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Song et. al., describes the goal of Android media framework is to provide a consistent interface for all services provided by libraries. The core part of the media framework is composed of libmediaplayerservice, libmedia and libmedia_jni [4]. The main function is to display the information of title, lyrics and time about the song, and some of the media player’s nctional keys, such as play, pause, stop, last, next, backward and forward, and then display the lyrics [8].

Figure 7 Song et. al., describes the goal of Android media framework is to provide a consistent interface for all services provided by libraries. The core part of the media framework is composed of libmediaplayerservice, libmedia and libmedia_jni [4]. The main function is to display the information of title, lyrics and time about the song, and some of the media player’s nctional keys, such as play, pause, stop, last, next, backward and forward, and then display the lyrics [8].

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Many users like to watch video by a mobile phone, but the media player has many limitations. With a rapid development of communication and network, multimedia based technology is adopted in media player. Different approaches shows in this paper are plug-in extension technology, multimedia based on hierarchy, media player based on file browser, media player based on FFmpeg (Fast Forward Moving Picture Expert Group), media player based on file server. ABSTRACT Council for Innovative Research
Many users like to watch video by a mobile phone, but the media player has many limitations. With a rapid development of communication and network, multimedia based technology is adopted in media player. Different approaches shows in this paper are plug-in extension technology, multimedia based on hierarchy, media player based on file browser, media player based on FFmpeg (Fast Forward Moving Picture Expert Group), media player based on file server. ABSTRACT Council for Innovative Research
2) Architecture of plug-in software platform on FFmpeg Wu and Xiao show the development of application needs powerful decoding and container that support more video encoding formats. It describes the upper layer is Java, which provides the application development interface (Android_FFmpeg API). The bottom layer is the C/C++ layer, which is the core layer used to process audio/video data with FFmpeg [8].
2) Architecture of plug-in software platform on FFmpeg Wu and Xiao show the development of application needs powerful decoding and container that support more video encoding formats. It describes the upper layer is Java, which provides the application development interface (Android_FFmpeg API). The bottom layer is the C/C++ layer, which is the core layer used to process audio/video data with FFmpeg [8].
The bottom layer involves the audio/video data processing core (libffmpeg.so). It packages the related audio/video function of FFmpeg. It includes decoding of all major audio/video, synchronization between multiple media streams [13], completing the display and playback features of the audio/video [14], after decoding low-level audio/video equipment libraries (libvideo.so; libaudio.so) [1]. The decoding of selected components achieves the decoding format from the header of the native file or stream media file. It also selects corresponding decoder to decode compressed media streams [1].
The bottom layer involves the audio/video data processing core (libffmpeg.so). It packages the related audio/video function of FFmpeg. It includes decoding of all major audio/video, synchronization between multiple media streams [13], completing the display and playback features of the audio/video [14], after decoding low-level audio/video equipment libraries (libvideo.so; libaudio.so) [1]. The decoding of selected components achieves the decoding format from the header of the native file or stream media file. It also selects corresponding decoder to decode compressed media streams [1].
Decode layer is used to gather information of the media file formats, and then decodes audio/video streams by th corresponding decoder, and then synchronize the audio/video streams. It includes all kinds of decoders, the decode choosing module and the synchronize module [8], [15]. Fig 3: Flow Chart of Decode layer
Decode layer is used to gather information of the media file formats, and then decodes audio/video streams by th corresponding decoder, and then synchronize the audio/video streams. It includes all kinds of decoders, the decode choosing module and the synchronize module [8], [15]. Fig 3: Flow Chart of Decode layer
Data extract layer is used to read the media file.
Data extract layer is used to read the media file.
Jin et. al., shows common media codec mechanism, so it is easily been integrated to multimedia files such as audio, video and pictures. Android Media Player plays audio files such as local files, resource files and network file streams from many sources. This includes media player plays audio files from SD card and displays the lyrics synchronously [3], [10].
Jin et. al., shows common media codec mechanism, so it is easily been integrated to multimedia files such as audio, video and pictures. Android Media Player plays audio files such as local files, resource files and network file streams from many sources. This includes media player plays audio files from SD card and displays the lyrics synchronously [3], [10].
Transplantation of other files and then, files are compiled into .so files. These .so files are as components to provide the functions. The java applications invoke these files through JNI [4].
Transplantation of other files and then, files are compiled into .so files. These .so files are as components to provide the functions. The java applications invoke these files through JNI [4].
FFmpeg provides powerful media encode/decode functions. First of all register all kinds of codec defined in FFmpeg t system. So that the audio/video files can be decoded by FFmpeg. Then open the media file from local files and get the fil stream information and the file stream type. After these, choose a appropriate decoder and allocate memory for dat structures AVCodec, AVFormatContext, AVStream.. And then divide the file stream into audio stream and video strear [4].
FFmpeg provides powerful media encode/decode functions. First of all register all kinds of codec defined in FFmpeg t system. So that the audio/video files can be decoded by FFmpeg. Then open the media file from local files and get the fil stream information and the file stream type. After these, choose a appropriate decoder and allocate memory for dat structures AVCodec, AVFormatContext, AVStream.. And then divide the file stream into audio stream and video strear [4].
Rowe and Smith shows the playback application is the interface between the user and the CM Server process. The oplication includes creating windows, responding to input events, and sending commands to CM Server [5]. The CM Server receives CM data from the CM Source and sends it to the appropriate output device. The CM Server has a time-ordered play to synchronize the playing of audio and video packets [12]. It communicates with CM Source processes on the file server through inter process communication channels, and it communicates with the X server through shared memory. The system clocks on the different systems are synchronized so that actions in the CM Server and Sources can be synchronized. The CM Source processes read CM data and send it to the CM Server. CM data is sent in 8k packets on a UDP connection [5].
Rowe and Smith shows the playback application is the interface between the user and the CM Server process. The oplication includes creating windows, responding to input events, and sending commands to CM Server [5]. The CM Server receives CM data from the CM Source and sends it to the appropriate output device. The CM Server has a time-ordered play to synchronize the playing of audio and video packets [12]. It communicates with CM Source processes on the file server through inter process communication channels, and it communicates with the X server through shared memory. The system clocks on the different systems are synchronized so that actions in the CM Server and Sources can be synchronized. The CM Source processes read CM data and send it to the CM Server. CM data is sent in 8k packets on a UDP connection [5].
Selected 20 video files whose container format is flv and bit rate is 800kbps, to test multimedia synchronization performance.
Selected 20 video files whose container format is flv and bit rate is 800kbps, to test multimedia synchronization performance.
Table 1. Shows algorithm, audio and video synchronization for different approaches This paper shows different approaches for design of media player. The platform is an extension and improvement on audio/video data processing of Android multimedia player platform. Media player should consider the improvement in scenario such as decode efficiency needs to be improved, synchronization between multiple media streams, and display of the original data. Use of FFmpeg decode library seems to be an alternative method, research shows FFmpeg supports most media formats which gives a high decode efficiency.
Table 1. Shows algorithm, audio and video synchronization for different approaches This paper shows different approaches for design of media player. The platform is an extension and improvement on audio/video data processing of Android multimedia player platform. Media player should consider the improvement in scenario such as decode efficiency needs to be improved, synchronization between multiple media streams, and display of the original data. Use of FFmpeg decode library seems to be an alternative method, research shows FFmpeg supports most media formats which gives a high decode efficiency.
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