For those that don't know it ffplay is part of the ffmpeg
package. This is what is first returned:

>Input #0, dash, from 'http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_full/cf/bbc_radio_three.mpd':
> Duration: N/A, start: 1625391731.200000, bitrate: N/A
> Program 0
> Stream #0:0(en): Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
> Metadata:
> variant_bitrate : 48000
> id : audio=48000
> Stream #0:1(en): Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
> Metadata:
> variant_bitrate : 96000
> id : audio=96000
> Stream #0:2(en): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
> Metadata:
> variant_bitrate : 128000
> id : audio=128000
> Stream #0:3(en): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp (default)
> Metadata:
> variant_bitrate : 320000
> id : audio=320000
>[dash @ 0x7fa5c00009c0] No longer receiving stream_index 1
>[dash @ 0x7fa5c00009c0] No longer receiving stream_index 2
>[dash @ 0x7fa5c00009c0] No longer receiving stream_index 3

and ffplay plays the 48 kbps stream. I've searched, I've
experimented, but I cannot get ffplay to use any of the
other streams.

Any ideas, or indeed a definite answer, would be welcomed.
--
Roger

Roger wrote:

> I've searched, I've
> experimented, but I cannot get ffplay to use any of the
> other streams.
>
> Any ideas, or indeed a definite answer, would be welcomed.

running it within an SSH session, so no audio/video devices available, I
had to use the "-nodisp" flag, but got success selecting the stream by
using the "-ast a:n" option where n is the index 0 to 3 for the Radio3 URL

ffplay
http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_full/cf/bbc_radio_three.mpd
-nodisp -ast a:3

rather than specify the index number, which could alter, you might be
able to specify the bandwidth something like -ast:a:128k but I didn't
figure that out ...

Andy Burns wrote:

> ffplay
> http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_full/cf/bbc_radio_three.mpd
> -nodisp -ast a:3
>
> rather than specify the index number, which could alter, you might be
> able to specify the bandwidth

cracked it, e.g.

-ast a:m:variant_bitrate:320000

On Sun, 4 Jul 2021 12:29:38 +0100, Andy Burns
<usenet@andyburns.uk> wrote:

>Roger wrote:
>
>> I've searched, I've
>> experimented, but I cannot get ffplay to use any of the
>> other streams.
>>
>> Any ideas, or indeed a definite answer, would be welcomed.
>
>running it within an SSH session, so no audio/video devices available, I
>had to use the "-nodisp" flag, but got success selecting the stream by
>using the "-ast a:n" option where n is the index 0 to 3 for the Radio3 URL
>
>ffplay
>http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_full/cf/bbc_radio_three.mpd
>-nodisp -ast a:3

Thank you, thank you, thank you. That was something I hadn't
tried and will look further to see if I understand it.
--
Roger

On Sun, 4 Jul 2021 15:45:23 +0100, Andy Burns
<usenet@andyburns.uk> wrote:

>Andy Burns wrote:
>
>> ffplay
>> http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_full/cf/bbc_radio_three.mpd
>> -nodisp -ast a:3
>>
>> rather than specify the index number, which could alter, you might be
>> able to specify the bandwidth
>
>cracked it, e.g.
>
>-ast a:m:variant_bitrate:320000

I'll try that later, I'm listening to something at the moment.
Thank you again.
--
Roger

On Sun, 4 Jul 2021 15:45:23 +0100, Andy Burns
<usenet@andyburns.uk> wrote:

>Andy Burns wrote:
>
>> ffplay
>> http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_full/cf/bbc_radio_three.mpd
>> -nodisp -ast a:3
>>
>> rather than specify the index number, which could alter, you might be
>> able to specify the bandwidth
>
>cracked it, e.g.
>
>-ast a:m:variant_bitrate:320000

The -ast was easy "audio stream specifier". I couldn't
understand the a: so I omitted it; it still works.

Adding -loglevel warning suppresses what I quoted in
my original post.

-loglevel warning -ast m:variant_bitrate:320000
--
Roger

On Sun, 04 Jul 2021 10:51:13 +0100, Roger
<invalid@invalid.invalid> wrote:

>>Input #0, dash, from 'http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_full/cf/bbc_radio_three.mpd':

The BBC world service streams are limited to 96000 and 48000.
The URL must have dash_low rather then dash_full thus:

>http://a.files.bbci.co.uk/media/live/manifesto/audio/simulcast/dash/uk/dash_low/ak/bbc_world_service.mpd

The BBC is using two CDNs which are apecified with either
ak or cf after the dash_???.
--
Roger

Roger wrote:

> The BBC is using two CDNs which are apecified with either
> ak or cf after the dash_???.

ak presumably being akamai, and cf being cloudflare, ISTR they used to
use limelight too?

