MP4 -> Lossless/3ivX AVI formats?

Taruto! · Post by **Taruto!** » Tue Jun 26, 2007 1:34 pm

Okay, putting things simply: I need a good program that can convert MP4s into either lossless AVI or 3ivX AVI formats.

I've never worked with MP4s before and don't intend using them too much (not while .avis are still accepted, anyway), but after being given some RAWs in .MP4 format I'm guessing I need to learn about them somehow anyway. They barely run on my computer so I've just avoided them until now.
I've looked around for one in both this subforum and outside a-m-v.org and I haven't found any good programs that can convert MP4s - at least, not to lossless formats or 3ivX coded .avis.

I'm such a newbie to MP4s (and encoding in general, to be honest) so I'm sorry if I've left out any important information! But if anyone can help me with a decent program/some suggestions, I'd really appreciate it!

Minion · Post by **Minion** » Tue Jun 26, 2007 1:37 pm

directshowsource("file.mp4")

Qyot27 · Post by **Qyot27** » Tue Jun 26, 2007 2:09 pm

I'm assuming you're referring specifically to MP4s that use H.264, in which case the DirectShowSource route is currently the best way (at least until DGAVCDec/DGAVCIndex can accept more than just raw streams). You might need to use the fps and convertfps parameters, though, just in case you experience any desync - this obviously only applies when audio needs to be retained. You might need to use Trim() to get any grey frames at the end of the video taken out.

If it's actually ASP (i.e. DivX or XviD) in MP4, then you can use MP4Box - or YAMB, if you prefer to do it through a GUI - to transmux it directly to AVI without reencoding.

YouTube · Post by **Kionon** » Wed Jun 27, 2007 7:35 pm

I will warn, and someone more experienced than me (hint, hint Zero1) should be able to back me up here that there are issues with directshowsource being frame accurate at times. It's not an "ideal" solution.

If I'm wrong correct me.

Qyot27 · Post by **Qyot27** » Wed Jun 27, 2007 8:16 pm

Kionon wrote:I will warn, and someone more experienced than me (hint, hint Zero1) should be able to back me up here that there are issues with directshowsource being frame accurate at times. It's not an "ideal" solution.

If I'm wrong correct me.

That is true. However, if you're converting it to Lossless I don't think it's an issue - it only would be if you still tried to serve it through the editing program with AviSynth.

As I previously mentioned, DGAVCDec might be more accurate (although it still suffers from the same grey frames problem that DirectShowSource exhibits), but it's still much more cumbersome to use at the moment because it only supports raw streams. Once it becomes mature, then that would definitely be the method to use.

CodeZTM · Post by **CodeZTM** » Wed Jun 27, 2007 8:21 pm

MediaCoder. Beautiful convertor.

Taruto! · Post by **Taruto!** » Thu Jun 28, 2007 9:59 am

Thank you all for your input! I experimented with the ways suggested, but found MediaCoder to be incredibly easy to use so I'll be sticking with that for now