Lyrics & Knowledge Personal Pages Record Shop Auction Links Radio & Media Kids Membership Help
The Mudcat Cafeetta

Post to this Thread - Sort Ascending - Printer Friendly - Home


Tech: BBC Radio 3 Lossless stream

DaveRo 15 Jul 17 - 02:40 PM
Bonzo3legs 15 Jul 17 - 01:35 PM
DaveRo 15 Jul 17 - 01:14 PM
Bonzo3legs 15 Jul 17 - 12:30 PM
DaveRo 15 Jul 17 - 11:57 AM
Bonzo3legs 15 Jul 17 - 06:44 AM
GUEST 15 Jul 17 - 06:37 AM
Bonzo3legs 15 Jul 17 - 03:59 AM
Bonzo3legs 22 Apr 17 - 04:02 AM
DaveRo 21 Apr 17 - 02:21 PM
Bonzo3legs 21 Apr 17 - 01:29 PM
DaveRo 21 Apr 17 - 12:19 PM
DaveRo 21 Apr 17 - 05:20 AM
Bonzo3legs 21 Apr 17 - 04:50 AM
Thompson 21 Apr 17 - 04:42 AM
DaveRo 21 Apr 17 - 04:16 AM
Bonzo3legs 21 Apr 17 - 03:55 AM
DaveRo 21 Apr 17 - 03:32 AM
Bonzo3legs 20 Apr 17 - 05:06 PM
Bonzo3legs 17 Apr 17 - 06:47 AM
Share Thread
more
Lyrics & Knowledge Search [Advanced]
DT  Forum
Sort (Forum) by:relevance date
DT Lyrics:



Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 15 Jul 17 - 02:40 PM

I saw that, on Hydrogen Audio. That's much easier:)


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 15 Jul 17 - 01:35 PM

I just had latest "Nightly Build" of VLC (no install required) playing the Lossless FLAC stream, which it recorded simply by clicking the red record button.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 15 Jul 17 - 01:14 PM

It's interesting. I found a way of copying the stream.
There's a single 'header' file:
https://vs-dash-ww-rd-live.bbcfmt.hs.llnwd.net/al/lossless/A1/IS.mp4
and then a series of files which contain the sound:
https://vs-dash-ww-rd-live.bbcfmt.hs.llnwd.net/al/lossless/A1/390659324.m4s
https://vs-dash-ww-rd-live.bbcfmt.hs.llnwd.net/al/lossless/A1/390659325.m4s
https://vs-dash-ww-rd-live.bbcfmt.hs.llnwd.net/al/lossless/A1/390659326.m4s
which come into existence as they're broadcast, are around for a while (minutes?), and then vanish

If I concatenate all these I can copy the result with my dash-ified ffmpeg.
size=    2599kB time=00:00:22.94 bitrate= 928.0kbits/s speed=2.28e+03x
The result plays nicely. Each chunk is about three seconds long - that 22 seconds was 7 chunks.

This is all pretty straightforward - I imagine that ffmpeg already handles streams like this so it should be fixable. But not by me!

What I might try is a Firefox addon that captures and copies the chunks as they arrive. I think Rule Britannia will be a distant memory by the time I manage that though!


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 15 Jul 17 - 12:30 PM

Thank Dave, I'll keep a lookout. Early days yet so maybe even ffmpeg folks will issue a compatable version before the second trial ends in a couple of months.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 15 Jul 17 - 11:57 AM

I compiled the latest ffmpeg source with the (adjusted) patch from the NG back in April (your link in the OP). I got the same result that AF did (his post 6 April 20:46).

ffmpeg recognises the stream and starts copying it
Stream #0:0 -> #0:0 (flac (native) -> flac (native))
but immediately stops.

Looking inside Firefox I can see that the actual sound is in a continuous serious of numbered 'chunks' with addresses like this:
https://vs-dash-ww-rd-live.bbcfmt.hs.llnwd.net/al/lossless/A1/390659324.m4s
These files only exist momentarily, and when I tried to catch one it was a 404.

So I think that patch adds the demuxer OK, but doesn't address the streaming process.

If you see any further patches mentioned, I'll have another go.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 15 Jul 17 - 06:44 AM

I'll check that out, thanks.

No word from the ffmpeg development crowd yet. I'm using i-sound for Windows 7/10 to capture the flac stream. I don't know if that is ffmpeg based or not. I dare say that now the flac stream is running again, a mpeg- dash supporting version of ffmpeg will surface.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: GUEST
Date: 15 Jul 17 - 06:37 AM

Here's a post from the BBC about this:
Summer of Sonic Love: Introducing Radio 3 Concert Sound

Click the 'Find out more...' link at the bottom of that piece to listen. You need an up-do-date version of Firefox on a desktop mahine. (But not ESR I find.)

