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View Full Version : Is DivX5 really MPEG-4 ISO compliant?


dRD
7th March 2002, 17:41
Ok, you can finally change your AVIs to use MPEG-4 structure instead, but how about the actual encoding? Is it truly ISO MPEG-4 specs compliant?

I've ran few tests, encoded stuff with DivX5, converted them to MPEG-4 structure, etc and none of the clips plays with video players supposed to handle MPEG-4 ISO video correctly (without using system codecs, obviously) -- one of the players I tested was from Philips and it worked nicely with all the test MPEG-4 clips from various sites, but none of the DivX5 clips worked.

So, does this mean that now we have some ***ppy almost-compliant video format using .mp4 extension and making people to think that those work with any MPEG-4 decoder or did someone actually got it working?

Thing is really that DivX needs to be standard-compliant in order to get into big boys' games -- Real and MS can afford to play with their propietary hacks, but others can't.

dRD
7th March 2002, 18:00
Blah, I decided to try it one more time, tweaking the CLI MPEG-4 settings as long as I achieve something that MPEG-4 players can play and Simple Profile seemed to do it. Weird, since Philips player says it support Advanced Simple Profile, but still the ASP-encoded DivX5 clips didn't play with it. Maybe it's just a bug or feature yet-to-be-implemented in Philips' player or something.

tripnotik
7th March 2002, 18:01
It has been discussed on the divx forum. Go look here:
http://www.divx.com/forums/viewtopic.php?topic=28129&forum=5

Basically, it seems that it's really ISO MPEG-4 compliant, and that the philips player is not very good.