See copyright notice PNG and ZLib included in this directory. 

PNG streams are defined in the following way:
- No decoder specific configuration
- StreamType is visual
- ObjectTypeIndication is 0x6d

To produce MPEG-4 content using PNG with Mux or MP4Enc tools, set the 
	muxInfo.streamFormat = JPEG 
of the desired stream in the script file and specify an ObjectTypeIndication of 0x6C. 

Multiple PNG files cannot be concatenated into a single stream.
