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';
@@ -636,13 +637,14 @@ class _MessageInputState extends State<MessageInput> {
     });
 
     String url;
+    final filename = file.path.split('/').last;
 
     if (type == FileType.image) {
       final res = await channel.sendImage(
         MultipartFile.fromBytes(
           bytes,
-          filename: file.path.split('/').last,
+          filename: filename,
-          contentType: MediaType.parse('image/jpeg'),
+          contentType: MediaType.parse(lookupMimeType(filename)),
         ),
       );
       url = res.file;
@@ -650,7 +652,8 @@ class _MessageInputState extends State<MessageInput> {
       final res = await channel.sendFile(
         MultipartFile.fromBytes(
           bytes,
-          filename: file.path.split('/').last,
+          filename: filename,
+          contentType: MediaType.parse(lookupMimeType(filename)),
         ),
       );
       url = res.file;

lib/src/message_widget.dart

@@ -1035,7 +1035,9 @@ 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

@@ -21,6 +21,7 @@ dependencies:
   image_picker: ^0.6.4
   flutter_keyboard_visibility: ^0.8.0
   stream_chat: ^0.2.0-alpha
+  mime: ^0.9.6+3
   visibility_detector: ^0.1.4
 
 dev_dependencies: