After more 2 000 000 (two million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions
A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome

2025-12-05: Celebrating the 23th anniversary of the UltraVNC (26th anniversary since the laying of the foundation stone): https://forum.uvnc.com/viewtopic.php?t=38130

2025-12-03: Could you please complete our poll/survey? Renaming UltraVNC files and service to be more clear: https://forum.uvnc.com/viewtopic.php?t=38128
There was a problem to vote, it is solved now! Thanks in advance!

2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page

2025-05-06: Forum password change request: https://forum.uvnc.com/viewtopic.php?t=38078

2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864

Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome

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UltraVNC 1.2.0.7 test - Download links

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Rudi De Vos
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UltraVNC 1.2.0.7 test - Download links

Post by Rudi De Vos »

Test 1
This wil be part of the upcoming 1207 in afew months, to discover bugs early some changes
are now released as test1
download
http://www.uvnc.eu/download/1207/ultrav ... _test1.zip

changes
w8hook fixes
[/http://www.uvnc.eu/download/1206/winvnc_w8test.zip

I added some check to the w8hook to verify if it was proper started.
both winvnc and w8hook need to be replaced to test
added new encoder provided by Adam walling
liblzma/xz cuts bandwidth by about half in my experience, at the
expense of more cpu and memory. which is why i've been hesitant about
pushing it into ultravnc.

but I use it for a singleclick/helpdesk distribution where everything
runs through a repeater and the bandwidth savings are very important
in that case. In some situations the bandwidth usage drops
dramatically since xz can have a very large dictionary (compared to
zlib's 32k limit)

additionally it uses a EncodeBulkRects function, like EncodeRect but
handles multple rects at once -- this way the compression does not
need to flush after every rect.
Please test
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Re: 1.2.0.7

Post by Skyfighter »

tested environment:
- server @ Win8.1 x64 Pro (ultravnc_1207_test1.zip\x64\winvnc.exe + w8hook64.dll on top of installed v1.2.0.6)
- clientA @ Win8.1 x64 Pro (ultravnc_1207_test1.zip\x64\vncviewer.exe)
- clientB @ Win7 x64 Pro (ultravnc_1207_test1.zip\x64\vncviewer.exe)

1) screen updates appear to be laggy / slower (e.g. mouse over effects) compared to v1.2.0.6+winvnc_w8test.zip
2) viewer always crashes on manual selection of encoding (hextile,ultra,u2); it doesn't matter if the manual encoding selection takes place before connecting or while viewer is connected; the only way for a successful connection is using "auto"-mode; (viewer-crash doesn't seem to harm the server-process)
Skyfighter
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Re: 1.2.0.7

Post by Skyfighter »

small addition:

3) observed a few times: viewer is successfully connected -> don't do anything with it -> viewer crashes within 5 Minutes (not sure if there is a fixed interval)
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Rudi De Vos
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Re: 1.2.0.7

Post by Rudi De Vos »

Internal: viewer crash caused by buffer overrun, some pseudoencoding require buffer extention.
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