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  2. Apple Lossless Audio Codec - Wikipedia

    en.wikipedia.org/wiki/Apple_Lossless_Audio_Codec

    The data compression software for encoding into ALAC files, Apple Lossless Encoder, was introduced into the Mac OS X Core Audio framework on April 28, 2004, together with the QuickTime 6.5.1 update, thus making it available in iTunes since version 4.5 and above, and its replacement, the Music application. [8]

  3. QuickTime - Wikipedia

    en.wikipedia.org/wiki/QuickTime

    By 2000, MPEG-4 formats became industry standards, first appearing with support in QuickTime 6 in 2002. Accordingly, the MPEG-4 container is designed to capture, edit, archive, and distribute media, unlike the simple file-as-stream approach of MPEG-1 and MPEG-2. [37]

  4. QuickTime File Format - Wikipedia

    en.wikipedia.org/wiki/QuickTime_File_Format

    In QuickTime Pro's MPEG-4 Export dialog, an option called "Passthrough" allows a clean export to MP4 without affecting the audio or video streams. One discrepancy ushered in by QuickTime 7 released on April 29, 2005, is that the QuickTime file format supports multichannel audio (used, for example, in the high-definition trailers on Apple's site ...

  5. MP4 file format - Wikipedia

    en.wikipedia.org/wiki/MP4_file_format

    MPEG-4 files with audio and video generally use the standard .mp4 extension. Audio-only MPEG-4 files generally have a .m4a extension. This is especially true of unprotected content. MPEG-4 files with audio streams encrypted by FairPlay digital rights management as were sold through the iTunes Store use the .m4p extension.

  6. Comparison of audio coding formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_audio_coding...

    Yes: only in MPEG-4 Part 12 container: Yes: only in MPEG-4 Part 12 container: G.721: ADPCM, Lossy: 8 kHz 32 kbit/s 13 bit Yes No No No G.722: sub-band ADPCM, Lossy: 16 kHz 64 kbit/s (comprises 48, 56 or 64 kbit/s audio and 16, 8 or 0 kbit/s auxiliary data) 14 bit 4 ms Yes No No No G.722.1: Modulated Lapped Transform (MDCT), Lossy (based on ...

  7. MPEG-4 - Wikipedia

    en.wikipedia.org/wiki/MPEG-4

    MPEG-4 is a group of international standards for the compression of digital audio and visual data, multimedia systems, and file storage formats. It was originally introduced in late 1998 as a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group (MPEG) (ISO/IEC JTC 1/SC29/WG11) under the formal standard ISO/IEC 14496 – Coding ...

  8. Video file format - Wikipedia

    en.wikipedia.org/wiki/Video_file_format

    Made for VivoActive Player: Advanced Systems Format (ASF) .asf ASF: any any AMV video format.amv Modified version of AVI [4] Variant of Motion JPEG: Variant of IMA, ADPCM Proprietary video file format produced for MP4 players and S1 MP3 players with video playback MPEG-4 Part 14 (MP4) .mp4, .m4p (with DRM), .m4v MPEG-4 Part 12

  9. H.264/MPEG-4 AVC products and implementations - Wikipedia

    en.wikipedia.org/wiki/H.264/MPEG-4_AVC_products...

    Includes an MPEG-4 file source to read MP4, M4A, M4V, MP4V, MOV and 3GP container formats [8] and an MPEG-4 file sink to output to MP4 format . [9] On2 Technologies provides software implementations of an H.264 Baseline encoder and decoder in its embedded (Hantro) product family. The codec is available optimized for ARM9, ARM11 and Cortex A8.

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