How to find out if x264 is used?

[saddy001]

Hey there,

I'm want to try out the new and shiny x264 encoder and have compiled the source to enable that. How to find out if it is actually being used? I searched the /var/log/xrdp.log and .xorgxrdp*.log for the string "x264" and "codec" but no hits.

Do I need a specific log level?

[matt335672]

Welcome back @saddy001!

There's an INFO log message which occurs when the X264 encoder gets created:-

xrdp/xrdp/xrdp_encoder_x264.c

Lines 167 to 168 in 2b22636

	LOG(LOG_LEVEL_INFO, "xrdp_encoder_x264_encode: "
	"x264_encoder_open rv %p for width %d height %d",

On my devel build, these are the relevant log messages when I log in from Windows 11:-

[2025-03-21T11:35:30.730+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1407)] xrdp_mm_egfx_caps_advertise:
[2025-03-21T11:35:30.732+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x00080004 flags 0x00000000 (index: 0)
[2025-03-21T11:35:30.733+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x00080105 flags 0x00000000 (index: 1)
[2025-03-21T11:35:30.733+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x000a0002 flags 0x00000000 (index: 2)
[2025-03-21T11:35:30.734+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x000a0200 flags 0x00000000 (index: 3)
[2025-03-21T11:35:30.735+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x000a0301 flags 0x00000000 (index: 4)
[2025-03-21T11:35:30.735+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x000a0400 flags 0x00000000 (index: 5)
[2025-03-21T11:35:30.736+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x000a0502 flags 0x00000000 (index: 6)
[2025-03-21T11:35:30.737+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1433)]   version 0x000a0600 flags 0x00000000 (index: 7)
[2025-03-21T11:35:30.737+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1478)] Codec search order is H264, RFX
[2025-03-21T11:35:30.738+0000] [INFO ] [xrdp_mm_egfx_caps_advertise(xrdp_mm.c:1485)] Matched H264 mode

and :-

[2025-03-21T11:35:33.976+0000] [INFO ] [xrdp_encoder_x264_encode(xrdp_encoder_x264.c:167)] xrdp_encoder_x264_encode: x264_encoder_open rv 0x734d54305610 for width 1600 height 1200

If you're not seeing this, make sure you've compiled with --enable-x264, and that your client is advertising H264 support.

Hope this helps

[saddy001]

It seems that the Apache Guacamole HTML5 client does not support x264 :-(

The log:

[2025-03-21T14:34:23.461+0100] [INFO ] Socket 14: connection accepted from 127.0.0.1:53218
[2025-03-21T14:34:23.462+0100] [INFO ] Using default X.509 certificate: /etc/xrdp/cert.pem
[2025-03-21T14:34:23.463+0100] [INFO ] Using default X.509 key file: /etc/xrdp/key.pem
[2025-03-21T14:34:23.464+0100] [INFO ] Security protocol: configured [SSL|RDP], requested [SSL|HYBRID|RDP], selected [SSL]
[2025-03-21T14:34:23.472+0100] [INFO ] Connected client computer name: Guacamole RDP
[2025-03-21T14:34:23.472+0100] [INFO ] xrdp_load_keyboard_layout: Keyboard information sent by the RDP client, keyboard_type:[0x04], keyboard_subtype:[0x00], keylayout:[0x00000407]
[2025-03-21T14:34:23.473+0100] [INFO ] xrdp_load_keyboard_layout: model [] variant [] layout [de] options []
[2025-03-21T14:34:23.473+0100] [WARN ] Physical desktop dimensions (0x0) are invalid
[2025-03-21T14:34:23.474+0100] [WARN ] Received [MS-RDPBCGR] TS_UD_HEADER type 0xc006 is unknown (ignored)
[2025-03-21T14:34:23.474+0100] [WARN ] Received [MS-RDPBCGR] TS_UD_HEADER type 0xc00a is unknown (ignored)
[2025-03-21T14:34:23.572+0100] [INFO ] TLS connection established from 127.0.0.1:53218 TLSv1.3 with cipher TLS_AES_256_GCM_SHA384
[2025-03-21T14:34:24.375+0100] [INFO ] Client supports single-screen resizes by xrdp
[2025-03-21T14:34:24.376+0100] [INFO ] xrdp_caps_process_pointer: client supports new(color) cursor
[2025-03-21T14:34:24.376+0100] [INFO ] xrdp_process_offscreen_bmpcache: support level 1 cache size 7864320 bytes cache entries 2000
[2025-03-21T14:34:24.377+0100] [WARN ] Client Capability: not enough orders supported by client, client wants off screen bitmap but offscreen bitmaps disabled
[2025-03-21T14:34:24.377+0100] [INFO ] Client Capability: LARGE_POINTER_FLAG_96x96 supported
[2025-03-21T14:34:24.381+0100] [INFO ] Loading keymap file /etc/xrdp/km-00000407.ini
[2025-03-21T14:34:24.382+0100] [WARN ] local keymap file for 0x00000407 found and doesn't match built in keymap, using local keymap file
[2025-03-21T14:34:24.383+0100] [INFO ] TConfig: Loading GFX config file /etc/xrdp/gfx.toml
[2025-03-21T14:34:24.383+0100] [WARN ] No information is available to determine login screen DPI
[2025-03-21T14:34:24.384+0100] [WARN ] No DPI value is available to find login font
[2025-03-21T14:34:24.384+0100] [WARN ] Using the default_dpi of 96
[2025-03-21T14:34:24.386+0100] [WARN ] Ignoring obsolete SCP port value '3350'
[2025-03-21T14:34:24.387+0100] [INFO ] xrdp_wm_log_msg: sesman connect ok
[2025-03-21T14:34:24.387+0100] [INFO ] xrdp_wm_log_msg: Performing login request for user1
[2025-03-21T14:34:24.399+0100] [INFO ] xrdp_wm_log_msg: login was successful - creating session
[2025-03-21T14:34:24.786+0100] [ERROR] xrdp_rdp_recv: xrdp_channel_process failed
[2025-03-21T14:34:25.513+0100] [INFO ] xrdp_wm_log_msg: session is available on display 10 for user user1
[2025-03-21T14:34:25.514+0100] [INFO ] xrdp_wm_log_msg: Connecting to session
[2025-03-21T14:34:25.514+0100] [INFO ] loaded module 'libxup.so' ok, interface size 10440, version 4
[2025-03-21T14:34:25.515+0100] [INFO ] lib_mod_connect: connecting via UNIX socket
[2025-03-21T14:34:25.515+0100] [INFO ] lib_mod_log_peer: xrdp_pid=4057 connected to Xorg_pid=4070 Xorg_uid=4033 Xorg_gid=4034 client=127.0.0.1:53218
[2025-03-21T14:34:25.516+0100] [INFO ] xrdp_wm_log_msg: Connecting to chansrv
[2025-03-21T14:34:25.535+0100] [INFO ] Received memory_allocation_complete command. width: 1672, height: 942

https://guacamole.apache.org/doc/gug/guacamole-protocol.html#image-data

[matt335672]

Sadly, I think you're right:-

https://issues.apache.org/jira/browse/GUACAMOLE-377