Captured HDV file.....why does renaming m2t file to mpeg work?

[Rudyard]

I have the sony HDR HC3 and have transfered some footage using HDVSPLIT which i read about in another thread and the resulting file is an M2T file which nothing but VLC opens but doesnt play all that great (suffers from what looks to be interlaced problems when fast moving things happen).

So reading another thread again, changing the extention from M2T to MPEG means the file can be opened by WMP (and I assume other software) which plays it back flawlessly.

How can changing an extention work for starters (I assume it would be M2T for a reason?) and why doesnt it just come out as an MPEG file rather than M2T if it is more common to play?

Also does it make a difference if i call it MPEG or MPG??

[bobkart]

You can turn on one of many deinterlacing processes, although it's not going to help the stuttering, only make it worse with more being asked of the CPU.

I am still learning about the difference between MPEG Transport Stream and just MPEG files. But apparently WMP can play them both. And it just needs to be able to recognize the filename extension to play it (*.MPG). It might even work it you added *.M2T to the list of filename extensions that are to be opened with WMP.

*.MPG and *.MPEG extensions should both make it work assuming they are both opened by WMP. But I assume it's possible to change just one of them to be opened by a different application, in which case renaming the file to that extension would make it open with the other application instead.

Also, not to hijack your Topic but I've been trying to find M2T file format specifications, with no luck so far. So if anyone can direct me to some, I'd appreciate it.

[AlanHK]

changing the extention from M2T to MPEG means the file can be opened by WMP (and I assume other software) which plays it back flawlessly.

How can changing an extention work for starters (I assume it would be M2T for a reason?) and why doesnt it just come out as an MPEG file rather than M2T if it is more common to play?

Changing the extension only tells Windows what app to use when you click on it. WMP could probably open it under the original name if you did file/open/all files and selected it.

Use GSpot and see what kind of file it thinks it is.

[Rudyard]

Ah....so file extentions are pureley for windows to associate it with a program? Not actually part of the file/data needs for it to run?

[bobkart]

Pretty much.

[AlanHK]

Ah....so file extentions are pureley for windows to associate it with a program? Not actually part of the file/data needs for it to run?

Yes. Though some programs refuse to open a file if it has the "wrong" extension.

Again, get GSpot which will analyse the actual data in the file and (try to ) tell you what it is.

[Rudyard]

I have Gspot....(S) --> MainConcept MPEG Splitter --> InterVideo Video Decoder --> Overlay Mixer2 --> (R) is what is says, at the top it says its not an avi file (which I know)

Avi codec says invalid something when loading.

Anyhow, I know the file as it came off my HDV camera, its not an unknown like a download.