On 3/28/13 4:53 AM, Michael Heuberger wrote:
> Good to know. Thanks.
> 
> Tell me, what's the difference between a decoder and a demuxer then?

a demuxer just unpacks serialized compressed data in stand-alone units
(avpackets) providing some additional context (timestamps and such)

a decoder takes a stand-alone unit (avpackets) and decodes it to a
raw/basic representation (frames containing pixels, audio samples)

in the specific case the image2 demuxer reads from the file system and
creates an avpacket for each image file.

The png/mjpeg/tiff/etc decoder takes the avpacket and decodes it to a
frame of raw pixels.

lu
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