MP4 with 2 Audio Streams

[kohkae]

Hi,

I need to convert a batch load of MPG movies for my work. We have decided on MP4 format but we need to include 2 audio streams. I have searched everywhere (i think) for conversion software that can create MP4 with 2 audio streams but I've found nothing. I know there's some MAC software that can do it but we use PC's and as of yet I've only found software that can encode to MP4 with 1 audio stream.

Does anyone know of any software that can do 2 audio streams?

If you're wondering why we need 2 audio streams, the company I work for produces karaoke video DVD's with dual audio so we need to encode with both audio streams.

Please can someone help?

Thanks

[Baldrick]

So your mpg contains two audio tracks?

Have you tried the command line utility ffmpeg?

`-newaudio'
    Add a new audio track to the output file. If you want to specify parameters, do so before -newaudio (-acodec, -ab, etc..). Mapping will be done automatically, if the number of output streams is equal to the number of input streams, else it will pick the first one that matches. You can override the mapping using -map as usual. Example:

ffmpeg -i inputfile.mpg -vcodec libx264 -acodec aac -ab 192k outputfile.mp4 -acodec aac -ab 192k -newaudio

(h264 video and aac audio)

[poisondeathray]

Another option is to mux dual audio tracks with video with MP4box -command line also (YAMB is the GUI). This is separate from the encoding software

Not very many GUI's allow for 2 audio tracks (that have both encoding and muxing). AutoMKV is one that does, you may also want to try that

[klinediscream]

MeGUI also has a MP4 Muxer, that I believe can support dual audio (You can even label them with a specific name to denote the language of the audio track). I haven't tried doing this myself, but give it a try. This program seems to have more support than YaMB as far as MP4Box GUIs go.

Retrieved from "http://mewiki.project357.com/wiki/MeGUI/HDTV_Transcoding_Guide"

Muxing the audio and video together
Download MKVMerge: Download MKVToolnix from its homepage
Select input files: Open mmg.exe, and add as sources both your encoded video and the original file that contains audio
Choose output streams: Uncheck all streams that aren't required.
Set output track options: Set languages for any audio / subtitle streams and if there are more than one, name them. If required, set the correct audio delay for any audio streams.
Mux: Choose save location, and click start muxing.
All done

MeGUI seems to work best under Windows XP (I'm running XP Service Pack 3), but read this to try getting it to work under Windows Vista.
http://mewiki.project357.com/wiki/MeGUI/FAQ#MeGUI_doesn.27t_work_in_Vista.21