我有一个Qt应用程序,可以通过以下方式显示URL中的视频:
player = QMediaPlayer()
...
player.setMedia(QMediaContent(QUrl(video.url)))
...
但无法使用与urllib.request
相同的url下载视频,响应代码始终为200
,但Content-Length
为零
from urllib.request import urlopen, Request
rq = Request(video.url)
rp = urlopen(rq)
rp.headers["Content-Length"] # always 0
当im无法下载时,Qt如何显示视频
MWE
from PyQt5.QtWidgets import QApplication
from PyQt5.QtMultimediaWidgets import QVideoWidget
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContent
from PyQt5.QtCore import QUrl
from urllib.request import urlopen
import sys
class Test(QVideoWidget):
def __init__(self, *args, **kwargs):
QVideoWidget.__init__(self, *args, **kwargs)
self.player = QMediaPlayer()
self.player.setVideoOutput(self)
self.player.mediaStatusChanged.connect(self.statusChanged)
self.url = "https://api16-normal-c-useast1a.tiktokv.com/aweme/v1/play/?video_id=v09044190000brfkq160bkbi3ui1oko0&line=0&ratio=540p&media_type=4&vr_type=0&improve_bitrate=0&logo_name=tiktok_m&quality_type=11&source=PackSourceEnum_AWEME_DETAIL"
self.player.setMedia(QMediaContent(QUrl(self.url)))
def statusChanged(self, status):
if status == QMediaPlayer.LoadedMedia:
self.player.play()
elif status == QMediaPlayer.EndOfMedia:
self.player.play()
def download(self):
rp = urlopen(self.url)
if int(rp.headers["Content-Length"]) != 0:
with open("test.mp4", "wb") as mp4:
while True:
chunk = rp.read(1024)
if not chunk: break
mp4.write(chunk)
else:
raise Exception("Content-Length is Zero")
if __name__ == "__main__":
app = QApplication(sys.argv)
test = Test()
test.show()
# uncomment to download
# test.download()
sys.exit(app.exec_())
经过几次尝试,我发现您必须设置“用户代理”。Qt不直接处理QMediaPlayer请求,而是在Linux上处理像gstreamer这样的后端,这些后端设置了用户代理,使其正常工作
我还发现,你不应该成为像“Mozilla/5.0…”这样的浏览器的用户代理,这些浏览器可能会被拒绝作为一种保护手段
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