dynamic aspect ratio

[daWsOn_s]

is it possible to apply different flags for aspect ratio for a mp4 file with mpeg-4 avc video stream like mpeg-2?

[VFR maniac]

Probably, yes.
x264 Patch is here (http://mailman.videolan.org/pipermail/x264-devel/2009-January/005459.html).

However, I don't know yet any players, decoders or splitters which support it.

[daWsOn_s]

I don't get what to do, anyway i don't think it's out standard, I'm sure TV SD broadcaster which use h.264 change aspect ratio

[Comatose]

I think you can achieve this using ordered chapters in MKV.

[daWsOn_s]

How? Mkvmerge?

[Comatose]

...with ordered chapters. Google it.