marcosrautjr / bluecop-xbmc-repo

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Amazon plugin appears to ignore cachemembuffersize #226

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago
What steps will reproduce the problem?
1. Set cachemembuffersize to 16777216(16MB) in advancedsettings.xml
2. View Amazon video
3. Press 'o' and observe buffering
4. Pause movie

What is the expected output? What do you see instead?
I would expect to see the network usage stay high for an extended period of 
time while it is buffering and overlaid cache size to grow to something greater 
than 0. Instead, buffering stops rapidly within about 1MB of data buffered and 
it says "cache:0 B" in overlay.

What version of the product are you using? On what operating system?
OS: Ubuntu 12.04
Tested on XBMC v11 (from standard Ubuntu repository) and v12 (from xbmc ppa). 

Please provide any additional information below.
I tinkered for a few hours with this and saw no success at all. I've confirmed 
in log file that advancedsettings.xml is being read. YouTube add-on works with 
expected behavior (pausing causes buffering to occur for an extended period of 
time and "cache:" field increases into the MB's). With Amazon add-on, I have 
tested with both cachemembuffersize=0 (unlimited file based buffering) and 
various positive values to no effect.

Extensive Googling suggests that most people's problems like this occur because 
cachemembuffersize is ignored for "local" connections (i.e. NFS,SMB,etc.) and 
only used for "stream" connections (like http,rtp,webdav). But I would assume 
that Amazon streaming falls into the latter category, so this shouldn't apply 
here.

Note that in YouTube, the buffer gets to 100% before the "cache:" number gets 
above zero. But in Amazon, the network usage drops to zero immediately after 
buffer gets to 100% (which seems to be about 1MB based on time), so Amazon 
add-on seems to be behaving as if the "cache:" buffer size is actually zero (no 
caching?).

With the small buffering that it is doing (~1MB) I am still able to play videos 
with reasonably good quality (I am using the 600Kbit setting), but it pauses to 
buffer every 15-20 minutes or so, disrupting playback. This appears to be due 
to minor temporary fluctuations in available bandwidth (someone checking their 
email on same network?) that would likely be eliminated if Amazon add-on would 
support a larger stream buffer (16MB should be a few minutes worth of a 600Kbit 
datastream).

Original issue reported on code.google.com by xye.yan...@gmail.com on 17 Apr 2013 at 4:28