[M4IF Technotes] Ques on frequency of visual_sequence

[Gaurav Aggarwal]

Dear all,
Would you know about typical frequency at which an encoder
would insert the visual_sequence start code in the stream? 
In mpeg-2 decoders, one could safely start decoding from a 
sequence_header and discard any pictures before a seq_hdr comes.
Or at least thats what we did (do you guys feel otherwise).
Can we do the same, or should we just wait for a Visual_object
or a video_object_layer? We need the aspect_ratio, frame_size
and chroma_format etc. for starting our SP/ASP decoder.
Thanks much!
Gaurav
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