How to download a certain time cut from a live stream?

[BosseB]

I am trying to create a PVR for recording from a 24/7 live stream at specified start times lasting for a specific time.
I have succeeded doing this for sites that stream into a video player in a webpage, but I have not found a working method for the SVT streams on SVT1 and SVT2

The URL lands on a page with a Play button which will start playing if clicked.

What I need is:
1) Some way to extract the playing URL which can be used with ffmpeg
2) The ffmpeg command to record the stream for a set time.

I have done this for the working sites:

"ffmpeg -hide_banner -referer \"${VIDEOURL}\" -i \"${VIDEOSTR}\" -vf scale=w=-4:h=480 -c:v libx264 -preset fast -crf 26 -c:a copy -t ${CAPTURETIME} ${TARGETFILE}"

Where:
VIDEOURL is the URL to the webpage containing the video player
VIDEOSTR is the m3u8 stream URL on that player
CAPTURETIME is the video duration to record
TARGETFILE is the output mp4 file

I use this command in at jobs on a Linux server to record the other streams.
So the start is given by the at command trigger time.

But the SVT site seems not to use m3u8 streams and has no embedded player either.

Any suggestions welcome!

[LZAA]

ffmpeg -hide_banner -i "https://svt1-d.akamaized.net/se/svt1/master-fmp4.m3u8?defaultSubLang=1" -c copy video.mp4
[hls @ 06ca3ec0] Skip ('#EXT-X-VERSION:5')
[hls @ 06ca3ec0] Skip ('#EXT-X-INDEPENDENT-SEGMENTS')
...
Input #0, hls, from 'https://svt1-d.akamaized.net/se/svt1/master-fmp4.m3u8?defaultSubLang=1':
Duration: N/A, start: 1401232.000000, bitrate: N/A
Program 0
Metadata:
variant_bitrate : 1870000
Stream #0:0(sv): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Svenska
Stream #0:1(sv-x-tal): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Uppl├дst undertext
Stream #0:2: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 960x540, 0 kb/s, 50 fps, 50 tbr, 90k tbn, 100 tbc (default)
Metadata:
variant_bitrate : 1870000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashavc1cmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Video
Program 1
Metadata:
variant_bitrate : 536000
Stream #0:0(sv): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Svenska
Stream #0:1(sv-x-tal): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Uppl├дst undertext
Stream #0:3: Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 416x234, 50 fps, 50 tbr, 90k tbn, 100 tbc (default)
Metadata:
variant_bitrate : 536000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashavc1cmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Video
Program 2
Metadata:
variant_bitrate : 1222000
Stream #0:0(sv): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Svenska
Stream #0:1(sv-x-tal): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Uppl├дst undertext
Stream #0:4: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x360, 0 kb/s, 50 fps, 50 tbr, 90k tbn, 100 tbc (default)
Metadata:
variant_bitrate : 1222000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashavc1cmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Video
Program 3
Metadata:
variant_bitrate : 3125000
Stream #0:0(sv): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Svenska
Stream #0:1(sv-x-tal): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Uppl├дst undertext
Stream #0:5: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720, 0 kb/s, 50 fps, 50 tbr, 90k tbn, 100 tbc (default)
Metadata:
variant_bitrate : 3125000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashavc1cmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Video
Program 4
Metadata:
variant_bitrate : 4720000
Stream #0:0(sv): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Svenska
Stream #0:1(sv-x-tal): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Uppl├дst undertext
Stream #0:6: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720, 0 kb/s, 50 fps, 50 tbr, 90k tbn, 100 tbc (default)
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashavc1cmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Video
Output #0, mp4, to 'video.mp4':
Metadata:
encoder : Lavf58.29.100
Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720, q=2-31, 0 kb/s, 50 fps, 50 tbr, 90k tbn, 90k tbc (default)
Metadata:
variant_bitrate : 3125000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashavc1cmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Video
Stream #0:1(sv): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
Metadata:
variant_bitrate : 4720000
major_brand : dash
minor_version : 1
compatible_brands: iso8mp41dashcmfc
creation_time : 2021-12-08T13:25:54.000000Z
comment : Svenska
Stream mapping:
Stream #0:5 -> #0:0 (copy)
Stream #0:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
[hls @ 06ca3ec0] No longer receiving playlist 2 ('https://svt1-d.akamaized.net/se/svt1/7adcdd89-f795-467b-a63a-27e8d35932ce/dash-v2/v2.m3u8')
[hls @ 06ca3ec0] No longer receiving playlist 4 ('https://svt1-d.akamaized.net/se/svt1/7adcdd89-f795-467b-a63a-27e8d35932ce/dash-v1/v1.m3u8')
[https @ 0775ad40] Opening 'https://svt1-d.akamaized.net/se/svt1/7adcdd89-f795-467b-a63a-27e8d35932ce/dash-v3/v3.m3u8' for reading
[hls @ 06ca3ec0] Skip ('#EXT-X-VERSION:6')
[https @ 08564b40] Opening 'https://svt1-d.akamaized.net/se/svt1/7adcdd89-f795-467b-a63a-27e8d35932ce/dash-v3/v3-init.mp4' for reading...

