DGIndexed MPEG or AVI wrapped MPEG best for AVISynth?

[flywitness]

I can remux my MPEG4 into an AVI with MP4Box and FFMPEG, or I could index it with DGAVCIndex.

Then I could either do this:

AVISource("video.avi")

or this:

LoadPlugin("DGAVCDecode.dll")
AVCSource("videoindex.dga")

Whis is better for editing via AVISynth with something like Avidemux?
Does on have any advantages/disadvantages over the other?
I've heard the term "frame accuracy" mentioned before. Is one more accurate than t'other?

[jagabo]

DgAvcIndex + AvcSource() will be much more reliable. Remuxing AVC into an AVI container will cause b-frame decoder lag issues. And if the AVC has a variable frame rate you will get A/V sync problems.