On 03/12/2019 13:42, MacFH - C E Macfarlane wrote:
Please see below ...
On 03/12/2019 09:51, Jim Lesurf wrote:
I' ve now switched to using the new version of GIP and using the 'DASH'
approach for fetching. Many thanks for the new version. :-)
For TV this works fine. And for *most* radio it also works fine. But
since
I'm writing this you'll have guessed there is a trailing, "...however..."
:-)
Using " --type=radio --mode=daf " I can get 320k aac from R4/3 fine. But
when I tried some World Service examples ('More or Less") they came as
96k
aac. So far I can't find a sign or way of getting them as 320k.
I'm pretty sure I could get 320k from WS in the past. And the last time I
checked, Scotland was still within the UK. So am I doing something wrong,
or has something changed, or do I mis-remember... or is there a way
now to
get 320k from WS?
Yes, I've noticed this too. Fortunately for me, the only WS item I
download is "Science In Action", which usually I delete after I've
listened to it, so, as long as the quality is good enough to be
listenable, I don't really mind.
Science in Action is an interesting example. It has a podcast, which
means you have a choice of 128kbit/s and 64kbit/s. It is an .mp3 file.
Some here may scoff at .mp3. Although at 128kbit/s AAC is slightly
better than MP3, I think it is almost certain that 128kbit/s MP3 is
superior to 96kbit/s AAC. That is the more so when the BBC is
delivering 96kbit/s as HE-AAC v1 with the Spectral Band Replication
(SBR) extension. If a player does not support SBR, the bandwidth is
effectively reduced to 48kbit/s.
I was going to say that if 96kbit/s HE-AAC v1 was the best that was
available on the World Service, the podcast, if there was one, would be
a better bet. However I then looked at what was available from
get_iplayer v3.23 for the 28 November 2019 Science in Action (w3csym2r).
The only version is the podcast version, but with these modes.
modes: podcast:
dafhigh1,dafhigh2,dafhigh3,dafhigh4,hafstd1,hafstd2,hlastd1,dafstd1,
dafstd2,dafstd3,dafstd4,dafmed1,dafmed2,dafmed3,dafmed4,haflow1,haflow2,
hlalow1,daflow1,daflow2,daflow3,daflow4
The answer to Jim's question about how to get 320kbit/s audio from the
World Service, for some programmes at least, seems to be to use
--radiomode=dafhigh
In England too the best modes available for the Testing tomatoes episode
of World Service More or Less are hlamed and dafmed. The Radio 4
Election Special has a wider range of modes including dafhigh. I
suspect the answer is that it was set up at a time when the World
Service was restricted to 96kbit/s and has not been updated. I was
recently looking at sampling rates and found that Law in Action was
using a sampling rate of 44.1kHz long after everyone else moved to 48kHz
(and podcasts still use 44.1kHz). More or Less does have a podcast, so
you can at least get 128kbit/s MP3 from the World Service.
Best wishes
Richard
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