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Program Name: Mediastreamer

License Type: Freeware

Date Released: April 23, 2013


Mediastreamer v2.6.0 Instant Download

Mediastreamer Desciption:


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Mediastreamer2 is a powerful and lightweighted streaming engine specialized for voice/video telephony applications.It is the library that is responsible for all the receiving and sending of multimedia streams in linphone, including voice/video capture, encoding and decoding, and rendering.Features * Read/Write from to an alsa device, an oss device, a windows waveapi device * Send and receive RTP packets * Encode and decode the following formats: speex, G711, GSM, H263, theora, iLBC, MPEG4, and H264. * Read and write from/to a wav file * Read YUV pictures from a webcam (provided that it has video4linux v1 or v2 driver) * Display YUV pictures (using SDL library or native apis on windows) * Dual tones generation * Echo cancelation, using the extraordinary echo canceler algorithm from the speex library * Audio conferencing * Audio parametric equalizer using a FIR filter * Volume control, automatic gain controlMediastreamer2 can be extended with dynamic plugins, currently a H264 and an ILBC codec plugins are available.Portability * Linux/x86 Linux/x86_64 * Embedded Linux: ARM and Blackfin * Windows XP, Vista and 7 * Mac OS X * Google AndroidDesign and principlesEach processing entity is contained within a MSFilter object. MSFilter(s) have inputs and/or outputs that can be used to connect from and to other MSFilters.A trivial example to understand: * MSRtpRecv is a MSFilter that receives RTP packets from the network, unpacketize them and post them on its only output. * MSSpeexDec is a MSFilter that takes everything on its input assuming these are speex encoded packets, and decodes them and put the result on its output. * MSFileRec is a MSFilter that takes everything on its input and write it to wav file (assuming the input is 16bit linear pcm).MSFilters can be connected together to become filter chain. If we assemble the three above examples, we obtain a processing chain that receives RTP packet, decode them and write the uncompressed result into a wav file.The execution of the media processing work is scheduled by a MSTicker object, a thread that wakes up every 10 ms to process data in all the MSFilter chains it manages. Several MSTicker can be used simultaneously, for example one for audio filters, one for video filters, or one on each processor of the machine where it runs.Mediastreamer2 is easy to useIf your intent is simply to create audio and video streams, a simple API is defined in audiostream.h and videostream.h to create audio and video streams.If your intent is to add new functionalities to mediastreamer2, you'll be glad to know that implementing a mediastreamer2 filter is very straightforward. The mediastreamer2 filter encapsulation is very light.Thanks to this lightweighted framework, developers can concentrate on what matters: the implementation of the signal/image processing algorithm !




License: Freeware | Price: $0.00 | Size: 7.9 MB | Downloads (100)

Platform: Linux


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