Python 2.7 如何使用python获取youtube的流媒体信息

我需要在youtube链接中获取一些数据，并将其放入日志文件中。 例如，当我在流媒体时重新加载youtube的网页时。我想知道视频将重新加载多少秒（在我的术语中是启动延迟）。第二个是以秒为单位的缓冲时间，第三个是缓冲计数

我试过这个密码

os.system("youtube-dl samplelink.com >> log.txt")

它返回如下数据：

[youtube] Tjnq5StX68g: Downloading webpage
[youtube] Tjnq5StX68g: Downloading video info webpage
[youtube] Tjnq5StX68g: Extracting video information
[youtube] Tjnq5StX68g: Downloading MPD manifest
[download] Destination: /youtubeDL/.f134

[download]   0.0% of 5.30MiB at 29.12KiB/s ETA 03:06
[download]   0.1% of 5.30MiB at 84.97KiB/s ETA 01:03
[download]   0.1% of 5.30MiB at 194.16KiB/s ETA 00:27
[download]   0.3% of 5.30MiB at 407.48KiB/s ETA 00:13
[download]   0.6% of 5.30MiB at 283.76KiB/s ETA 00:19
[download]   1.2% of 5.30MiB at 291.57KiB/s ETA 00:18
[download]   2.3% of 5.30MiB at 314.81KiB/s ETA 00:16
[download]   4.7% of 5.30MiB at 304.90KiB/s ETA 00:16
[download]   9.4% of 5.30MiB at 303.54KiB/s ETA 00:16
[download]  15.0% of 5.30MiB at 312.94KiB/s ETA 00:14
[download]  21.1% of 5.30MiB at 319.35KiB/s ETA 00:13
[download]  27.3% of 5.30MiB at 324.89KiB/s ETA 00:12
[download]  33.6% of 5.30MiB at 331.58KiB/s ETA 00:10
[download]  40.3% of 5.30MiB at 335.11KiB/s ETA 00:09
[download]  46.9% of 5.30MiB at 331.14KiB/s ETA 00:08
[download]  52.6% of 5.30MiB at 323.64KiB/s ETA 00:07
[download]  57.6% of 5.30MiB at 317.95KiB/s ETA 00:07
[download]  62.5% of 5.30MiB at 303.29KiB/s ETA 00:06
[download]  66.2% of 5.30MiB at 297.34KiB/s ETA 00:06
[download]  70.3% of 5.30MiB at 289.84KiB/s ETA 00:05
[download]  74.1% of 5.30MiB at 283.57KiB/s ETA 00:04
[download]  77.8% of 5.30MiB at 279.24KiB/s ETA 00:04
[download]  81.8% of 5.30MiB at 278.76KiB/s ETA 00:03
[download]  86.7% of 5.30MiB at 280.26KiB/s ETA 00:02
[download]  92.4% of 5.30MiB at 282.84KiB/s ETA 00:01
[download]  98.5% of 5.30MiB at 285.65KiB/s ETA 00:00
[download] 100.0% of 5.30MiB at 286.26KiB/s ETA 00:00
[download] 100% of 5.30MiB in 00:18
[download] Destination: /youtubeDL/.f251

[download]   0.0% of 2.99MiB at 34.13KiB/s ETA 01:30
[download]   0.1% of 2.99MiB at 99.64KiB/s ETA 00:30
[download]   0.2% of 2.99MiB at 225.91KiB/s ETA 00:13
[download]   0.5% of 2.99MiB at 473.01KiB/s ETA 00:06
[download]   1.0% of 2.99MiB at 379.24KiB/s ETA 00:08
[download]   2.1% of 2.99MiB at 341.24KiB/s ETA 00:08
[download]   4.1% of 2.99MiB at 312.79KiB/s ETA 00:09
[download]   8.3% of 2.99MiB at 265.26KiB/s ETA 00:10
[download]  15.8% of 2.99MiB at 243.19KiB/s ETA 00:10
[download]  23.1% of 2.99MiB at 237.15KiB/s ETA 00:09
[download]  30.4% of 2.99MiB at 233.35KiB/s ETA 00:09
[download]  37.7% of 2.99MiB at 227.94KiB/s ETA 00:08
[download]  44.4% of 2.99MiB at 224.52KiB/s ETA 00:07
[download]  51.2% of 2.99MiB at 226.00KiB/s ETA 00:06
[download]  58.9% of 2.99MiB at 228.15KiB/s ETA 00:05
[download]  66.8% of 2.99MiB at 224.88KiB/s ETA 00:04
[download]  73.5% of 2.99MiB at 224.39KiB/s ETA 00:03
[download]  80.6% of 2.99MiB at 221.15KiB/s ETA 00:02
[download]  86.9% of 2.99MiB at 222.09KiB/s ETA 00:01
[download]  94.6% of 2.99MiB at 224.02KiB/s ETA 00:00
[download] 100.0% of 2.99MiB at 226.88KiB/s ETA 00:00
[download] 100% of 2.99MiB in 00:13
[ffmpeg] Merging formats into "/youtubeDL/.mkv"