Capturing the live video stream from Studio Brussel

[Undertow]

I'm a confirmed newbie, please be gentle. Is it possible to capture the live video stream from Studio Brussel? I've tried some methods but I'm not having any success.

https://stubru.be/live

I'm very keen to learn the mechanics rather than just getting the quick fix, as it were. Not necessarily a step by step guide as to how its done, but just a hint of the software used etc.

Thank you for your help, folks.

[jagabo]

Get the m3u8 link from a web browser's Developer Tools (F12).

https://live-w.lwc.vrtcdn.be/groupb/live/0f394a26-c87d-475e-8590-e9c6e79b28d9/live.isml/.m3u8

Use youtube-dl to get a list of available streams:

youtube-dl -F https://live-w.lwc.vrtcdn.be/groupb/live/0f394a26-c87d-475e-8590-e9c6e79b28d9/live.isml/.m3u8

You'll see a list of streams:

format code            extension  resolution note
audio-aacl-96-English  mp4        audio only [en]
251                    mp4        416x234     251k , avc1.42C01E, 25.0fps, video only
484                    mp4        480x270     484k , avc1.42C01E, 25.0fps, video only
871                    mp4        640x360     871k , avc1.42C01E, 25.0fps, video only
1263                   mp4        768x432    1263k , avc1.42C01F, 25.0fps, video only
2217                   mp4        960x540    2217k , avc1.4D401F, 25.0fps, video only (best)

Pick the stream you want and download:

youtube-dl -f audio-aacl-96-English -o output.aac https://live-w.lwc.vrtcdn.be/groupb/live/0f394a26-c87d-475e-8590-e9c6e79b28d9/live.isml/.m3u8

Normally, youtube-dl will download the complete file. But since this is a live stream, it never ends. You have to hit CTRL+C to terminate the download. That leaves ".part" at the end of the filename. You have to remove that manually.

But there's a problem if you want both audio and video. When video and audio are in separate streams youtube-dl downloads all the video, then all the audio, and finally muxes them together into a single file. But a live stream never ends -- so it can't download all the video. And even if the video stream ends the program can't go back and get the audio that corresponds to the time the video was downloaded. You would have to start two instances of youtube-dl, one for the audio and one for the video. Then mux the resulting streams together when you're done.

[Undertow]

Wow! Thank you so much for taking the time to break it down for me too. I'm slowly learning, but I am learning. Much appreciated jagabo.

[jimdagys]

You would have to start two instances of youtube-dl, one for the audio and one for the video.

I assume you mean two command-line windows with youtube-dl. But it would be nearly impossible to hit enter and start both instances of youtube-dl at the exact same time, so it seems to me that the audio will be out of sync from the video by a few seconds. How would you delay/advance the audio to be in sync with the video?

[aazerty]

Hi ,

For both audio+video try :

youtube-dl -f audio-aacl-96-English+1263 ...

Cheers .

[jagabo]

For both audio+video try :

youtube-dl -f audio-aacl-96-English+1263 ...

That doesn't work for live streams because youtube-dl will try to download all the video in one pass, then all the audio in a second. Since a live stream never ends, youtube-dl will record video forever. And even if the video does end youtube-dl can't go back in time to get the audio.

You would have to start two instances of youtube-dl, one for the audio and one for the video.

I assume you mean two command-line windows with youtube-dl. But it would be nearly impossible to hit enter and start both instances of youtube-dl at the exact same time, so it seems to me that the audio will be out of sync from the video by a few seconds. How would you delay/advance the audio to be in sync with the video?

You can specify an audio delay/advance in the mux.

ffmpeg can download both video and audio streams simultaneously:

ffmpeg.exe -i "https://live-w.lwc.vrtcdn.be/groupb/live/0f394a26-c87d-475e-8590-e9c6e79b28d9/live.isml/.m3u8" -c copy output.mkv

[aazerty]

Hi jagabo ,

Thanks for the reply .

Cheers .