What GUID(s) / wFormat tag(s) is AAC officially using ?

Ramirez: jcsston just told me that he had the same problem, and in his case it was solved be removing any old cygwin1.dll and cygiconv-2.dll he had lying around somewhere else, e.g. c:\windows\system32. Maybe you can try to see if you have older versions and temporarily move them out of harm's way.

Nope,there is no other dlls; they all located in c:\mkvtool dir. I used the following command line argument (All source files located in the same dir) mkvmerge.exe -o output.mkv -A video.avi audio.aac is the sample clip (Only 2 transfers per hour allowed, geocities sux! If you won't be able to D/L this file, I'll send it directly to your email later on)

I get a similar problem as ramirez is getting. Here is what it says: C:\Program Files\Matroska>mkvmerge -o "c:\signs.mkv" -A "C:\Signs\Video_TS\Signstest.avi" "C:\Signs\Video_TS\Signs.aac" Using AVI demultiplexer for C:\Signs\Video_TS\Signstest.avi. Opening file. This may take some time depending on the file's size. +-> Using video output module for video stream. Using AAC demultiplexer for C:\Signs\Video_TS\Signs.aac. +-> Using AAC output module for audio stream. I have cut a small part of the avi like you suggested to ramirez, if you would like me to cut some of the aac I can do that as well. The aac was created in Nero, I think this may also be a problem. What have you guys been using to test this? I think the headers are a little different in Nero as opposed to PysTEL so this may cause problems, anyhow let me know if you want a sample of the audio. The video you can download here, I am going to try to mux it into a mp4 and play it to see if that works latter today. Please people don't download the file since geocities sucks so much and then the people who might be able to fix this will not be able to get the file. And thank you all for making this aac directshow filter a possibility, everyone around here knows I have been bugging people about making this for a while now, thanks for listening. :) EDIT: Oh I saw that mosu posted the version that they want to be spread not the one I got, so I can try that and post back for that too. Oh yeah, I forgot to say what the actual problem was :rolleyes: when it outputs these messages it just hangs, and uses 100% cpu, but does nothing. It isn't that I am impatient I left it doing this all last night, ;)

I just tried that new build (0.4.0) nothing changed. @Bonz1 How exactly you're cutting AAC stream?

Easy, besplit, read the docs that come with it for more info, ;). EDIT: Ok, a cut some of the aac encoded in Nero, it is definitely causing the problem with mkvmerge, I used PysTEL with the same switches etc and it works. So here is the audio encoded with Nero. Nero outputs a mp4 file so you have to extract it too so this could be what is causing the problem as well, but anyhow here it is,