Dear all ~~ With your help I have implemented the preview with capture interface ~~ Now i want to implement the preview with ovelay , and my camera support s ovelay ~ Who can tell me where I can find the document about ovelay sequcence ~ ? Or does there have a standard example source code ~ ? Thanks a lot ~ Best regards -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html