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作者 Re:How to use a Logitech WebCam in Java [Re:sursino]
rockw99





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於 2004-10-04 14:26 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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之前看到的好像都是frame rate= 1 fps的實作. 如果是15 fps以上呢?
在applet上畫出來恐怕就有問題了吧?? (Image物件的redraw預設是100ms才發生一次, 我又不想改這個值,免得把CPU全吃光光)

有哪位大大研究過這個嗎? 用JAI或JMF是否有解?

我的狀況是這樣的, 我希望能在頻寬無限制的狀況下, 連接一台能夠全速產出30fps , 320X240大小MJPEG的DVR,在applet上也能全速以30fps畫出所接收到的MJPEG, 迄今只知道僅用AWT是沒辦法達成的


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作者 Re:How to use a Logitech WebCam in Java [Re:Eva]
mengfei929i





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於 2004-10-24 20:19 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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能不能把我的视频通过网络传出去呢?
哪位实现一下大家瞧瞧?


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作者 Re:How to use a Logitech WebCam in Java [Re:mengfei929i]
seeyouag





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於 2005-01-22 11:00 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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mengfei929i wrote:
能不能把我的视频通过网络传出去呢?
哪位实现一下大家瞧瞧?

en 对亚 那位大大 可以完成 show一下吗?


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作者 Re:How to use a Logitech WebCam in Java [Re:Duncan]
mediakid





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於 2005-01-25 02:24 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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43...
用 JMF 附的 JMStudio 來使用 WebCam,播放起來(也可以 export 成檔案)流暢多了多了(我裝 Performance Pack for Windows 有用 native code)。

不好意思,新手問個笨問題Blush,Performance Pack for Windows ,是指JMF的某個版本還是某個pack呢?


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作者 Re:How to use a Logitech WebCam in Java [Re:Eva]
T55555

Java, Ruby, Haskell

版主

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於 2005-01-26 02:48 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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FYI. Maybe related information:

About Java / TWAIN
http://today.java.net/pub/a/today/2004/11/18/twain.html
http://today.java.net/pub/a/today/2005/01/25/twain.html


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作者 Re:How to use a Logitech WebCam in Java [Re:sog]
yenmail





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於 2005-03-28 13:26 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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sog wrote:
yuzhang 參考我們研究室學弟弄得小東東..

http://140.116.86.173/webcam/index4.html


sog您好..
請問...連結是不是斷了啊..
我專題有用到...想看看說

有大大可以貼個範例出來嗎
謝謝嚕


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作者 Re:How to use a Logitech WebCam in Java [Re:Eva]
mitchbox





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於 2005-08-13 21:46 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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奇怪∼我試了之後只有出現以下訊息

Capture device ready
Capture thread starting

可是沒有任何動靜,開JMStudio>File>Capture
畫面中也沒有任何影像***∼

能否請哪位測試成功的大大教一下∼

感恩喔∼∼


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作者 Re:How to use a Logitech WebCam in Java [Re:Eva]
konasJSP





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於 2006-04-08 22:12 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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之前在學校做過,本來想做WEBCAM的監視系統
而且還能遠端監控
錄影拍照等等
所以打算能夠一台電腦同時抓16台CAM
但是JVM好像最多只能抓到一個
看了很多討論(國外)
好像真的只能抓一個
唉~~~

另外、如果要錄影、拍照之類的話效率很差
APPLET是可以收到遠端的CAM影像


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作者 Re:How to use a Logitech WebCam in Java [Re:Duncan]
csnick2001





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於 2007-09-17 11:08 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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Duncan wrote:
啟動 JMStudio,執行 File->Capture,選擇你的 WebCam device,拉下 [Video Size] and [Bits per pixel] combo box 看看到底你的 WebCam 支援什麼。

你可以順便就以 JMStudio 來從你的 WebCam 擷取影像,來確保 driver 沒問題。

duncan大
我照你說的步驟執行後
沒有影像只有聲音耶~
請問我有哪邊沒設定到嗎??
我的WEBCAM都安裝好了!


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作者 Re:How to use a Logitech WebCam in Java [Re:Duncan]
ru6nj4fu6g4





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於 2009-06-25 15:01 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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我則是遇到很怪的情況
一直出現
No device found [ vfw:Microsoft WDM Image Capture (Win32):0]
Exception in thread "main" java.lang.NullPointerException
  at Test.<init>(Test.java:41)
  at Test.main(Test.java:78)
可是我JMStudio 都能正常動作也能用Capture來看視訊
但是就唯獨程式不行


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作者 Re:How to use a Logitech WebCam in Java [Re:ru6nj4fu6g4]
ru6nj4fu6g4





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於 2009-06-25 16:40 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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然後我檢查JMF Device 是有三個的
可是我用寫Java去抓Device數 竟然是0個!!
然後我重新安裝JMF
結果在Detect Capture Devices 時 都會強制性重開!!
小弟我真的需要高手幫忙了
遇到此番越弄越糟的情況 囧


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作者 Re:How to use a Logitech WebCam in Java [Re:Eva]
whosy6314





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於 2011-03-16 21:45 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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小弟現在照著上面各位大大的步驟一步一步去操作
我的問題是JMF有畫面出來 但是java程式在執行的的時候卻有以下錯誤產生

Exception in thread "main" java.lang.NullPointerException
  at Test.<init>(Test.java:46)
  at Test.main(Test.java:84)
Requested format not supported

請問小弟哪裡設定不好?
是java程式抓不到webcam嗎?
該如何解決?


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作者 Re:How to use a Logitech WebCam in Java [Re:Duncan]
jimmychen338





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於 2012-05-17 11:13 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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16 or 24 or 32(bit)
is invalid
I need your help


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作者 Re:How to use a Logitech WebCam in Java [Re:jimmychen338]
teddy35119





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於 2013-07-18 21:58 user profilesend a private message to userreply to postreply to postsearch all posts byselect and copy to clipboard. 
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不好意思推了舊文....

我爬文了許久
但錯誤一直出現
No device found [ vfw:Microsoft WDM Image Capture (Win32):0]
Exception in thread "main" java.lang.NullPointerException
  at jmfdemo.Test.<init>(Test.java:46)
  at jmfdemo.Test.main(Test.java:82)

我用jm studio 有抓到
vfw:Microsoft WDM Image Capture (Win32):0

但程式碼就是一直出現錯誤

請各位大大解救

(縮略圖,點擊圖片鏈接看原圖)


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