3gpp to wav

Video is an important part of Multimedia Systems in computers. To meet the needs of video storage, people have set different video file formats to put the video and audio in one file for simultaneous playback. Video files are actually a container that contains different tracks. The Container formats used are related to the scalability of video files. FourCC is the Four-Character Codes. It consists of 4 characters (4 bytes) and is a Four-byte format that uniquely identifies the video data stream,

) MP3 • Single-channel or stereo 8-kbps fixed (CBR) or variable (VBR) playback rate Mp3(metadata) MIDI • MIDI types 0 and 1. DLS versions 1 and 2. XMF and mobile XMF. Supported ringtone formats: RTTTL/RTX, OTA, and iMelody 1. Type 0 and 1 (. mid, xmf, mxmf) 2. RTTTL/RTX (. rtttl, rtx) 3. OTA (. ota) 4. iMelody (. imy) Vorbis • 1. Ogg(.ogg) 2. Matroska(.mkv, Android4.0 +) PCM/WAVE • 8-

("APPLICATION/X-SV4CRC", "SV4CRC"); Smimetypemap.loadentry ("Application/x-tar", "tar"); Smimetypemap.loadentry ("Application/x-texinfo", "Texinfo"); Smimetypemap.loadentry ("Application/x-texinfo", "Texi"); Smimetypemap.loadentry ("Application/x-troff", "T"); Smimetypemap.loadentry ("Application/x-troff", "Roff"); Smimetypemap. Loadentry ("Application/x-troff-man", "man"); Smimetypemap.loadentry ("Application/x-ustar", "Ustar"); Smimetypemap.loadentry ("Application/

1.2.1 Common formatsCommon audio formats are: CD format, WAVE (*. WAV), AIFF, AU, MP3, MIDI, WMA, RealAudio, VQF, Oggvorbis,AAC, APE. CDThe audio quality of the CD format is relatively high. So to speak the audio format, CD is naturally the leading pioneer. In most playback software, the "hitOpen file Type ", you can see the *.CDA format, which is the CD track. Standard CD format is 44.1K sampling frequency, rate 88k/Seconds, the 16-bit quantization b

(metadata) MIDI • MIDI Type 0 and 1. DLS version 1 and 2. xmf and mobile xmf. Supported ringtone formats: rtttl/RTx, OTA, and imelody • Type 0 and 1 (. mid,. xmf,. mxmf)• Rtttl/RTx (. rtttl,. RTX)• OTA (. OTA)• Imelody (. IMy) Vorbis • • Ogg (.ogg)• Matroska (.mkv, Android 4.0 +) PCM/wave • 8-and 16-bit linear PCM (hardware restrictions on rates) Wave (.wav) Image JPEG

. audio and video file formatsFirst, we need to identify the differences between media files and encoding: files are a collection of videos, audio, scripts, and containers; the compression algorithm of the video and audio in the file is the specific encoding. * AviAudio/Video interaction storage, the most common audio/video container. The most supported video and audio encoding is supported.* MPGThe audio and video containers used by MPEG encoding have the characteristics of stream. PS is classi

Directory List all files and specific subdirectories (if the subdirectory contains a. nomedia hidden file, it will not be listed .). The listed file is used to determine whether the file is supported based on the file extension. If this file extension is supported, the C ++ layer calls back to the Java layer to scan the file. This extension will be scanned and listed in mediafile. java. The following is a list of supported file extensions. /* Audio */Addfiletype ("MP3", file_type_mp3, "audio/MP

request, our service will start. However, it takes a long time to scan files. Therefore, this is an asynchronous process. There is a scanner, and there are two scanning points: External Storage {Tagshow (Event)} "> Device and/root/media./* Audio */Addfiletype ("MP3", file_type_mp3, "audio/MPEG ");Addfiletype ("m4a", file_type_m4a, "audio/MP4 ");Addfiletype ("WAV", file_type_wav, "audio/X-WAV ");Addfiletype

/vnd.symbian.install. Sisx Ibid. apk,mime to Application/vnd.android.package-archiveIn addition, you can also set up: The download type WAP server--------------------------------. MMF AUDIO/MMF. MFM AUDIO/MFM. PMD AUDIO/PMD. ADP AUDIO/ADP. AMR Audio/amr. PMDAUDIO/PMD.3gp VIDEO/3GPP. cab Application/vnd.smartpohone. gif image/gif. Hme Application/vnd.smartphone.thm. jad Text/vnd.sun.j2me.app-descriptor. Jar Application/java-archive. jpg Image/jpeg. Mid

