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1 | !7 |
2 | |
3 | lib 1008985 // webcam |
4 | lib 1008987 // bridj |
5 | lib 1004016 // slf4j api |
6 | |
7 | import com.github.sarxos.webcam.Webcam; |
8 | |
9 | /** |
10 | * @author Bartosz Firyn (SarXos) |
11 | */ |
12 | |
13 | p { |
14 | List<Webcam> webcams = Webcam.getWebcams(); |
15 | |
16 | // NOTE! |
17 | /* |
18 | * Yes, I know we could do this in one loop, but I wanted to prove here |
19 | * that it's possible to have many native webcams open in the same time. |
20 | * I tested this example with 4 webcams simultaneously connected to the |
21 | * USB bus - 1 x PC embedded device, and 3 x UVC devices connected to |
22 | * the USB concentration hub, which was connected to the USB 2.0 port. |
23 | * It's working like a charm. |
24 | */ |
25 | |
26 | // USB BANDWIDTH! |
27 | /* |
28 | * As you probably know the USB has limited bandwidth and therefore it |
29 | * may not be possible to transfer images from as many cameras as you |
30 | * would like to wish. This example works when I'm using QQVGA (176x144) |
31 | * but fails with the error message when I want to fetch VGA (640x480). |
32 | */ |
33 | |
34 | // open all at once (this is the most time-consuming operation, all |
35 | // others are executed instantly) |
36 | for (Webcam webcam : webcams) { |
37 | System.out.format("Opening %s\n", webcam.getName()); |
38 | webcam.open(); |
39 | } |
40 | |
41 | // capture picture from all of them |
42 | for (int i = 0; i < webcams.size(); i++) { |
43 | Webcam webcam = webcams.get(i); |
44 | System.out.format("Capturing %s\n", webcam.getName()); |
45 | ImageIO.write(webcam.getImage(), "PNG", print(prepareProgramFile(String.format("test-%d.png", i)))); |
46 | } |
47 | |
48 | // close all |
49 | for (Webcam webcam : webcams) { |
50 | System.out.format("Closing %s\n", webcam.getName()); |
51 | webcam.close(); |
52 | } |
53 | } |
See https://github.com/sarxos/webcam-capture
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Snippet ID: | #1008989 |
Snippet name: | Take screenshot from all web cams & save [WORKS] |
Eternal ID of this version: | #1008989/6 |
Text MD5: | 977b55d78221986b2555668a91dbd52e |
Transpilation MD5: | b8f866e366bd1ac8d9ffe3040556db1f |
Author: | stefan |
Category: | javax / desktop / camera |
Type: | JavaX source code (desktop) |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2017-06-24 18:36:18 |
Source code size: | 1652 bytes / 53 lines |
Pitched / IR pitched: | No / No |
Views / Downloads: | 593 / 1271 |
Version history: | 5 change(s) |
Referenced in: | [show references] |