使用xwininfo -all我可以看到任何窗口的统计信息，以及它的子窗口
xwininfo: Window id: 0x3c000ba "Electro - The Slag & Prototype Raptor - Crescendo - YouTube - Mozilla Firefox"
Root window id: 0xa8 (the root window) (has no name)
Parent window id: 0xc001b8 (has no name)
2 children:
0x3c00175 (has no name): () 1388x876+0+0 +52+24
5 children:
0x3d210ab (has no name): () 854x510+225+197 +277+221
1 child:
0x3d210ac (has no name): () 854x510+0+0 +277+221
1 child:
0x40404de "plugin-container": ("plugin-container" "Plugin-container") 854x510+0+0 +277+221
2 children:
0x40404e1 (has no name): () 854x510+0+0 +277+221
0x40404df (has no name): () 1x1+-1+-1 +276+220
0x3ddbcf2 (has no name): () 640x390+225+162 +277+186
1 child:
0x3ddbcf3 (has no name): () 640x390+0+0 +277+186
1 child:
0x403d545 "plugin-container": ("plugin-container" "Plugin-container") 640x390+0+0 +277+186
2 children:
0x403d548 (has no name): () 640x390+0+0 +277+186
0x403d546 (has no name): () 1x1+-1+-1 +276+185
0x3dac7f9 (has no name): () 640x390+225+162 +277+186
1 child:
0x3dac7fa (has no name): () 640x390+0+0 +277+186
1 child:
0x4039d8b "plugin-container": ("plugin-container" "Plugin-container") 640x390+0+0 +277+186
2 children:
0x4039d8e (has no name): () 640x390+0+0 +277+186
0x4039d8c (has no name): () 1x1+-1+-1 +276+185
0x3c3f939 (has no name): () 640x390+225+197 +277+221
1 child:
0x3c3f93a (has no name): () 640x390+0+0 +277+221
1 child:
0x4011918 "plugin-container": ("plugin-container" "Plugin-container") 640x390+0+0 +277+221
2 children:
0x401191b (has no name): () 640x390+0+0 +277+221
0x4011919 (has no name): () 1x1+-1+-1 +276+220
0x3c0d1dc (has no name): () 1x1+0+97 +52+121
1 child:
0x3c0d1dd (has no name): () 1x1+0+0 +52+121
1 child:
0x4002c1e "plugin-container": ("plugin-container" "Plugin-container") 1x1+0+0 +52+121
2 children:
0x4002c40 (has no name): () 1x1+0+0 +52+121
0x4002c1f (has no name): () 1x1+-1+-1 +51+120
0x3c000bb (has no name): () 1x1+-1+-1 +51+23
Absolute upper-left X: 52
Absolute upper-left Y: 24
Relative upper-left X: 0
Relative upper-left Y: 0
Width: 1388
Height: 876
Depth: 24
Visual: 0x23
Visual Class: TrueColor
Border width: 0
Class: InputOutput
Colormap: 0x20 (installed)
Bit Gravity State: NorthWestGravity
Window Gravity State: NorthWestGravity
Backing Store State: NotUseful
Save Under State: no
Map State: IsViewable
Override Redirect State: no
Corners: +52+24 -0+24 -0-0 +52-0
-geometry 1388x876-0-0
Bit gravity: NorthWestGravity
Window gravity: NorthWestGravity
Backing-store hint: NotUseful
Backing-planes to be preserved: 0xffffffff
Backing pixel: 0
Save-unders: No
Someone wants these events:
KeyPress
KeyRelease
ButtonPress
ButtonRelease
EnterWindow
LeaveWindow
PointerMotion
Exposure
VisibilityChange
StructureNotify
FocusChange
PropertyChange
Do not propagate these events:
Override redirection?: No
Window manager hints:
Client accepts input or input focus: Yes
Initial state is Normal State
Displayed on desktop 0
Window type:
Normal
Window state:
Maximized Vert
Maximized Horz
Process id: 4087 on host jb
Frame extents: 0, 0, 0, 0
Normal window size hints:
Program supplied minimum size: 18 by 97
Program supplied maximum size: 1073741824 by 1073741824
Program supplied window gravity: NorthWestGravity
No zoom window size hints defined
No window shape defined
No border shape defined
但是，如果我尝试在给定子窗口的大小和偏移量的情况下从屏幕捕获，那么当另一个窗口浮动在它上面时，我可能会丢失数据，我在录制时切换到另一个选项卡，我调整子窗口的大小或移动子窗口窗户。相反，我想使用 ffmpeg 专门从该子窗口捕获。
想法？尖端？也许其他一些黑客来完成这个？谢谢 ：）