[FFmpeg-devel] parser for the nellymoser decoder

Michael Niedermayer michaelni
Sun Oct 7 05:02:47 CEST 2007


On Sat, Oct 06, 2007 at 11:26:47PM +0200, Benjamin Larsson wrote:
> Hi, do I need to code a parser for the nellymoser codec when the audio
> tags only contain 1,2 or 4 64byte frames ? There is no header to find
> the only thing to use is the block_size.

well, why are 1,2 or 4 frames concatenated?

is it because of some requirement f the container? or is it arbitrary
and would any packing work if it where muxed?

would a (flv?) muxer work if it received only 4 frame packs? would it work
if it receive only 1 frames?
if these blocks ever need to be split than they definitly need to be split
in the demuxer or parser

can this packing change within a file, that is like 1,2,4,4,4,2,1,1,1 ...
or are there always the same number of frames packed together?
if it can change then they must be split in the demuxer or parser as
the alternative will make muxing in some containers much harder

if none of the above applied then its not strictly needed to spit but
its IMHO still a good idea to split them ...

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Democracy is the form of government in which you can choose your dictator
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