<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <meta name="Generator" content="Microsoft Exchange Server">  <style></style> </head> <body> <font face="Calibri, sans-serif" size="2"> <div style="text-align: justify; ">Hi, </div> <div style="text-align: justify; ">In my platform, there are two data streams from the camera, one(/dev/video0) is for view finder and the other(/dev/video1) is for image and video capture. </div> <div style="text-align: justify; ">My original design is to use a modified v4l2src and add one source pad tor v4l2src to support dual stream support. V4l2src read data from /dev/video0 and /dev/video1 and push the data stream to source pad0 and source pad1. </div> <div style="text-align: justify; ">As V4l2src is inherited from pushsrc, and there is only one source pad in v4l2src, is it possible to add the other source pad without modifying the pushsrc? What should I take care if I need to design that way? How to set the getrange function for the new added source pad? </div> <div style="text-align: justify; ">Many thanks.</div> <div style="text-align: justify; "><font face="Times New Roman, serif"> </font></div> <div style="text-align: justify; ">Best Regards!</div> <div style="text-align: justify; "><font face="Jokerman, fantasy" color="#404040"><i>Hu Gang</i></font></div> <div style="text-align: justify; "><font face="Times New Roman, serif"> </font></div> <div style="text-align: justify; "><font face="Times New Roman, serif"> </font></div> <div style="text-align: justify; "><font face="Times New Roman, serif"> </font></div> </font> </body> </html>