Re: How to Access Media Sample Description Directly
Re: How to Access Media Sample Description Directly
- Subject: Re: How to Access Media Sample Description Directly
- From: William Stewart <email@hidden>
- Date: Mon, 24 Sep 2007 12:08:47 -0700
On 22/09/2007, at 1:08 AM, Takashi Mochizuki wrote:
Hello,
I am struggling with Movie Importer component and AudioCodec
component.
My Importer requires to pass additional infomation to AudioCodec.
If I understand you correctly, I think we normally call this a magic
cookie - its data specifically related to the audio codec being used
I want to embed special atom container inside sample description of
the audio media.
Is it available to access sample description for the Audio Media?
This is really a question for the QT API list; but in general this is
done by understanding what the official "magic cookie" information is
for that format, and then how this would be stored in a movie (or
other file type)
In case of video codec, I can embed special ImageDescription
Extension inside
ImageDescription(SampleDescription);
So that my video codec can receive additional information from
importer component.
But from AudioCodec point of view, it seems that AC does not allow
direct access
to sample description atom of Media inside Movie.
Yes - this is a QT file concept. Audio codecs deal with the basic
information they need:
What is the exact format (AudioStreamBasicDescription)
Audio Codec specific information (if any) (magic cookie)
If surround - what is the meaning/order of the channels
(AudioChannelLayout)
Bill
Any suggestion please, if I could?
Takashi Mochizuki
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