[jitsi-dev] About screen sharing and remote control


#1

Hello,

I observed certain issues regarding screen sharing (Debian 32-bit, Google Talk protocol, different locations, in the same LAN these issues are not that pronounced).

1. When screen sharing is enabled, the receiving side sees a gray screen that has only the moving parts updated on it.
Only after about 10-15 seconds the whole screen is updated (from left to right). I saw this over google talk and this behaviour is consistent (even webcam has it, but it starts faster). After the whole screen updated, it worked fine.

2. The "enable remote control button" does not work sometimes. Sometimes it does. Sometimes it does for a few seconds, then after 1-2 minutes it works again (the box is checked all the time). If the remote control does not work, disabling and enabling it does not help.

···

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O zi buna,

Kertesz Laszlo


#2

Hi Kertesz,

Le 27/05/11 07:56, Kertesz Laszlo a �crit :

Hello,

I observed certain issues regarding screen sharing (Debian 32-bit, Google Talk protocol, different locations, in the same LAN these issues are not that pronounced).

1. When screen sharing is enabled, the receiving side sees a gray screen that has only the moving parts updated on it.
Only after about 10-15 seconds the whole screen is updated (from left to right). I saw this over google talk and this behaviour is consistent (even webcam has it, but it starts faster). After the whole screen updated, it worked fine.

Desktop streaming produces bigger "images" than webcam (especially if the shared screen resolution is big). So the first frame sent (a keyframe) is composed of a lot of packets and if one (or more) is dropped or lost, receiver cannot display correctly the stream. As next frames sent are the differences between the previous ones, it can explain why you see only the moving parts.

2. The "enable remote control button" does not work sometimes. Sometimes it does. Sometimes it does for a few seconds, then after 1-2 minutes it works again (the box is checked all the time). If the remote control does not work, disabling and enabling it does not help.

Google servers limit the bandwidth of signalling channel, moving mouse produces a lot of signaling contents and that's why the remote control stop working. This issue seems to _not_ appears with jabber.org accounts.

···

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Seb


#3

Hello,

Could you please add a "stop receiving video" button (or toggle receiving) to the call window? The receiving end should be in control of what he wants to receive.

···

--
O zi buna,

Kertesz Laszlo