This post’s goal is to guide a starter to analysis a crash by reading into the assemble code. But the example listed here is not a good one, because the crash point is not an obvious one, the real reason of the crash for this example is still remain uncovered. […]
jacky
329 posts
An issue of call establishment delay when conferencing with Polycom MCU RMX2000 The situation was 1. Meeting entities 1). Polycom MCU: Polycom RMX 2000, version ID: 8.3.0 2). Kedacom HD3 H600 SP4 2. Call scenario HD3 joined a multi-point conference with RMX2000. 1) All the H.225 and H.245 processes were […]
Most of the missing features are AVPF related, which is defined in RFC4585 and RFC5104. RFC4585: Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF) https://www.rfc-editor.org/rfc/rfc4585.txt RFC5104: Codec Control Messages in the RTP Audio-Visual Profile with Feedback (AVPF) https://www.rfc-editor.org/rfc/rfc5104.txt AVPF contains a mechanism for conveying such a message, […]
Found some features were missing after upgraded my blog to the latest version, WordPress v4.0, such as blogrolls. Tried to find it all over the dashboard, but got no luck. So I turned to the almighty Google, finally got the solution, and it’s really easy. All you need to do […]
[20150822 Update] For the record, I didn’t find the right ITU-REC document when I wrote this post, and misguided by a claim of HUAWEI VP9650 which says it has AES256 supported, but when I sending out a call from VP9650, it showed a new DH group DH1536, so I made […]
Encountered an issue of extreme long time compiling days ago, so we tried to add a time cost output in the Makefile to locate what on earth happened during the compilation. There are two Makefiles need to be modified, one is Linux based Makefile, another is Android based Makefile Linux […]
Working on a Loongson(www.loongson.cn) PC, goal is to make it a Meeting Terminal. Because its CPU is MIPS arch, there could be lots of unexpected problems, so the first thought hit us is WebRTC. This post is the first step to research into this topic.
The mechanism is simple like this: 1. Pull/Clone your own repository(which was forked from another repository) to a local PC. 2. Add remote source repository to a tag of the local copy. 3. Do local merge for the two repositories. 4. Resolve the conflications if exists. 5. Commit the local […]
I was using PageLines’s Platform theme for over 3 years, I really liked it. It’s simple, fast, and easy to use. The only problem is Platform theme does not mobile friendly, it’s sucked when you visit my blog by your smart phone. And this became the root reason of my […]
This question was origined from an experience of conferencing with different meeting terminals, including Polycom, Cisco, Tandburg, Huawei, etc. In our current implementation of SIP conference, we are using a stream_id tag in the Video Fast Update command to tell the peer we are requesting an Intra frame for a […]