On Sun, 4 Jul 2021 19:39:39 +0100, Andy Burns
<usenet@andyburns.uk> wrote:

>Roger wrote:
>
>> The BBC is using two CDNs which are apecified with either
>> ak or cf after the dash_???.
>
>ak presumably being akamai, and cf being cloudflare, ISTR they used to
>use limelight too?

Limelight Networks was llnw. I think cf is Amazon Cloudfront.
The BBC has switched from ak and llnw to ak and cf for the HLS
streams as well as the DASH streams.
--
Roger

Is this just radio 3? I got the distinct impression that the others tend to
be much lower quality streams. It is a great pity that bbc in their rather
warped view of the world pulled all their feeds to tunein radio thus
depriving all amazon devices of the ability to use multi room audio on their
output.
Brian

--

This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
briang1@blueyonder.co.uk
Blind user, so no pictures please
Note this Signature is meaningless.!
"Roger" <invalid@invalid.invalid> wrote in message
news:ao14egti5uv8uvakc9g8fusij0cf71dlrj@4ax.com...
> On Sun, 4 Jul 2021 19:39:39 +0100, Andy Burns
> <usenet@andyburns.uk> wrote:
>
>>Roger wrote:
>>
>>> The BBC is using two CDNs which are apecified with either
>>> ak or cf after the dash_???.
>>
>>ak presumably being akamai, and cf being cloudflare, ISTR they used to
>>use limelight too?
>
> Limelight Networks was llnw. I think cf is Amazon Cloudfront.
> The BBC has switched from ak and llnw to ak and cf for the HLS
> streams as well as the DASH streams.
> --
> Roger

In article <sbv1oo$1tm$1@dont-email.me>,
Brian Gaff \(Sofa\) <briang1@blueyonder.co.uk> wrote:
> Is this just radio 3? I got the distinct impression that the others tend
> to be much lower quality streams. It is a great pity that bbc in their
> rather warped view of the world pulled all their feeds to tunein radio
> thus depriving all amazon devices of the ability to use multi room audio
> on their output.

I've had multi room audio here for 40 years. Using obsolete stuff called
cable. Dunno why, as it's cheap and reliable. ;-)

--
*How do you tell when you run out of invisible ink? *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

The streams/files are available in a set of formats and choices of bits per
second. Top whack in the UK is 320k aac, but you can find lower rates, etc.

I can't comment on the ffplay issue as I fetch items using get-iplayer
first. Then play them with something like VLC as convenient.

I did use ffmpeg to fetch the flac version when the BBC tested that during
Proms. But again, usually stored it as a file, then listened to the file
using other AV apps.

Jim

In article <sbv1oo$1tm$1@dont-email.me>, Brian Gaff \(Sofa\)
<briang1@blueyonder.co.uk> wrote:
> Is this just radio 3? I got the distinct impression that the others tend
> to be much lower quality streams. It is a great pity that bbc in their
> rather warped view of the world pulled all their feeds to tunein radio
> thus depriving all amazon devices of the ability to use multi room audio
> on their output. Brian

--
Please use the address on the audiomisc page if you wish to email me.
Electronics https://www.st-andrews.ac.uk/~www_pa/Scots_Guide/intro/electron.htm
biog http://jcgl.orpheusweb.co.uk/history/ups_and_downs.html
Audio Misc http://www.audiomisc.co.uk/index.html

On Mon, 5 Jul 2021 14:34:14 +0100, "Brian Gaff \(Sofa\)"
<briang1@blueyonder.co.uk> wrote:

Top posted for Brian.

I have no knowledge of tunein radio or amazon devices.

All BBC radio stations are available using either HLS (HTTP Live
Streaming) or DASH (Dynamic Adaptive Streaming over HTTP). Apart
from the World Service all stations are available at four bit
rates: 320, 128, 96, and 48 kbps.

I have been listening live to HLS streams for some time and
wondered whether I could use the DASH streams. I couldn't work
out how to select the bit rate I wanted. Andy Burns came to my
rescue.

>Is this just radio 3? I got the distinct impression that the others tend to
>be much lower quality streams. It is a great pity that bbc in their rather
>warped view of the world pulled all their feeds to tunein radio thus
>depriving all amazon devices of the ability to use multi room audio on their
>output.
> Brian
--
Roger