unknown encoding received <Encoding.TIGHT: 7>

[ulmitov]

No handler for TIGHT ?

vncdotool version
last master ersion

2023-07-13 18:00:19 [INFO] Starting factory <vncdotool.client.VNCDoToolFactory object at 0x7f4598869d60>
2023-07-13 18:00:19 [INFO] Using protocol version 3.8
2023-07-13 18:00:19 [INFO] Offered <AuthTypes.NONE: 1>
2023-07-13 18:00:19 [INFO] Native PixelFormat(bpp=32, depth=32, bigendian=False, truecolor=True, redmax=255, greenmax=255, bluemax=255, redshift=0, greenshift=8, blueshift=16) bytes=4
2023-07-13 18:00:19 [INFO] Offering <Encoding.RAW: 0>
2023-07-13 18:00:19 [INFO] Offering <Encoding.PSEUDO_DESKTOP_SIZE: -223>
2023-07-13 18:00:19 [INFO] Offering <Encoding.PSEUDO_LAST_RECT: -224>
2023-07-13 18:00:19 [INFO] Offering <Encoding.PSEUDO_QEMU_EXTENDED_KEY_EVENT: -258>
2023-07-13 18:00:19 [INFO] x=0 y=0 w=800 h=624 <Encoding.RAW: 0>
2023-07-13 18:00:24 [WARNING] 'Timed Out', retrying in 0 seconds...
2023-07-13 18:00:25 [INFO] x=0 y=24 w=800 h=600 <Encoding.TIGHT: 7>
2023-07-13 18:00:25 [INFO] unknown encoding received <Encoding.TIGHT: 7>
2023-07-13 18:00:25 [INFO] x=36992 y=44545 w=65496 h=65504 '<Encoding.UNKNOWN: 104a46>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 104a46>'
2023-07-13 18:00:25 [INFO] x=18758 y=1 w=257 h=96 '<Encoding.UNKNOWN: 600000>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 600000>'
2023-07-13 18:00:25 [INFO] x=65534 y=15 w=1325 h=610 '<Encoding.UNKNOWN: 6b50>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 6b50>'
2023-07-13 18:00:25 [INFO] x=3532 y=42706 w=255 h=56064 '<Encoding.UNKNOWN: 4300140d>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 4300140d>'
2023-07-13 18:00:25 [INFO] x=3857 y=3852 w=5137 h=4113 '<Encoding.UNKNOWN: 16151417>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 16151417>'
2023-07-13 18:00:25 [INFO] x=7730 y=8222 w=6939 h=7741 '<Encoding.UNKNOWN: 2b2e2432>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 2b2e2432>'
2023-07-13 18:00:25 [INFO] x=18495 y=19531 w=18239 h=17988 '<Encoding.UNKNOWN: 505a7361>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 505a7361>'
2023-07-13 18:00:25 [INFO] x=20565 y=27734 w=17478 h=25736 '<Encoding.UNKNOWN: 656c767a>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 656c767a>'
2023-07-13 18:00:25 [INFO] x=32898 y=32845 w=24717 h=38796 '<Encoding.UNKNOWN: 7d96737e>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 7d96737e>'
2023-07-13 18:00:25 [INFO] x=32891 y=65499 w=67 h=287 '<Encoding.UNKNOWN: 21212d27>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 21212d27>'
2023-07-13 18:00:25 [INFO] x=11608 y=12336 w=22713 h=31593 '<Encoding.UNKNOWN: 7bb9b9b8>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 7bb9b9b8>'
2023-07-13 18:00:25 [INFO] x=42662 y=47289 w=47545 h=47545 '<Encoding.UNKNOWN: -46464647>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: -46464647>'
2023-07-13 18:00:25 [INFO] x=47545 y=47545 w=47545 h=47545 '<Encoding.UNKNOWN: -46464647>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: -46464647>'
2023-07-13 18:00:25 [INFO] x=47545 y=47545 w=47545 h=47545 '<Encoding.UNKNOWN: -46464647>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: -46464647>'
2023-07-13 18:00:25 [INFO] x=47545 y=47545 w=47545 h=47545 '<Encoding.UNKNOWN: -46464601>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: -46464601>'
2023-07-13 18:00:25 [INFO] x=49152 y=4360 w=600 h=800 '<Encoding.UNKNOWN: 3011100>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 3011100>'
2023-07-13 18:00:25 [INFO] x=529 y=259 w=4353 h=65476 '<Encoding.UNKNOWN: 1f0000>'
2023-07-13 18:00:25 [INFO] unknown encoding received '<Encoding.UNKNOWN: 1f0000>'
2023-07-13 18:00:25 [INFO] x=261 y=257 w=257 h=257 <Encoding.RAW: 0>
2023-07-13 18:00:25 [INFO] Stopping factory <vncdotool.client.VNCDoToolFactory object at 0x7f4598869d60>

[pmhahn]

Probably a network issue, after which the data gets interpreted wrongly:

2023-07-13 18:00:24 [WARNING] 'Timed Out', retrying in 0 seconds...

But <Encoding.TIGHT: 7> is also not implemented; basically only <Encoding.RAW: 0> is implemented.

[KarimGeiger]

I seem to have a similar issue when trying to connect to the PiKVM VNC server. It fails with the following message in the server logs:

[main]: ... has_tight [] -- False
[main]: ... tight_jpeg_quality [] -- 0
[main]: ... has_h264 [] -- False
[main]: Error: Tight JPEG encoding is not supported by client

Since you mentioned that Tight is not implemented as an encoding, and the PiKVM docs mention this as a requirement, I'd assume there is no way around this.

As someone with zero knowledge of how VNC encodings work: Is this something that could relatively easily be added to vncdotool, or would this be a greater effort or maybe even impact functionality like expect?

[pmhahn]

While refactoring vncdotool I already had some quick thoughts on adding support for other encoding as vncdotool currently only supports RAW.

• You would have to extend vncdotool.rfb.RFBClient._handleRectangle() to handle other formats. For JPEG that should be easy as we already depend on Pillow, which supports many formats: get the right number of octets from the network stream, pass it to Pillow for decoding, paste the result into the screen buffer.
• Add the new format to vncdotool.rfb.RFBClient.SUPPORTED_ENCODINGS.