AAC: AAC stands for Advanced Audio Coding, and it was designed to be the successor of MP3. As you would guess, it compresses the original sound, resulting in disk savings but lower quality. As you would guess, it compresses the original sound, resulting in disk savings but lower quality.Need to devfile(. mp4 format with H264 encode format). 2. if videos file ( any format) must be converted to. mp4 encoded in H264 format with constant quality for the video component and AAC format for the audio component. 3. ios pcm to aac
Demonstrates using the Audio Converter APIs to convert from a PCM audio format to a compressed format including AAC. All the relevant audio specific code is in the file Also see the companion to this sample
Join GitHub today. GitHub is home to over 28 million developers working together to host and review code, manage projects, and build software together. I need to convert a linear PCM recorded audio file to AAC format and its working fine too. But in simulator it takes less than 2 Sec but in iPhone4 it is 33Sec and in iPhone 4S it is 51 sec. Its a 6 min audio file.ios pcm to aac Samples iOS Media Audio Converter File Converter Demo This sample demonstrates the use of the Audio Converter API to convert from a PCM audio format in an AIF file to a compressed format in a CAF file and will support AAC encode on appropriate hardware such as the iPhone 3GS.
Easy AAC compressed audio conversion on iOS By Michael Tyson Published: April 2, 2011 From the iPhone 3Gs up, its possible to encode compressed AAC ios pcm to aac May 26, 2011 Description. This is a simple voice recorder. It records by high quality(PCMWAVE) and AAC. Records in 8000, , , , and Hz 16bits Mono. I choose The AAC format as there is an article from Fraunhofer called AACELD based Audio Communication on iOS A Developers Guide . The sample code works great. The audio is recorded in LPCM format and encoded to AACELD and decoded back to LPCM and finally performed playback immediately, but it's AACELD(Enhanced Low Delay)