Confirmation of encoding used in avi file

[avigonecrazy]

Hi all,

I opened a couple of avi file in wordpad and search for the word "vids"
Straight after the word "vids" is the four character code (fourcc) which identify the encoding being used. The ones that I got is mp43 which I believe is Mpeg 4 Version 3. This technique and the mp43 I read here http://www.moviecodec.com/identifycodec/avi.shtml The vidsmp43 text doesn't seems to appear at the same place in every file I open.

I have a couple of version of the mpg4c32.dll file and tried to use that to view the avi, but it didn't help. It just say can not open or module not available. The dll version that I got are 3.0xxxxxxxxx and 4.00.00.3xxx
and 4.1xxxxxxx. Tried unsuccessfully on Win 2000 because of Windows File Protection, and also no luck on NT server 4.

Could anyone shed some lights on this ?

Thanx in advance.

[KingJohn]

Don’t know what your trying to do ?. If you have the correct codec's installed, you can open up the AVI in Vdub and select File > File information

Most people just install the Nimo codec pack, and get on with things
It includes MPEG-4 V2,3,4

[avigonecrazy]

Just installed Nimo codec pack 5. Still couldn't play the avi files through
Windows Media Player. Restart pc and tried again didn't help either.

It is really weird.

[KingJohn]

In Vdub, select File > File information, What does it say ?

There are a few other codec's like DivX 5.02 and some others
Will it preview in TMPGEnc or Vdub ?

[avigonecrazy]

KingJohn,

Open the avi's in Tmpgenc said cannot open file, not supported.
Open in VirtualDub 1.4.10 got mixed result. 3 of the files get a response of "Cannot determine file type of actual_filename.ext" but 1 of them got reconstructing missing index block (aggressive mode). After that, File information shows:

Video Stream
352x288 12.5fps
decompressor: DivX MPEG-4 Low-motion
other details.....

Audio Stream
Sampling rate: 24000hz
compression Fraunhofer IIS Mpeg Layer-3 codec
and other details.....

ie the movies was split in two files. One cannot be open and the other did the reconstructing missing index block as mentioned above.
I am not keen to watch avi on computer, but interested in the techniques involved with these audio/video conversion, building up skills to do a conversion of vhs ==>vcd or svcd using avermedia studio tv tuner/capture card.

So one file I can open in virtualdub but not in Windows Media Player.

thanx for looking in this thread.

[KingJohn]

OK, well looks like one of them is corrupt, almost like a file that was only partially downloaded. You may be able to recover the missing blocks, but might loose quite a lot.

Open the file in Vdub, but on the open dialogue select "Pop up extended open options" a second window will pop up select "Re-derive keyframe flags"

Now select
Video > direct stream copy
Audio > direct stream copy

SAVE AVI

That will save out another copy with what it recovered.

As for the one that it cannot deterring file type, if you have the Nimo codec pack, that will give most of the codec's, there are a few others.

In windows > right click the files and select properties, there should be 3 TAB's and once of them shows how the file was made.

You seam to have downloaded quite a lot of difficult files, if this is your first time, then you started off badly its not always like this. Most people have all the codec's installed and so don’t have problem

Make sure the original is an AVI not a .mpg

[avigonecrazy]

Thanx KingJohn,

will check back with my friend regarding the source of these avi file
properly the other files are truly corrupted.