将 Azure Blob 存储中的视频流式传输到我的 PYQT5 python 应用程序

Question

我正在尝试播放存储在 PYQT5 应用程序的 Azure Blob 存储中的视频。我不想让它在本地下载。我做了很多搜索，发现你可以执行 download_blob().read() 或 readall() 或 readinto() ，这允许你将其读入内存，而无需下载实际文件。

我尝试使用 .read() .readall() 和 readinto() 但不完全确定我在做什么。我希望用户在选择视频后能够立即观看该视频。我尝试了 IOBytes 但没有成功。我还尝试使用 PYQT MediaContent 小部件并尝试 set_media()。

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QVBoxLayout, QWidget
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContent
from PyQt5.QtMultimediaWidgets import QVideoWidget
from PyQt5.QtCore import QBuffer, QUrl
from azure.storage.blob import BlobServiceClient

class VideoPlayerWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        # Initialize Azure Blob Storage client
        connection_string = "DefaultEndpointsProtocol=https;AccountNameN/GrGcA==;EndpointSuffix=core.windows.net"
        self.blob_service_client = BlobServiceClient.from_connection_string(connection_string)
        self.container_name = "testing"
        self.video_path = "video/short-test-92734b6d9f2e/out_0.mp4"

        self.setWindowTitle("Azure Video Player")
        self.setGeometry(100, 100, 800, 600)

        # Create layout
        layout = QVBoxLayout()

        # Create video widget
        self.video_widget = QVideoWidget()
        layout.addWidget(self.video_widget)

        # Create play button
        self.play_button = QPushButton("Play")
        self.play_button.clicked.connect(self.play_video)
        layout.addWidget(self.play_button)

        # Set layout
        central_widget = QWidget()
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)

        # Initialize video player
        self.media_player = QMediaPlayer(None, QMediaPlayer.VideoSurface)
        self.media_player.setVideoOutput(self.video_widget)

    def play_video(self):
        # Get video blob from Azure Blob Storage
        blob_client = self.blob_service_client.get_blob_client(container=self.container_name, blob=self.video_path)

        print("WAIT")
        # Download video content into memory
        # video_data = blob_client.download_blob().readall()
        print("WAIT")

        # Create a buffer from the video data
        # buffer = QBuffer(video_data)
        # buffer.open(QBuffer.ReadOnly)


        videoUrl = QUrl.fromLocalFile('azureBlobVolume/out_0.mp4')
        mediaContent = QMediaContent(videoUrl)
        self.media_player.setMedia(mediaContent)
        # Set media content to media player and play
        # self.media_player.setMedia(QMediaContent(), buffer)
        self.media_player.play()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = VideoPlayerWindow()
    window.show()
    sys.exit(app.exec_())

这是我正在使用的代码。正如您在上面看到的，我也尝试从缓冲区读取视频。

Answer 1

我正在尝试播放存储在 Azure Blob 存储中的视频 在我的 PYQT5 应用程序中。我不想让它在本地下载。

您可以使用下面的代码播放 Azure Blob 存储中的视频文件，而无需在 PYQT5 应用程序中将其本地下载。

代码：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QVBoxLayout, QWidget
from PyQt5.QtMultimedia import QMediaPlayer, QMediaContent
from PyQt5.QtMultimediaWidgets import QVideoWidget
from PyQt5.QtCore import QBuffer, QUrl

class VideoPlayerWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("Azure Video Player")
        self.setGeometry(100, 100, 800, 600)
        layout = QVBoxLayout()
        self.video_widget = QVideoWidget()
        layout.addWidget(self.video_widget)
        self.play_button = QPushButton("Play")
        self.play_button.clicked.connect(self.play_video)
        layout.addWidget(self.play_button)
        central_widget = QWidget()
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)
        self.media_player = QMediaPlayer(None, QMediaPlayer.VideoSurface)
        self.media_player.setVideoOutput(self.video_widget)

    def play_video(self):
    
        # Blob URL + ?SAS token (if your storage account container is private)
        blob_url ="https://venkat789.blob.core.windows.net/demo/sample-file-sd.mp4?sp=r&st=2024-02-21T06:56:05Z&se=2024-02-21T14:56:05Z&spr=https&sv=2022-11-02&sr=b&sig=FcQr%2B5jJssI8Ijxxxxxxxx"
        print("WAIT")
        print("WAIT")
        content = QMediaContent(QUrl.fromUserInput(blob_url))
        self.media_player.setMedia(content)
        self.media_player.play()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = VideoPlayerWindow()
    window.show()
    sys.exit(app.exec_())

上面的代码播放带有 SAS 令牌的 URL 中的视频。它使用 URL 创建一个 QMediaContent 对象并将其设置为媒体播放器。最后，它使用媒体播放器播放视频。

输出：