Get, HTTP, 1.1Connection: keep-aliveHOST: nt.pvp.cnAccept: Application/X-mbook-kcome-UMD, application/vnd. byread. BRM, audio/WAV, AuDio/X-WAV, audio/basic, audio/X-Au, audio/Au, audio/X-basic, video/MP4, video/MPEg4, video/3GPP, application/vnd. Rn-RealMedia, audio/AMR-WB, audio/AMR, audio/MP3, application/SDP, audio/SP-Midi, audio/X-beatnik-RMF, audio/Midi, aud

Here's a look at what the ANDRIOD Multimedia framework supports developers. 1. Mediascannerreceiver This broadcast recipient receives action_boot_completed, action_media_mounted, or Action_media_scanner_scan_ File broadcast when the image, music and video files in the SD card is scanned, because the scan does not affect the user's use, here started a service Mediascannerservice, scan the following file types:/* Audio */addfiletype ("MP 3 ", File_type_mp3," audio/mpeg ");Addfiletype ("M4A", file_

.264. Therefore, the idea of developing a player on Symbian is as follows: 1) Call the interface provided by Symbian: You can directly use the cvideoplayerutility class for video playback. The formats supported by RealPlayer are as follows. Including 3GPP streaming media playback;For audio playback, cmdaaudioplayerutility can be used for local playback, while cmdaaudiooutputstream can be used for stream playback, while mmfcodec decoding efficiency is

(siren7), g.723.1, g.726, g.728, g.729a;Stereo codec (L16 );Wav file playback, streaming media and recording;Supports the RTCP protocol;Call quality monitoring;RFC 2833;Automatic response, automatic playback of files, automatic cycle of RTP;Generate sound;AEC (accoustic echo cancellation );Adaptive jitter buffer;Adaptive mute detection;PLC (package loss and hiding );Packet loss simulation;Each RTP packet contains multiple frames;Support for SRTP (sec

323 H.323 Internet telephone service text/h323 386 Virtual Device Driver 3GP 3GPP video/3gpp editing 669 Winamp media files 7Z WinRAR compressed file AAC Winamp media files ABS File AC3 AC3 File ACA Microsoft Agent Character File (HTTP format) ACE WinRAR compressed file ACF Microsoft Agent Character File (HTTP format) ACL automatically corrects List Files ACS Microsoft Agent Character File ACW File ADE Micr

Windows File Format Daquan 323 H.323 Internet telephone service text/h323 386 Virtual Device Driver 3GP 3GPP video/3GPP editing 669 Winamp media files 7z WinRAR compressed file AAC Winamp media files ABS File AC3 AC3 File ACA Microsoft Agent character file (HTTP format) Ace WinRAR compressed file ACF Microsoft Agent character file (HTTP format) ACL automatically corrects List Files ACS Microsoft Agent chara

Development Environment: Windows 7 FFmpeg versions: 0.8 Dynamic Link Library in FFMPEG windows: Http://url.cn/IJJwo3 For the FFMPEG version, it should be noted that many interfaces of the old version have been deprecated in the new version, and my program is in just for the FFmpeg-0.8 version. Supported audio formats:Currently, the test program supports the conversion of AMR, WAV (codecid: gsm_ms), WAV (PC

/*** The WAV file is decoded using transcode-1.1.7 and then played using OpenSL ES**/Variables and structures usedWAV wav;//wav file PointerSLOBJECTITF Engineobject;//Engine ObjectSLENGINEITF Engineinterface;//Engine interfaceSLOBJECTITF Outputmixobject;//MixerSLOBJECTITF Audioplayerobject;//Player ObjectSLANDROIDSIMPLEBUFFERQUEUEITF ANDIOPLAYERBUFFERQUEUEITF;//B

corresponding types: types {Application/atom+xml atom; Application/dart Dart; Application/gzip GZ; application/java-archive jar War Ear; Application/javascript JS Jsonp; Application/json JSON; Application/owl+xml Owl owx; Application/pdf PDF; Application/postscript AI EPS PS; Application/rdf+xml RDF; Application/rss+xml RSS; Application/vnd.ms-fontobject EoT; Application/x-7z-compressed 7z; Application/x-bittorrent torrent; Application/x

video container format (I .e. video MPEG-2, AC3 or DTS for audio), supports multi-video, multi-track, multi-subtitle chapter, etc. MP4 MPEG-4 coding uses the audio and video container, developed based on QuickTime mov, has many advanced features. 3GP The 3GPP video format is mainly used for streaming media transmission. ASF The audio and video containers used by Windows Media can be used for stream transmission and include scripts. Rm The audio and v

AMR (full name is Adaptibve multi-rate) is an audio format. Mainly used for mobile device audio, compression is larger, but compared to other compression format quality is poor, because more for the voice, call, the effect is very good. At present, the AMR format appears to be more of Nokia, Sony Ericsson system of some mobile phones. The following is a small series of methods to open the AMR file. 　　What is the AMR file? AMR (full name is Adaptibve multi-rate), in addition to Noki