diff --git a/src/you_get/extractors/douyin.py b/src/you_get/extractors/douyin.py
index 213837e7..e39775f4 100644
--- a/src/you_get/extractors/douyin.py
+++ b/src/you_get/extractors/douyin.py
@@ -7,6 +7,7 @@ from ..common import (
     url_size,
     print_info,
     get_content,
+    fake_headers,
     download_urls,
     playlist_not_supported,
 )
@@ -16,13 +17,19 @@ __all__ = ['douyin_download_by_url']
 
 
 def douyin_download_by_url(url, **kwargs):
-    page_content = get_content(url)
+    page_content = get_content(url, headers=fake_headers)
     match_rule = re.compile(r'var data = \[(.*?)\];')
     video_info = json.loads(match_rule.findall(page_content)[0])
     video_url = video_info['video']['play_addr']['url_list'][0]
-    title = video_info['cha_list'][0]['cha_name']
+    # fix: https://www.douyin.com/share/video/6553248251821165832
+    # if there is no title, use desc
+    cha_list = video_info['cha_list']
+    if cha_list:
+        title = cha_list[0]['cha_name']
+    else:
+        title = video_info['desc']
     video_format = 'mp4'
-    size = url_size(video_url)
+    size = url_size(video_url, faker=True)
     print_info(
         site_info='douyin.com', title=title,
         type=video_format, size=size
@@ -30,6 +37,7 @@ def douyin_download_by_url(url, **kwargs):
     if not kwargs['info_only']:
         download_urls(
             urls=[video_url], title=title, ext=video_format, total_size=size,
+            faker=True,
             **kwargs
         )
 
diff --git a/src/you_get/extractors/qq.py b/src/you_get/extractors/qq.py
index 915f1b4b..15116b0c 100644
--- a/src/you_get/extractors/qq.py
+++ b/src/you_get/extractors/qq.py
@@ -18,11 +18,14 @@ def qq_download_by_vid(vid, title, output_dir='.', merge=True, info_only=False):
     host = video_json['vl']['vi'][0]['ul']['ui'][0]['url']
     streams = video_json['fl']['fi']
     seg_cnt = video_json['vl']['vi'][0]['cl']['fc']
+    filename = video_json['vl']['vi'][0]['fn']
     if seg_cnt == 0:
         seg_cnt = 1
+    else:
+        fn_pre, magic_str, video_type = filename.split('.')
 
     best_quality = streams[-1]['name']
-    part_format_id = streams[-1]['id']
+    #part_format_id = streams[-1]['id']
 
     part_urls= []
     total_size = 0
@@ -31,7 +34,17 @@ def qq_download_by_vid(vid, title, output_dir='.', merge=True, info_only=False):
         #    filename = fn_pre + '.mp4'
         #else:
         #    filename = fn_pre + '.p' + str(part_format_id % 10000) + '.' + str(part) + '.mp4'
-        filename = fn_pre + '.p' + str(part_format_id % 10000) + '.' + str(part) + '.mp4'
+        #filename = fn_pre + '.p' + str(part_format_id % 10000) + '.' + str(part) + '.mp4'
+
+        # fix some error cases("check vid&filename failed" and "format invalid")
+        # https://v.qq.com/x/page/q06058th9ll.html
+        # https://v.qq.com/x/page/t060789a21e.html
+        if seg_cnt == 1:
+            part_format_id = video_json['vl']['vi'][0]['cl']['keyid'].split('.')[-1]
+        else:
+            part_format_id = video_json['vl']['vi'][0]['cl']['ci'][part - 1]['keyid'].split('.')[1]
+            filename = '.'.join([fn_pre, magic_str, str(part), video_type])
+
         key_api = "http://vv.video.qq.com/getkey?otype=json&platform=11&format={}&vid={}&filename={}&appver=3.2.19.333".format(part_format_id, vid, filename)
         part_info = get_content(key_api)
         key_json = json.loads(match1(part_info, r'QZOutputJson=(.*)')[:-1])