i.MX Processors中的主题 Re: Convert 8bit grayscale buffer to be accepted by vpuenc gstreamer element? https://community.nxp.com/t5/i-MX-Processors/Convert-8bit-grayscale-buffer-to-be-accepted-by-vpuenc-gstreamer/m-p/348033#M48217 <HTML><HEAD></HEAD><BODY><P>how did you change capture the grayscale? one can use the mxc_v4l2_capture.out to test, maybe you can give me the mail address, I can send the demo code for how to capture 8bit grayscale data to you. or if you have already create SR, pls tell me the SR number. I posted here failed.</P></BODY></HTML> Tue, 16 Sep 2014 09:38:43 GMT joanxie 2014-09-16T09:38:43Z Convert 8bit grayscale buffer to be accepted by vpuenc gstreamer element? https://community.nxp.com/t5/i-MX-Processors/Convert-8bit-grayscale-buffer-to-be-accepted-by-vpuenc-gstreamer/m-p/348032#M48216 <HTML><HEAD></HEAD><BODY><P>I have a monochrom image sensor connected to my imx6q board, capturing 30fps 1280x960 8bit grayscale images using gstreamer and the mfw_v4lsrc element.&nbsp; Converting from 8bit grayscale to I420 should be quick, but it appears memcpy out of a dma coherent buffer is very inefficient.&nbsp; What other tricks can I use to do this in hardware?&nbsp; Converting to I420 should involve just growing the buffer by 614,400 bytes and filling that area with 128.</P></BODY></HTML> Mon, 08 Sep 2014 21:01:20 GMT https://community.nxp.com/t5/i-MX-Processors/Convert-8bit-grayscale-buffer-to-be-accepted-by-vpuenc-gstreamer/m-p/348032#M48216 chriswhittenbur 2014-09-08T21:01:20Z Re: Convert 8bit grayscale buffer to be accepted by vpuenc gstreamer element? https://community.nxp.com/t5/i-MX-Processors/Convert-8bit-grayscale-buffer-to-be-accepted-by-vpuenc-gstreamer/m-p/348033#M48217 <HTML><HEAD></HEAD><BODY><P>how did you change capture the grayscale? one can use the mxc_v4l2_capture.out to test, maybe you can give me the mail address, I can send the demo code for how to capture 8bit grayscale data to you. or if you have already create SR, pls tell me the SR number. I posted here failed.</P></BODY></HTML> Tue, 16 Sep 2014 09:38:43 GMT https://community.nxp.com/t5/i-MX-Processors/Convert-8bit-grayscale-buffer-to-be-accepted-by-vpuenc-gstreamer/m-p/348033#M48217 joanxie 2014-09-16T09:38:43Z