[Help] Batch File Remux MKVs into MP4s? (Windows 8.1)

[Kid Ryan]

Hi, does anyone here know of a good remuxer with a user friendly interface, that can batch or queue alot of remuxes at once?

If you do suggest a converter, please make sure it can copy the audio/video streams from MKVs and remux them into MP4s.

My System Info:
PC Model: HP 110-326 Desktop
Motherboard: Hewlett Packard 2AFB (Ivy Bridge)
OS: Windows 8.1 64-bit
CPU: Intel Pentium G2100T @ 2.60 GHz Dual Core
Video Card: Intel HD Graphics 2500 (1920x1080x32bpp 60Hz)
Sound Card: Realtek High Definition Audio
RAM (Memory): 4.0 GB Single Channel DDR3 @ 665 MHz
HDD Space: 500 GB Western Digital Caviar (SATA III)
Network Adapter: Realtek USB FE Family Controller @ 100.0 Mbps

[SeijiSensei]

Take a look at https://github.com/gavinbeatty/mkvtomp4/

It uses mkvtoolnix to disassemble the MKV file, ffmpeg to convert the audio if necessary, and MP4Box to remux everything into the MP4 container.

[Kid Ryan]

Originally Posted by SeijiSensei

Take a look at https://github.com/gavinbeatty/mkvtomp4/

It uses mkvtoolnix to disassemble the MKV file, ffmpeg to convert the audio if necessary, and MP4Box to remux everything into the MP4 container.

Thanks for the help, but I'm having trouble re-encoding HE-AAC audio into LC-AAC audio with the program.

Do you know how to do this with MKVtoMP4?

[SeijiSensei]

I've never used this program, just the tools at various times. I'd imagine the problem lies in whatever string of parameters is being passed to ffmpeg. You could do this manually, using mkvextract to pull the streams from the Matroska container, then running ffmpeg to convert the audio, and MP4Box to assemble the pieces into an MP4.

[speck123]

You can use ffmpeg to do the whole thing, though.

IIRC the current command should be:

ffmpeg -i input.mkv -vcodec copy -acodec copy output.mp4

EDIT: I was just looking up the documentation and this is a simplified version:

ffmpeg -i input.mkv -c copy output.mp4

As for batch, you could use MS batch files. Just create a txt file, rename the extension to .bat and copy the above command into the file, for how many input files you have.

For example, if you have 3 files: input01.mkv, input02.mkv and input03.mkv

#REM CONTENTS OF YOU BATCH FILE
ffmpeg -i input01.mkv -vcodec copy -acodec copy output03.mp4
ffmpeg -i input02.mkv -vcodec copy -acodec copy output03.mp4
ffmpeg -i input03.mkv -vcodec copy -acodec copy output03.mp4

[Kid Ryan]

Originally Posted by SeijiSensei

I've never used this program, just the tools at various times. I'd imagine the problem lies in whatever string of parameters is being passed to ffmpeg. You could do this manually, using mkvextract to pull the streams from the Matroska container, then running ffmpeg to convert the audio, and MP4Box to assemble the pieces into an MP4.

That seems overcomplicated and would require extra time though, but thanks for the suggestion.

Originally Posted by speck123

You can use ffmpeg to do the whole thing, though.

IIRC the current command should be:

ffmpeg -i input.mkv -vcodec copy -acodec copy output.mp4

EDIT: I was just looking up the documentation and this is a simplified version:

ffmpeg -i input.mkv -c copy output.mp4

As for batch, you could use MS batch files. Just create a txt file, rename the extension to .bat and copy the above command into the file, for how many input files you have.

For example, if you have 3 files: input01.mkv, input02.mkv and input03.mkv

#REM CONTENTS OF YOU BATCH FILE
ffmpeg -i input01.mkv -vcodec copy -acodec copy output03.mp4
ffmpeg -i input02.mkv -vcodec copy -acodec copy output03.mp4
ffmpeg -i input03.mkv -vcodec copy -acodec copy output03.mp4

That would require me to learn how to use command prompt, but thanks for trying to help.

[SeijiSensei]

I finally found this script I made a while back to remux a show in the Matroska container ....

Deleted. See below.

[sneaker]

Originally Posted by SeijiSensei

the mkvmerge utility will extract the appropriate tracks and remux them into an MP4 container.

Mkvmerge cannot output mp4.

[SeijiSensei]

Really? The output files I created with the script above appeared to play directly on HDTVs that didn't seem to know anything about Matroska. However looking at them with mkvinfo suggests they are, in fact, still in the Matroska format, even though they have an mp4 filename.

The TV in question isn't mine, so I can't really explore this in much more detail. I take it all back!

How about this? http://superuser.com/questions/44062...ert-mkv-to-mp4

[sneaker]

Originally Posted by Toddler Naruto

That would require me to learn how to use command prompt, but thanks for trying to help.

Since specks' explanation was very simple I assume you need it really really simple. It does not get simpler than this:
https://www.sendspace.com/file/p9uy6u

Select the files you want to convert to mp4 and just drag&drop them on the respective .bat-file.
- "keep_audio_format.bat" will copy video and audio
- "convert_audio_to_aac.bat" will copy video but convert audio to stereo lc-aac

[jdennis007]

I am olde and blonde so I just use Handbrake and use the add files to que and then just convert them in a batch that way.
I am not sure if it supports Windows 8 though, you would have to try and see.

[speck123]

Originally Posted by Toddler Naruto

That would require me to learn how to use command prompt, but thanks for trying to help.

You could try a front end such as FFmpegYAG and see how things pan out.

[Kid Ryan]

Originally Posted by speck123

You could try a front end such as FFmpegYAG and see how things pan out.

Thanks, I'll try out this program soon.