WebM to AAC
Convert WebM to AAC, WebM to AAC Converter
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WebM to AAC Software converts WebM to AAC easily. With a simple and user-friendly interface, you could convert WebM to AAC as easy as 1-2-3. The WebM to AAC Converter Software also supports other common audio formats such as MP3, M4A, OGG, WMA, etc. And it could convert files in batch.
WebM to AAC Software works on all Windows versions including Vista and Windows 7 (both 32-bit and 64-bit editions).
Instructions to Convert WebM to AAC:
Click "Add Files" button to choose WebM files and add them to conversion list.
Choose one or more WebM files you want to convert and then click Open.
Choose "to AAC" at "Output Format" combo-box.
Click "Convert" to convert WebM files to AAC format.
The software is converting WebM files to AAC format.
When conversion completes, you can right-click converted WebM file and choose "Play Destination" to play the outputted AAC file; or choose "Browse Destination Folder" to open Windows Explorer to locate the outputted AAC file.
What is WebM?
A WebM file consists of VP8 video and Vorbis audio streams, in a container based on a profile of Matroska. The project releases WebM related software under a BSD license and all users are granted a worldwide, non-exclusive, no-charge, royalty-free patent license. Despite this, concerns have surfaced over potential for infringement on existing patents and some in the industry have called upon Google to provide indemnification against patent suits.
Support by Mozilla Firefox, Opera, and Google Chrome was announced at the 2010 Google I/O conference. Internet Explorer 9 will also be able to support WebM files if the VP8 codec is installed locally. Safari on the desktop supports any codec installed in QuickTime, allowing future WebM playback using QuickTime codec components such as Perian. Epiphany also supports WebM through the GStreamer multimedia framework.
YouTube now offers WebM videos as part of its HTML5 player experiment. All uploaded files with resolutions from 720p and above are encoded to WebM in 480p and 720p, and other resolutions will follow. YouTube has committed to encode their entire portfolio of videos to WebM.
What is AAC?
AAC has been standardized by ISO and IEC, as part of the MPEG-2 & MPEG-4 specifications. The MPEG-2 standard contains several audio coding methods, including the MP3 coding scheme. AAC is able to include 48 full-bandwidth (up to 96 kHz) audio channels in one stream plus 15 low frequency enhancement (LFE, limited to 120 Hz) channels and up to 15 data streams. AAC is able to achieve indistinguishable audio quality at data rates of 320 kbit/s (64kbit/s/channel) for five channels. The quality is close to CD also at 96 kbit/s (48kbit/s/channel) for stereo.
AAC supports inclusion of 48 full-bandwidth (up to 96 kHz) audio channels in one stream plus 16 low frequency effects (LFE, limited to 120 Hz) channels, up to 16 "coupling" or dialog channels, and up to 16 data streams. The quality for stereo is satisfactory to modest requirements at 96 kbit/s in joint stereo mode; however, hi-fi transparency demands data rates of at least 128 kbit/s (VBR). The MPEG-2 audio tests showed that AAC meets the requirements referred to as "transparent" for the ITU at 128 kbit/s for stereo, and 320 kbit/s for 5.1 audio.
AAC is also the default or standard audio format for iPhone, iPod, iPad, Nintendo DSi, iTunes, DivX Plus Web Player and PlayStation 3. It is supported on PlayStation Portable, Wii (with the Photo Channel 1.1 update installed for Wii consoles purchased before late 2007), Sony Walkman MP3 series and later, mobile phones made by Sony Ericsson and Nokia and Android-based mobile phones.
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