MKVToolNix merging with different audio sample rate

[ge0rg]

Hi,

I was hoping someone could help me.
I have 4 mkv files I would like to merge into 1 file, but when I try merging it gives me the following error "The track parameters do not match."

I assume it has something to do with 4th file as its sample rate is 22050Hz, wheres the 3 others are 24000Hz


So what is the easiest way of getting around this problem?


Thank you.
ge0rg

[Krispy Kritter]

Are all the files the same length?

Audio specs shouldn't matter, but all of the files have to be the same length (ie: runtime).

[ge0rg]

Sorry, merging was probably wrong choice of word.

I'm using the append files function.
No all 4 files are different length, I want to make one long movie out of those 4 parts, if that makes more sense?

[Selur]

So what is the easiest way of getting around this problem?

reencode the audio stream that doesn't match

[ge0rg]

Care to explain?, I know very little about encoding.

Is this the correct way of doing it?

ffmpeg -i part4.mkv -c:v copy -c:a aac -b:a 64k -ar 24000 outputPart4.mkv

Part3.mkv specs:

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : HE-AAC / LC
Codec ID                                 : A_AAC
Duration                                 : 1 h 13 min
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 kHz / 24.0 kHz
Frame rate                               : 23.438 FPS (1024 spf)
Bitrate (bs)                             : 62.71859 kbps VBR
Sample size                              : 16-bit
Compression mode                         : Lossy
Language                                 : Hungarian
Default                                  : Yes
Forced                                   : No

[sneaker]

ffmpeg's native aac encoder doesn't encode to HE-AAC. You'd need a binary that has libfdk_aac or use a different software, e.g. qaac:
ffmpeg -i part4.mkv -vn -f wav - | qaac --he --rate 48000 --no-delay - -o audio4.m4a
Then mux that audio4.m4a with video of part4.mkv and after that do all the appending.

https://trac.ffmpeg.org/wiki/Encode/AAC

[ge0rg]

I get the following error when running that command:

Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

I have installed Apple Application Support.

[El Heggunte]

I get the following error when running that command:

Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

I have installed Apple Application Support.

Have you right-clicked the installer .EXE and chosen "Run as administrator"

[ge0rg]

Its a .msi file I took from the iTunes6464Setup.exe archive

It doesn't give me an option to run it as administrator, when I right click.

[El Heggunte]

Ooops, I had completely forgotten it was an .MSI archive

Anyway, you could give a try to makeportable.zip...

https://sites.google.com/site/qaacpage/cabinet

I myself didn't use it though, I preferred to extract the required files with UniExtract — and I even had to edit the M$ .manifest file, IIRC.
Yes, it happened many moons ago...