Errors compressing Audio using VirtualDub

[Shockro]

I'm a first time poster here, and I'd appreciate it if anyone could give me their two cents on this issue I'm having, I'm new to this sort of thing so if you could bear with me I'd greatly appreciate it.


I have a video I'm basically just straight up compressing, the video compresses to divx just fine, but the audio wont compress to any format whatsoever. Whenever I choose a format to convert to, no matter what I convert to, whether it be the windows installed MP3 or Lame AMC, it gives me the error:

"Error initializing audio stream compression:

The audio codec cannot compress the source to the desired format.
Check that the sampling rate and number of channels in the source is compatible with the selected compressed audio format"

The audio of the file in question is 6 ch., 48Khz and at a whopping 4608kbps, so you can imagine why compression is a thing I want here. But no matter which compression format I choose, even 48Khz ones, no dice.

If I attempt to convert the audio directly to another sampling rate, precision, or amount of channels, I get a different error:

"Cannot convert audio: the source channel count is not supported (must be mono or stereo)."

Despite this fact, even when I select specifically stereo or mono, I get this error.

Any help at all would be greatly appreciated, thank you very much in advance.

[poisondeathray]

With the file loaded in vdub, what does file=>file information show ?

If I attempt to convert the audio directly to another sampling rate, precision, or amount of channels, I get a different error:

"Cannot convert audio: the source channel count is not supported (must be mono or stereo)."

Despite this fact, even when I select specifically stereo or mono, I get this error.

How did you do the conversion? The sampling rate and downmix to stereo ? In vdub? audio=>conversion ? or another program ?

[poisondeathray]

Besides the conversion issue, did you consider using 6ch AC3 ?

448kbps will be significantly smaller, but still sound fairly good and you get to keep 6ch, and has high compatibility

[Shockro]

This is the information that virtualdub has on the file.

I attempted 6channel compression with AC3 and got the first error in my original post again. Also I am indeed using Virtualdub to convert the file, which is what give me the "Cannot convert audio: the source channel count is not supported (must be mono or stereo)." This error is happening if I change /any/ of the options, alone or together, that are provided in Audio -> Conversion... in Virtual dub.

[jagabo]

I think VirtualDub only supports mono and stereo audio in full processing mode. You'll have to downmix to stereo before giving the audio to VirtualDub or use some other audio software to compress the audio, then import it into VirtualDub in direct stream copy mode.

[Shockro]

Yeah, it seems like even when I just allow it to not process the audio from the original video, it becomes extremely chipmunk-ish and crams the entire audio stream into the first few minutes. So even if I ignore the audio and compress only the video, I have this issue.

What program would you recommend, jagabo? I just attempted to do it with Avidemux, but even though it says it works, the video always comes out in 6ch again, even if it says it will change to mono or stereo.