Trunk's Technical Blog
GoPro HERO4 Session Undocumented
Posted by Mark Kirschenbaum on
GoPro HERO4 Session / Codname: Rocky Point Firmware version: HX1.01.01.00 (Based on GoPro HERO3+ Silver code base ARM/Thumb)Linux/ arm 2.6.38.8 Kernel Processor: Ambarella A7L_BUB (core freq: 156mhz, arm freq: 600mhz, idsp freq: 133mhz) Sensor: On Semi AR0835HS - High speed sensor supporting 8 Mp (4:3) and 6 Mp (16:9) up to 60 fpsFlash: Micron MT29F2G08ABAEA - SLC NAND Flash Parallel 3.3V 2Gbit 256M x 8bitDDR: 2GB, 377Mhz, LPDDR2 Power Management Unit: AMS AS3715 Accelerometer: bma2x2 - Bosch Sensortec MEMS accelerometerA2D: TLV320 - Automotive Catalog Stereo Audio CODEC, 8- to 96 kHz config.gz (Linux version 2.6.38.8) (See Open...
GoPro HERO4 Session for Skydiving
Posted by Mark Kirschenbaum on
(Photo from GoPro Bomb Squad Like them!) Good With its 1.5" cube form-factor and 50% smaller it's great for skydivers worried about snag hazards. The new mounts and one button recording make it a good camera for the weekend warrior. Waterproof without an additional case is great for water based sports. Sleek wrist mount is perfect for Tandem Instructors using hand-cam. Bad The $399 price tag is expensive for its feature set (8MP stills / 1080@60fps - 25Mbps bitrate / Based...
GoPro LED Indicators vs Turned On Explained
Posted by Mark Kirschenbaum on
People have been asking me about a few companies making “GoPro LED Indicators.” In particular products called Cam-do GoPro LED and Pro On GoPro LED. In a nutshell, these products are extremely rudimentary and do not give you any feedback from the camera. These indicators only show that the camera is powered on, nothing else! It does not show: If it’s recording or in standby If it’s in the correct mode or even in the setup mode If the card is...
How to Install your GoPro Permanently
Posted by Mark Kirschenbaum on
This video shows you how to use a GoPro Low Profile Mount to permanently affix your GoPro to your helmet. This is generally recommened for skydiving helmets where you can drill into them, but can be used for other sports. Please use caution. Below is how the mount looks once installed.
What are the extra files in the HERO3
Posted by Mark Kirschenbaum on
I just learned something tonight after wondering what where those LRV and THM files on my GOPRO HERO3. Turns out the THM is just a JPG used in the future as a thumbnail for the video and the LRV is a super low res version of the video (432x240). I'm assuming the latter is for playback via wifi or simply as the streaming buffer when the smartphone is used as control. If you want to see this, just rename the...