Sorry, This was my first post to the list and didn't realize reply only went to the sender.
------------------------------------------ Tim Taylor Electrical Engineer L-3 Communications [EMAIL PROTECTED] <BLOCKED::mailto:[EMAIL PROTECTED]> ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, March 07, 2008 11:59 AM To: Taylor, Tim M @ LINKABIT Subject: RE: OSD + V4L2 query We considered these options. Using 2 DM355s means having two linux machines and working out the synchronisation for both etc, which would have been hard. The FPGA idea is nice but our graphics are quite complex and we don't have much FPGA experience. We are working on a design using an MPEG-4 ASP + MP3 audio codec chip, which we have some experience with. Good luck with your project. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 07 March 2008 16:54 To: Jon Povey Subject: RE: OSD + V4L2 query We are looking at doing the same thing and we have come up with 2 options. 1. We can use 2 DM355 chips and daisy chain them and use one for Annotation(Text/Graphics in recorded video) and one for the actual recording and any additional Overlay(Text/Graphics only on the display). 2. Or using a small FPGA modify the 656 Stream coming from the decoder chip and do graphics and overlay that way... We have done this before and its not difficult. And Jon, You are correct there is no way to put any text in the recorded video only using a single 355. ------------------------------------------ Tim Taylor Electrical Engineer L-3 Communications [EMAIL PROTECTED] <BLOCKED::mailto:[EMAIL PROTECTED]> ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, March 07, 2008 11:46 AM To: [EMAIL PROTECTED] Cc: [email protected] Subject: RE: OSD + V4L2 query That is not possible (unless someone want to correct me). Your options are: - Put the text in the OSD buffer (/dev/fb/0) and it will be blended before output from VPBE - Draw the text onto the buffer in memory, using software - Add hardware to overlay the text before it goes into the VPFE. Just to note, the hardware (355 anyway) does not support blending OSD graphics before encoding video, if that is what you are trying to do. We have ended up using an external encoder chip to do this. From: [EMAIL PROTECTED] idsp.com [mailto:[EMAIL PROTECTED] x.davincidsp.com] On Behalf Of Faro Maza, Virginia Sent: 07 March 2008 15:43 To: [email protected] Subject: OSD + V4L2 query Hi all, I have been using the TI encode demo, where the video processing back end is used to display raw video frames (captured with the V4L2 driver) as well as an OSD layer of text in an LCD monitor. In the encode demo, each video frame is captured from /dev/video0 and then copied (using the hardware resizer) into /dev/fb/3. Simultaneously, dynamic data (e.g. CPU load) is written into the OSD window /dev/fb/0. The transparency is set through /dev/fb/2, which is opened as an attribute window. I would like to blend an OSD layer of text with my raw video before it is captured by the V4L2 driver. How can I do that? Many thanks, Virginia Faro-Maza American Dynamics Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ________________________________ Tyco Safety Products/CEM Systems Ltd. Registered in Northern Ireland: NI 25728. Registered Office: Unit 4 Ravenhill Business Park, Ravenhill Road, Belfast, BT6 8AW.. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the company. This email and any attachments are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender immediately and delete any copies in your possession. 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