[BosseB]

Question:
How did you get to this:

https://svt1-d.akamaized.net/se/svt1/master-fmp4.m3u8?defaultSubLang=1

from this:

https://www.svtplay.se/kanaler/svt1?start=auto

If I use your URL above then I am able to download the stream (at least the test for 66 seconds was successful).
But I would like to know how you arrived at your URL from my URL so I can apply the method to other URL sources.

[therain]

try with api link in F12

[BosseB]

try with api link in F12

I cannot see that in my browser...
I am using Firefox on Windows 10, but the download and other operations are done on an Ubuntu Server 20.04.3 machine without any GUI installed. And it is automated such that it runs via at jobs 24/7...

I am using this command in a script to extract the m3u8 URL from a given website, but it does not work on SVTPlay:

CMD="curl -s \"${STREAMURL}\" | grep -o -e \"https://.\+m3u8\" | head -n 1"
M3U8=$(eval $CMD)

Here STREAMURL is the input, i.e. the URL to the webpage where the video plays.

I really need an alternate extractor for the m3u8 stream that works for SVT too.

[BosseB]

ffmpeg -hide_banner -i "https://svt1-d.akamaized.net/se/svt1/master-fmp4.m3u8?defaultSubLang=1" -c copy video.mp4

From this I have extracted the proposed URL as:

https://svt1-d.akamaized.net/se/svt1/master-fmp4.m3u8

And used it in my script, and it works OK.

I have also modified it to this for svt2:

https://svt2-d.akamaized.net/se/svt2/master-fmp4.m3u8

This too works.

But when I try to do the same for the other 3 channels it stops working, so these are non-working m3u8 URL:

https://svt24-d.akamaized.net/se/svt24/master-fmp4.m3u8
https://kunskapskanalen-d.akamaized.net/se/kunskapskanalen/master-fmp4.m3u8
https://svtbarn-d.akamaized.net/se/svtbarn/master-fmp4.m3u8

So I would really very much like to know HOW you arrived at the URL used in the ffmpeg command shown in your reply to my question...

[mister_ nex]

try with api link in F12

I cannot see that in my browser...
I am using Firefox on Windows 10

Firefox

[Attachment 62567 - Click to enlarge]

---------------

But when I try to do the same for the other 3 channels it stops working, so these are non-working m3u8 URL:

https://svt24-d.akamaized.net/se/svt24/master-fmp4.m3u8
https://kunskapskanalen-d.akamaized.net/se/kunskapskanalen/master-fmp4.m3u8
https://svtbarn-d.akamaized.net/se/svtbarn/master-fmp4.m3u8

Kunskapskanalen


[Attachment 62571 - Click to enlarge]

your code 
https://kunskapskanalen-d.akamaized.net/se/kunskapskanalen/master-fmp4.m3u8

code from sreenshot
https://svtk-d.akamaized.net/se/svtk/master-fmp4.m3u8?defaultSubLang=1

[BosseB]

I tried to use the browser again but was not able to bring on the screen display in the way you show.
But then I instead used the original URL from the first reply above by @LZAA and modified the identifiers until I got it to work.
It seems like these are the correct URL's to use:

# SVT1:  http://www.svtplay.se https://svt1-d.akamaized.net/se/svt1/master-fmp4.m3u8
# SVT2:  http://www.svtplay.se https://svt2-d.akamaized.net/se/svt2/master-fmp4.m3u8
# SVT24/Barnkanalen: http://www.svtplay.se https://svtb-d.akamaized.net/se/svtb/master-fmp4.m3u8
# Kunskapskanalen:   http://www.svtplay.se https://svtk-d.akamaized.net/se/svtk/master-fmp4.m3u8

SVT24 and Barnkanalen share the same stream URL so they are known as svtb but the broadcast times are non-overlapping....
I will let it be for now, but you never know when they change again and then I have to somehow grab them myself...

[BosseB]

Just an update for completeness:
I found a way to extract a usable URL for ffmpeg from the SVTPlay live stream URLs:

1) I installed svtplay-dl using these instructions for Debian-Ubuntu.
2) Then I used this type of command:

$ svtplay-dl --live --only-video -g https://www.svtplay.se/kanaler/svt1
https://svt1-d.akamaized.net/se/svt1/manifest.mpd?defaultSubLang=1

Notice that this gives the mpd reference rather than m3u8, but ffmpeg accepts it and downloads happily using this URL too.
I remove the last part before submitting to ffmpeg of course.