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io18 3rd November 2003 12:40 PM

Unknown file format (RV40)

I just discovered this forum and I search some help in resolving a problem (don't think it's a bug) on bsplayer :

I'm trying to read .mkv files on bsplayer, but the following message keep on appearing : "Unknown file format (RV40)"

I've put the codecs used on Windows media player (on which .mkv files are working but not well) in the file "plugins", but BS doesn't detect 'em.

What's up doc.

adicoto 3rd November 2003 01:49 PM

It is Real Player format.

Maybe this link will help you. I am not sure cause I haven't tested it yet.

io18 3rd November 2003 06:01 PM

The problem (I think) is that I don't know how to install the codecs I already have (before I put them in the plugins file of win media player, WMP keep on displaying the same message).

Is there another way to install the codecs than simply put em in plugins file ?

Quietseb 3rd November 2003 06:51 PM

don't you have any executable or .inf file among your files ?
if you have a .inf, right-click it and select 'install' in the context menu
if you have a .ax file, you can try to copy it to your windows\system32 directory and then start-->run , type
Code: your_ax_file
if you have neither of those, maybe you could give us a description of those codec files (where did you got them etc) and a list of these files

io18 3rd November 2003 08:29 PM

Thank you for your answers

I've tried the two of your profositions :
- I haven't .inf file in my directory, so I can't work it that way ;
- The only .ax file I can remember is the file, and the start-and-run method you've told me neither work (file does not exist (?)) ;

I've found the codecs (.dll) I use at the same adress adicoto gave me, I've dowloaded the rp9win32codecs, and put them in the WMP general file. So i'm able to watch th film (.mkv) but the image keep on stoping every 3 seconds (and so it's vry boring to watch !!!). I've decided to use bsplayer as this kind of problem is often solved with your program.

Here is the list of codecs which are in the plugins file of bs player (and the same in WMP file) :


and that's all. Anyway thank u for your help, I will try again and tell you if itr works.


bond 4th November 2003 08:44 AM

rv40 = realvideo9

to play it back you need two things:
1) install realone player (i dont know if it works with codec packs)
2) install the realmedia splitter from gabest:

adicoto 7th November 2003 03:25 PM

Problem solved.
Real Player codecs:

First file is an archive. dlls from inside must be copyed in windows\system32 folder.
Second file is an archive. ax file from inside must be registered.

Tested and working ok.

io18 20th November 2003 12:40 PM


I've been away for a while and I didn't have time to deal with my MKV files problems.

So I'm back and I've tried to read a .mkv film on bsplayer after copying the codecs you've given me. And it works !!! But, there's still a problem of synchronisation between image and sound and it's probably due to the fact that I don't know how to register the .ax files.

Any answer for this or there is a problem with my file ? with my computer (processor not strong enough 1Ghz) ? both ?

After that I'll stop bothering you with my problems.

Thanks in advance, Io.

bond 20th November 2003 01:09 PM

when you have sync issues because of choppy video playback, thats because of a weak cpu -> you need a player that allows using "overlay mixer" i think that bsplayer 1.0 already incorporates this feature (tough i didnt test it till now)

io18 20th November 2003 01:21 PM

BSplayer 1.0
Has this been released ???

It would be a huge news !

So, I ususally deal with sync pbs with playing on bsp, but this time it's not enough... that's a pity !

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