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Bug 300849 - sound stuttering when playing over wireless sftp:
sound stuttering when playing over wireless sftp:
Status: RESOLVED INVALID
Product: GStreamer
Classification: Platform
Component: gst-libav
git master
Other Linux
: Normal normal
: NONE
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Blocks:
 
 
Reported: 2005-04-16 10:21 UTC by Jeroen Zwartepoorte
Modified: 2005-10-03 11:41 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
Testcase/fixes for using buffering with sftp: (73.54 KB, patch)
2005-04-16 11:27 UTC, Jeroen Zwartepoorte 		none Details | Review

Description Jeroen Zwartepoorte 2005-04-16 10:21:09 UTC 
Version details: 0.8 branch

When playing an xvid via wireless (802.11g) using sftp: via nautilus/gnome-vfs,
video playback is smooth, but the audio stutters frequently. The exact same
thing (but then over ethernet) is fine. Same with wireless playback via SMB on
Windows.

I'd assume that when video stutters, it's likely a bandwidth problem, but with
audio? Perhaps the audio buffer is too smal??? (just guessing here)
Comment 1 Jeroen Zwartepoorte 2005-04-16 10:22:23 UTC 
I'm actually using totem for playback btw.
Comment 2 Christian Kirbach 2005-04-16 10:35:29 UTC 
strongly assume this is because of the reduced bandwith.
if the same video plays fine using ethernet (which is about 4x faster then 802.
11g) it is no error in the decoder.

maybe increasing buffer size can help but i think it is not easy for gstreamer 
to detect the medium (ethernet, modem, wireless lan) and adjust its buffer size.

also sftp seems to be slower than smb on the same medium.
Comment 3 Jeroen Zwartepoorte 2005-04-16 11:06:36 UTC 
I doubt this is a wireless bandwidth problem. I'm about 30cm away from the
airport extreme access point. And when i copy the video using nautilus + sftp:
it finishes in about 8min (350MB). So > 40MB/min or ~667KB/sec. I've tried it
with smb: and it still stutters.
Comment 4 Jeroen Zwartepoorte 2005-04-16 11:27:45 UTC 
Created attachment 45323 [details] [review]
Testcase/fixes for using buffering with sftp:

With the above patch, totem buffers the file before playing it back. It doesn't
fix the main problem though: playback still stutters a lot.
Comment 5 Jeroen Zwartepoorte 2005-04-16 11:29:40 UTC 
Ehm, ignore the po changes in the patch :)
Comment 6 Christian Kirbach 2005-04-16 15:19:36 UTC 
Does it also stutter when playing from local hard disk?