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Open ima4 file
https://www.file-extensions.org/ima4-file-extension
The ima4 file extension is related to IMA ADPCM Apple Quicktime audio fomat. QuickTime files can store either mono or stereo IMA ADPCM data. Files with IMA data contain the codec fourcc "ima4" in the audio stsd atom. The files store the data in blocks of nibbles.
iphone - Decoding ima4 audio format - Stack Overflow
https://stackoverflow.com/questions/2130831/decoding-ima4-audio-format
The term "packet" refers to a group of compressed audio samples with a header. You need the header to decode the data immediately following. If you consider your ima4 file to be a book, then each packet is a page. At the top are the values needed to decode that page, followed by the compressed audio.
How can I transcode an IMA4 ADPCM audio file recorded …
https://stackoverflow.com/questions/1180906/how-can-i-transcode-an-ima4-adpcm-audio-file-recorded-on-the-iphone
For bandwidth reasons I would like to use Apple's implementation of the IMA4 format available for recording on the iPhone. This format is great for space, but it seems to be hard to find any programs that can transcode it into something like linear PCM or MP3.
Using Audio - Apple Developer
https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/MultimediaPG/UsingAudio/UsingAudio.html
The Basics: Audio Codecs, Supported Audio Formats, and Audio Sessions. To get oriented toward iOS audio development, it’s important to understand a few critical things about the hardware and software architecture of iOS devices—described in this section. ... (uncompressed) or IMA4 (compressed) audio.
WCM Supported Video/Audio Codec Guideline - DTRI
https://www.signage.dtri.com/support/faq/Supported_Video_Audio_Codec_Guideline.pdf
WCM Supported Video/Audio Codec Guideline Updated: Jun, 2014 File Format Supported File Extension Video Encoding Audio Encoding Remark MP4 .mp4 MPEG4 AAC, MP3 H.264 AAC, MP3 MOV .mov MPEG4 AAC, AMR Narrowband, IMA 4:1, PCM, QDesign Music2, u-law 2:1, Apple lossless, MACE3- ... IMA4-1, Linear PCM, MACE3-1, MACE6-1,QDM2, Qualcomm, U-law2-1 …
Supported QuickTime File Codecs - Autodesk
https://download.autodesk.com/us/systemdocs/help/extensions/2009/backdraft/files/WS1a9193826455f5ff1dbc298511635bea875-63e2.htm
Audio CODEC CODEC Flag Comment; IMA 4:1: ima4 Raw 8-bit audio: rawaudio Twos: twos: 16-bit PCM (Big Endian) Ulaw: ulaw Sowt: sowt: 16-bit PCM (Little Endian) A-law 2:1: alaw 16-bit PCM: in16 Linear PCM (QT 7) lpcm Ogg Vorbis (qt4l compatible) vorbis Ogg Vorbis (qtcomponents compatible) vorbis_qt MPEG-2 Layer 2 Audio: mp2 QDM2 Audio: qdm2
Supported QuickTime File Codecs - Autodesk
https://download.autodesk.com/us/systemdocs/help/2011/flame_flare/files/WS1a9193826455f5ff1dbc298511635bea875-6230.htm
Audio CODEC CODEC Flag Comment; IMA 4:1: ima4 Twos: twos: 16-bit PCM (Big Endian) Ulaw: ulaw Sowt: sowt: 16-bit PCM (Little Endian) A-law 2:1: alaw 24-bit PCM: in24 Linear PCM (QT 7) lpcm 32-bit float: fl32 MPEG-2 Layer 2 Audio: mp2
PC Audio Codecs > High Definition Audio Codecs …
https://www.realtek.com/en/component/zoo/category/pc-audio-codecs-high-definition-audio-codecs-software
PC Audio Codecs > High Definition Audio Codecs Software PC Audio Codecs > High Definition Audio Codecs Software Files Unix (Linux) Download Description Version Update Time File Size; Linux driver (3.0) It only support kernel version under 3.18. If it couldn't compile successfully, please upgrate your kernel.
OpenQuicktime - Codecs
http://openquicktime.sourceforge.net/codecs.php
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