Technology « Coert Vonk

Edit AVCHD 24p using Adobe Premiere Pro CS5

Starting with CS4, Adobe Premiere Pro supports AVCHD video. For owners of AVCHD camcorders, this is an huge step forward. Moving from CS3 to CS4/CS5 If you were one of the early adapters, you might have followed my guide Editing AVCHD 24p using Adobe Premiere Pro CS3. If you made the jump to CS4 or CS5, you [...] «read more»

Living with Adobe Encore CS4/CS5

Encore is one of those acquisition products, that were shaky from the start and never fully stabilized. Having said that, let’s try to make the best of it. Inconsistent state information Creating a Blu-ray image is challenging to Encore. More often than not, the BD creation will fail with error messages such as: Blu-ray Error: “device not ready”, [...] «read more»

SIP/SDP trace using MilkFish as outbound proxy

Example VoIP SIP message flow for REGISTER, INVITE and BYE using the OpenSER outbound proxy. Focus is on the transport address in SIP and SDP/RTP. «read more»

Transport address in SIP and SDP messages

Examples of typical event sequences for SIP phone registering or placing/receiving a call. Both with route-able IP address (without NAT), and with private IP address (with Network Address Translation). «read more»

VoIP telephony and DD-WRT

Paying any amount for a mostly idle land line phone seems excessive. Especially when knowing that good alternatives are available. The introduction to this article is shamelessly based on section 8 of Unlimited free calling with Google Voice. «read more»

Resume

15 years of experience in embedded software design and implementation. Powerful combination with my hardware design background. Proven knowledge of writing optimized, robust device drivers. Fluent in the use of GNU software development tools. Strong coding skills in C (13 yr.) , C++ (4 yr), Pascal (7 yr.), Assembler (4 yr.). Experience with a variety of hardware diagnostic tools to bring up new firmware: ICE (MIPS, PPC, i960 et al), BDM, logic analyzers and scopes. «read more»

Installing and Using WordPress under Fedora Linux

Read about how this web site was done. My notes on installing WordPress and its dependencies under Fedora Linux. From my favorite theme to plug-ins such as NextGEN Gallery, CAPTCHA, Inline Google Docs, Lightbox 2 and PHP Execution. Contains a working example of extracting information from another MySQL database using PHP. «read more»

Automated backup using D-Link DNS-321 review and HOWTO

After 6 years to faithful service, the SMART daemon on my backup server was getting serious and it became time to retire it the server. Many new cheap network attached storage (NAS) boxes had become available, using only a fraction of the space and electricity. I ended up buying a D-Link DNS-321 for $90 and a Samsung 1.5 TByte hard disk for $100. Over time, I will add another hard disk, so that daily backups can alternate between the two disks. This will give me twice the snapshots for the same reliability as RAID1, without the hassle of rebuilding. The D-Link DNS-321 (or the near identical DNS-323, or CH3SNAS) is a Network Attached Storage (NAS) solution that can hold up to two drives. It makes the drive available as SMB or NFS shares. It has a little ARM processor, 64 MByte of memory and a GigE interface. «read more»

Secure Internet Appliance for SOHO

Describes how to build a Firewall, VPN Server and Wireless Access Point on a single board computer using open source software components. Other features are a stateful firewall, versatile WiFi access point, wireless security, NAT, local DNS server, dynamic host configuration server, NTP server, secure shell and highly configurable. «read more»

Upscaling to High Definition

Describes AviSynth scripts to upscale standard definition PAL video to High Definition 1920x1080p24. «read more»

Coert Vonk