Owen Smith wrote: > OK it's gzip, thanks for that piece of information. As you say this is > lossless data compression, but I'm amazed there is enough of the headers > for it to make any real difference to the overall bit rate of the > stream. .
I did a bit of digging to understand more clearly what is happening. The intial http chunk of a DASH stream is called the MPD. This is an XML "file" which gives details about the stream and all the possible representation (e.g. data rates) (see https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html ). AFAICT only this is initial MPD "file" is compressed using gzip. With BBCiPlayer audio non uk the compressed header is usually less than 800 bytes. I suspect the main driver for the compressing the MPD would be for BBCiPlayer video programs where there could be very many representations and option and so MPD would be bigger. Since this is the initial "file" any delays in providing this file to a user will directly affect the "response time" a user perceives when they request to play a program. ------------------------------------------------------------------------ bpa's Profile: http://forums.slimdevices.com/member.php?userid=1806 View this thread: http://forums.slimdevices.com/showthread.php?t=104672 _______________________________________________ plugins mailing list plugins@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/plugins
