channel.sendImage(
+        MultipartFile.fromBytes(
+          bytes,
+          filename: filename,
+          contentType: MediaType.parse(lookupMimeType(filename)),
+        ),
+      );
+      url = res.file;
+    } else {
+      final res = await channel.sendFile(
+        MultipartFile.fromBytes(
+          bytes,
+          filename: filename,
+          contentType: MediaType.parse(lookupMimeType(filename)),
+        ),
+      );
+      url = res.file;
+    }
+
+    attachment.url = url;
 
     setState(() {
       attachment.uploaded = true;

lib/src/message_widget.dart

@@ -949,7 +949,9 @@ class _MessageWidgetState extends State<MessageWidget>
     }
 
     return FutureBuilder<void>(
-      future: videoController.initialize(),
+      future: videoController.value.initialized
+          ? Future.value(true)
+          : videoController.initialize(),
       builder: (_, snapshot) {
         if (snapshot.connectionState != ConnectionState.done) {
           return Container(

pubspec.yaml

@@ -20,6 +20,7 @@ dependencies:
   image_picker: ^0.6.4
   flutter_keyboard_visibility: ^0.8.0
   stream_chat: ^0.1.21
+  mime: ^0.9.6+3
   visibility_detector: ^0.1.4
 
 dev_dependencies: