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发表于 2006-3-2 11:43:11
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Post by wd_afei
gstreamer0.10 有啥新特性么？
[size=+2]GStreamer 0.10 - The Revolution
One and a half years. A large number of developers contributing. High expectations and a lot of pressure. The wait is over, GStreamer 0.10 has arrived. GStreamer 0.10 is a huge step forward for GNU/Linux and Unix multimedia. Power, stability, functionality, deployment, industry support, GStreamer 0.10 has it all. Prepare yourself for the revolution!
GStreamer is the leading multimedia framework for GNU/Linux and Unix systems and is being used in a wide range of applications such as music and video players, streaming servers, video editors, sound editors and software synthesizers.
GStreamer is a generic multimedia framework based around the concept of media pipelines linking elements, providing support for all manner of things. In GStreamer you'll find plug-ins supporting multimedia file formats, firewire and usb cameras, sound cards, Windowing systems, transcoding, networking, audio and video transformations and much more.
GStreamer has been ported to and runs on GNU/Linux, Microsoft Windows and Unix systems such as Sun Solaris and MacOS X.
[size=+1]Summary of major improvements in GStreamer 0.10 :
- Thread-safe
Designed from the ground up to be a thread-safe framework. GStreamer 0.10 will work flawlessly on multi-CPU and hyper-threaded systems which are getting more and more commonplace these days while hiding the complexity of threads away from most application developers. - Pre-rolling and seeking improvements
GStreamer 0.10 implements pre-rolling. This means all your media playback applications will do instant start/stop, and 'video scrubbing' when seeking, and has accurate audio/video synchronisation. - RTP Suppport
Thanks to the help of the Farsight project, Nokia, Instituto Nokia de Tecnologia and Fluendo, GStreamer 0.10 includes great support for the RTP protocol and has payload encoders and decoders for a wide variety of formats. This means creating VoIP applications with GStreamer will now be easy. - Fraction based frame rates
GStreamer 0.10 specifies frame rates in fractions. This allows for correct specification of commonly used frame rates and allows elimination of rounding errors which could otherwise cause loss of synchronization. - No more manual registry maintenance
One thing that constantly caused problems for our users in earlier releases was the registry which needed to be carefully maintained by packagers and application developers. GStreamer 0.10 takes care of keeping its internal registry in sync automatically and should through that make life better for many of our users. - Improved developer documentation
The community has put a lot of effort into improving the GStreamer documentation. The GStreamer core now follows a policy of not allowing API additions without the new API being fully documented. All GStreamer plug-ins also generate documentation now, making it easier for developers and users to see what kind of plug-ins are available and what the plug-ins are capable of. There are also a wide range of documents available now which explain the overall design of the various GStreamer sub-modules. - Better performance and smaller overhead
The GStreamer framework now has less overhead and higher performance than 0.8. Some benchmarks now show it running twice as fast. These speedups are especially an advantage for the use of GStreamer in embedded systems. - Improvements in clock handling
Our new master/slave clock implementation allows for network clocks which will ensure, when implemented in your application, that even if you have multiple devices spread out on your network running GStreamer-based applications, they will be playing or recording fully synchronized with each other. Our new clock selection algorithms makes sure the clocks of live sources are preferred over the clocks of sink elements, ensuring good results when decoding RTP streams, for instance. - Base classes
GStreamer 0.10 provides a set of element base classes which implement the common functionality of sinks, sources and transforms. They enable both easier plugin development and highly consistent behavior between plug-ins of the same type. - New controller subsystem
GstController takes over from the DParams infrastructure of GStreamer 0.8. GstController provides timed parameter changes synchronised with the data stream. This means that having your applications do timed parameter adjustments on elements is easier than ever, for instance timing the crossfading of two audio or two video tracks.
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