Well you should never rendera avi out of maya or any other 3d renderer. Theres million to one reasions for this. mopst prominent being wasete of time.
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a. your imagery rarely come out withhout problems, when they do youd wish you didnt ask avi as output. Say your render crashes midjob and its a 30 hour render then you just lost 15 hours Because deeadlines are truly DEAD lines in most places this means you just lost your commisiion entirely, or atleast are in hellofa hurry.
Had you rendered the 30 hours uncompressed frames,. youd now in case a have 50% done a 15 hours to go instead of 30 and in case b 30 minutes to go for repacking the thing maybe 2 times for different compression settings getting much nbetter quality.
b. if you expect to redner out a compressed avifile, dont (older mayas wont even give you the option, maya 8 will). Because again if ou render the sequence for 30 hours wich is not that much, now you get what you get as compression, now if its bad you nee dto rerender 30 hours again, there goes the comission once again. If you rendered uncopressed frames then the only advantage would be that you had one file not 1200, wich is NOT any less convinient btw. a being the threath.
c. no concurent render, normaly when you render out a asequence that takes 30-10000 hours (yes my average render takes 120 hours, and i do realy short stuff) you split it out to several machines at once, however teh avi packers cant work in tandem, wich means youd need to limit yourself to 1 computer or split the sequnce awkwardly and edit them together later (now sicnce you do this you could use a sequence of in dividual frames instead too since the edit app will understand this)
d. Comp, comp can in most real cases (macheines taht are designed for this that is) do faster lookups on file sequences than avifiles especialy if they are big. So the next stage of production gets faster.
e. 10 other reasons.
But yes maya does not set the speed of the avi so you need to repack it and tell your editting software to conform the framerate to 25 fps. So the whole exercice of rendering to animation is moot anyway. Nd no the player has no option for this!