I updated VLC (v2.2.4) and ffmpeg (v3.3.6): neither works. So you still need that patch it seems.

OT: I particularly enjoyed last week's Words_and_Music


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 15 Jul 17 - 03:59 AM

I recorded World on 3 from BBC lossless webstream last night, which has returned for Radio 3 for duration of the Proms!


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 22 Apr 17 - 04:02 AM

100% success, superb lossless recording of a superb concert!!!


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 21 Apr 17 - 02:21 PM

Yes, that looks good:
Lopa Kothari - Tinariwen in Concert


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 21 Apr 17 - 01:29 PM

I'm hoping to catch the Tinariwen Concert during World on 3 at 11pm this evening, I'll record a safety copy from the HLS stream as well on my spare PC.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 21 Apr 17 - 12:19 PM

The_stream plays with Firefox developer edition (54a). No luck with updated ffmpeg.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 21 Apr 17 - 05:20 AM

When I looked at that thread ffmpeg needed an upstream patch - I would have had to do that and recompile it myself. Presumably that patch will arrive in the Packman repos eventually. I'll refresh Packman and try it later. If not you'll have to follow ffmpeg bugzilla, or whatever. Or ask on the NG.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 21 Apr 17 - 04:50 AM

It's the recording side that I'm more interested in, and would like to be able to record the lossless stream using ffmpeg which will not process the digital audio in any way without being so commanded! I would like to know if the Audacity FLAC output is identical ti the FLAC input.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Thompson
Date: 21 Apr 17 - 04:42 AM

Well, you can always do the kludgy old thing of using an audio program like Audacity or Wiretap Pro to "listen" to the stream and record it!


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 21 Apr 17 - 04:16 AM

Yes, I saw how to fix it - I just wasn't sufficiently motivated. I'll try it again when I get Fx53 - it wasn't in the SuSE-Moz repo yesterday. (For various reasons I don't want Moz's own builds.)

I shall listen to the proms on DAB. Yes, I know - but I'm too old to notice - and the rooftop VHF aerial blew down. More importantly I now have a couple of nice Pure receivers with separate stereo speakers off ebay.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 21 Apr 17 - 03:55 AM

I'll try to help, first of all you must have latest version of Firefox - v53, and I seem to be running a 32bit version on my 64bit PC! Cheapest capture software is Audacity. Now you need to eliminate the missing "stereo mix" problem first, so set left button under mic icon to Windows WASAPI (don't ask!) then both recording and playback device to speakers. Audacity will then record the FLAC stream and you can export the file as FLAC.

I use i-sound for Windows 7/10 which I paid for but does the job very well.


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: DaveRo
Date: 21 Apr 17 - 03:32 AM

Well I hope it works better than it did for me. I saw that on usenet and hit all the problems they identified - it wouldn't play in Firefox, VLC, or even ffmpeg. The mime-type was arguably wrong (reminded me of trying to get realplayer streams like Britfolk working on Linux). But I learned a lot!

Radio 3 Concert Sound


Post - Top - Home - Printer Friendly - Translate

Subject: RE: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 20 Apr 17 - 05:06 PM

Now successfully captured the BBC lossless stream to file using latest version of i-sound for windows 7/10 - after initial teething troubles. It appears that the BBC will be broadcasting the entire Proms this year in lossless FLAC format for the first time which means that what you hear on line is exactly as it left the studio.

Clever innit!!!


Post - Top - Home - Printer Friendly - Translate

Subject: Tech: BBC Radio 3 Lossless stream
From: Bonzo3legs
Date: 17 Apr 17 - 06:47 AM

The BBC is currently testing a lossless stream of Radio 3 in flac format. The problem is how can this be captured? The obvious choice would be ffmpeg and there is protracted discussion here

Not easy it subjunctively would seem!!


Post - Top - Home - Printer Friendly - Translate
  Share Thread:
More...

Reply to Thread
Subject:  Help
From:
Preview   Automatic Linebreaks   Make a link ("blue clicky")


Mudcat time: 27 July 8:31 PM EDT

[ Home ]

All original material is copyright © 1998 by the Mudcat Café Music Foundation, Inc. All photos, music, images, etc. are copyright © by their rightful owners. Every effort is taken to attribute appropriate copyright to images, content, music, etc. We are not a copyright resource.