[Ffmpeg-devel] Re: [PATCH] mov fourccs for handling FCP files

Mike Melanson mike
Wed Feb 15 20:23:40 CET 2006

Roberto Togni wrote:
> A sample for fl32 with enda atom is here
> http://equinox.campus.ltu.se/samples/A-codecs/qtfl32/vb3.mov
> MPlayer plays it as be float 32bit. I had no idea about the enda atom
> when i added support for it, so i just considered all fl32 samples to be
> be.

	What I've always wondered about PCM is the range. What is the range of 
the samples? -32768.0 -> 32767.0? -1.0 -> 1.0?

> These files also seems to have an enda atom, but being mp3 i don't know
> what's the meaning of it
> http://equinox.campus.ltu.se/samples/mov/qtaudio/surge-2-16-B-.mp3.mov
> http://equinox.campus.ltu.se/samples/mov/qtaudio/surge-2-16-B-ms55.mov

	The 'B' or 'L' in the surge audio samples denotes that the decoded 
16-bit PCM data is in either big or little endian format ... hmm, you're 
right, that doesn't make much sense in this context.

	-Mike Melanson

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