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Answer by StefanB for mp4 atom - How to discriminate the audio codec? Is it...
The field splitting in the answer from Andy Henson is wrong, the '0x80' bytes are not part of the tag, but part of the lenght and form a Varint32 length.00000033 65736473 = ISO Atom "esds" of length...
View ArticleAnswer by Andy Henson for mp4 atom - How to discriminate the audio codec? Is...
The format of the esds atom [1] is defined as:Size 32-bitType 32-bit 'esds'Version: 8-bit, zero.Flags: 24-bit field, zero.Elementary Stream DescriptorThe Elementary Stream Descriptor is defined in the...
View ArticleAnswer by AlexC for mp4 atom - How to discriminate the audio codec? Is it AAC...
In the 'esds' atom there are a few fields relevant to determining the codec. The first byte of content of the esds atom is the objectTypeIndication (that's the 11th byte from your solution). This field...
View Articlemp4 atom - How to discriminate the audio codec? Is it AAC or MP3?
I'm working on a mp4 container parser but I'm going crazy trying to recognize the audio codecs of the streams.I used both QtAtomViewer and AtomicParsley but when I find the...
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