Audio portion of dash downloads slow

Mon Mar 14 05:29:00 PDT 2022

On 2022-03-14 03:02, Nick Payne wrote:

> No, here's an example of the quite different speeds for the audio and
> video portions of a dash download - the 158Mb of audio took 31 minutes
> to download...

It was 158 MB of audio data which is at least 8 times larger (more than
8* if it includes transfer protocol data as well as the audio data).

Maybe you know that &  are just being sloppy with your notation, but if
you use the wrong forms you'll likely get confused since the stats 
listed
carefully make use of both.  Look at this line:

> INFO: Downloaded: 158.00 MB (02:42:25) [2538] in 00:31:30 @ 0.67 Mb/s
> (dashfhd1/cf) [audio]

which has the total quantity and also the Mbps download speed.  That is
download speed in Bps (Bytes per sec) was

  158 * 1024 * 1024 / ((31 * 60) + 30)  =  87658 Bytes / sec

which is at least (87658 * 8) = 701264 bps (bits/sec)

which is 701264 / (1024 * 1024) = 0.6687 Mbps (ie the 0.67 Mb/s shown).

-- 
Jeremy Nicoll - my opinions are my own