SRF file format details I haven't figured out what every little byte does, but here's the rundown of the SRF file format. • File Header • 16 bytes - string - 'GARMIN BITMAP 01' • 64 bytes - four 32-bit ints, [4, 4, 2, 5] -- purpose unknown • 7 bytes - PString - '578' • 4 bytes - 32-bit int,  -- purpose unknown • 8 bytes - PString - version number ('1.00', '2.00', '2.10', or '2.20') • 4 bytes - 32-bit int,  -- purpose unknown • 16 bytes - PString - '006-D0578-XX' (where 'XX' changes) -- I assume this is Garmin's product code? • 3D Perspective Image Header • 12 bytes - three 32-bit ints, [0,16,0] -- purpose unknown • 2 bytes - 16-bit int -- height of image (just the 3D section, so it's 80) • 2 bytes - 16-bit int -- width of image (just the 3D section, 2880 or 2881) • 2 bytes - [16, 8] -- purpose unknown • 2 bytes - 16-bit int -- byte length of each line of image RGB data (16-bit RGB), so 'width * 2' • 4 bytes - all zeroes -- purpose unknown • 3D Perspective Image Alpha Mask • 4 bytes - 32-bit int,  -- Might specify the type of data that follows? • 4 bytes - 32-bit int, length of following data (width*height of 3D section) • width*height bytes - alpha mask data, 0 = opaque, 128 = transparent (across, then down) • 3D Perspective Image RGB Data • 4 bytes - 32-bit int,  -- Might specify the type of data that follows? • 4 bytes - 32-bit int, length of following data (width*height*2 of 3D section, as the RGB data is 16-bit) • width*height*2 bytes - RBG values as 'rrrrrggggg0bbbbb' bits (across, then down) • Overhead Perspective Image Header • Same as 3D image header, but width and height are for the overhead section -- 2881x80 for version 2.00 images, and 2520x70 for version 2.10 and 2.20 images. • Overhead Perspective Image Alpha Mask • Same as 3D image alpha mask, but width and height are for the overhead section.
I have a client who sent me 36 hours of sound files that have an.srf extension. They are outgoing phone calls that were recorded at a prison. I do not know what kind of recording device they use. Hi Guys, Has anyone found out how to convert the SRF files created by SAMSUNG SMART TV. I am able to copy the files - films recorded by my TV on my USB stick.
• Overhead Perspective Image RGB Data • Same as 3D image rgb data, but width and height are for the overhead section. • Footer • 56 or 136 bytes - all 0xFF -- these seem to pad the file to a particular block size.
Version 1.00 and 2.00 files use 136 bytes; newer versions use 56 bytes. • 1 byte - checksum byte -- use this byte to adjust so that the ascii sum of all bytes in the file is a multiple of 256. (sum% 256 == 0) Notes: all numbers are stored little-endian, I believe all the numbers are unsigned, the 'PString' I describe is a 32-bit integer containing the string length (excluding the integer) followed by the characters of the string, and the version 1.00 and 2.00 files use the 2881x160 size.
As a request by someone to make it easier to find this list on a front page, I couldn't think of anyway to do it except create a new thread. Below is a list of links to Custom Vehicle Icons for your GPS compatible unit.
Please link to the original thread for any discussions and how to's: A jpg file of most of the vehicles is listed here: This sight is updated regulary with hundreds of vehicles to choose from. Thanks for the great work, It's a great webpage. The Print Shop Deluxe here. Thanks to aarrgghh for creating some great custom vehicles! Star Wars Landspeeders Tron light cycles Darth Vaders Tie Fighter Star Trek Shuttles Batmobiles (40's,50's Tumbler) and Mach 5 (Speed Racer) TV Batmoblie Beatles Yellow Submarine And to all the others, there are so many! Thanks to raptrflite for creating these: Shelby Cobra, Airwolf, Corvette, Millenium Falcon, Mustang, Snowspeeder Ford Model T, Corvettes, Porsche's, Planes, Star Wars, Star Trek.
CaseyGuy wrote: I've used both 3D and 2D views of my nuvi 250W's maps, and I see just the top and back of the vehicle icon. Yes, when making a quick turn in a parking lot, I've seen another face of the vehicle flicker. But never for more that a fraction of a second. When does one see more than the top and back of a vehicle icon? If you mount the GPS to the rear window of your vehicle, you will see the front of the vehicle icon after it recalibrates. As you drive, the GPS will compensate for the new orientation & reverse the image revealing the front of the vehicle icon. It knows that a vehicle can not drive in reverse at speeds of 55mph thus knowing to make a change.
- by admin