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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head> <title>Confused?</title> <meta name="author" content="Nemosoft Unv."> <meta name="description" content="Explanation of PCVC720 and Creative Labs Webcam 5"> <META http-equiv="Content-Type" Content="text/html; charset=iso-8859-15"> <link rel="STYLESHEET" href="webcam.css" type="text/css"></head><body><center><h1>Confusion about the PCVC720 and Creative Labs Webcam 5</h1></center><p>If you look closely at the table of supported and unsupported webcams, youwill see that the Philips <b>PCVC720 (ToUCam XS)</b> and <b>Creative Labs Webcam 5</b> arelisted in both colums. So are they supported by the PWC driver, or not?</p><p>The answer is: yes, and no (har, har. You probably saw that one coming :-)). Toput it simply, these cameras come in different versions. And although the modelnumber is (nearly) the same, the internals are quite different. For example,the earlier PCVC720K was based on the OmniVision OV511 chipset, but nowadays isbuilt upon a Philips chipset and is compatible with my driver. The situation for theCreative Labs Webcam 5 is exactly reversed: the older cams are supported by PWC,but not the newer ones.</p><p>So how can you tell them apart? The PCVC720K is easy; the new model is labelledas PCVC720K/40; the older model as PCVC720K/20. Unfortunately, this informationdoes not seem to be on the outside of the box (look closely!), but it <b>is</b>printed on the label attached to the USB cable of the camera. Of course you can't see that when the camera is in the box, so when you are in a shop and in doubt, ask a sales representative to open the box for you and take a look at the label.However, even if that is not possible and you buy the "wrong" camera,that's not a disaster since the PCVC720K/20 model is fully supported by the <a href="http://alpha.dyndns.org/ov511/">OV511 driver for Linux</a>.</p><p>The situation for the Creative Labs Webcam 5 is not so simple, unfortunately.The only way to tell them apart (that I currently know of) is by lookingat the USB Vendor & Product IDs. But to do that the cam must be plugged in,and thus out of the box, and thus you cannot return it if you want to... <b>I wouldvery much like to receive information on any differences between the two models.</b>Perhaps there is a difference in color, casing, packaging etc. that will set the two models apart.</p><p>To summarize:<table border="1"><caption>Webcam support table</caption><tr> <th>Webcam model</th> <th>USB Vendor ID</th><th>USB Product ID</th> <th>Supported by</th><tr><tr> <td>PCVC720K/20</td> <td>0x05A9</td><td>0x0518</td> <td>OV511</td></tr><tr> <td>PCVC720K/40</td> <td>0x0471</td><td>0x0313</td> <td>PWC</td></tr><tr> <td>'old' Creative Labs Webcam 5</td> <td>0x041E</td><td>0x400C</td> <td>PWC</td></tr><tr> <td>'new' Creative Labs Webcam 5</td> <td>0x041E</td><td>0x400D</td> <td>???</td></tr></table>As you can see, the IDs of the Webcam 5 differ by only one digit.<br/>BTW: don't bother to ask me which driver supports the new Webcam 5; I don't know.</p><p>To see the IDs from your plugged-in USB devices, execute the followingcommand:<pre> # grep ^P /proc/bus/usb/devices</pre></p><p>Hope this clears things up for you.</p><hr/><p><a href="index.html">Back to main page</a><hr><h6><i>2003-02-13 - Nemosoft Unv.</i></h6></body></html>⌨️ 快捷键说明
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