Adding mp3 audio to an mp4 video

[durtsurf]

I have been trying to figure out how to combine the mp4 video from my camera with an mp3 audio track of music. I have multiple videos and have found songs that are basically the same length as the videos. I just want to stick them together with no editing. I don't really care if the video or audio gets a bit cut off, this is just for fun on youtube. I beleive I could convert the video to another format with some sort of software and then use windows movie maker to finalize the video with the audio but I really want this to just be simple. Just mash the mp4 with the mp3. I don't even really care if I lose the audio from the mp4 video and it just plays the mp3 audio or if it is a mix of the two audios. I tried using a YAMB program and it said it muxed but I could not find a mixed program. I did find a video with no audio right next to the video with the original audio, but no mixed video. Maybe I just don't know how to use the YAMB program or maybe I need to try something else. Any ideas?

[Baldrick]

Try instead mymp4boxgui. It's a bit easier than yamb. Add the mp4 and mp3 and mux.

[codemaster]

I can suggest two solutions:

Solution 1:
- install XviD4PSP, Audacity, MeGUI, neroAacEnc, Yamb;
- open the mp4 file in XviD4PSP, at format choose "Audio", at "Audio encoding" select "PCM 16bit", click "Encode"; this will create a wav file;
- open the wav file and the mp3 file in Audacity, mix them, and save to wav;
- open the new wav file in MeGUI, and encode it to AAC-LC, with bitrate 384 kbps; this will create a m4a or mp4 audio file;
- use Yamb to extract/demux the video from the mp4 file, and to mux it with the newly created m4a or mp4 audio file, into an mp4 container, a new mp4 file;
- upload the newly created mp4 file to youtube.

Solution 2:
- install VirtualBox;
- in VirtualBox, create a virtual hdd for Linux Mint or Ubuntu;
- install Linux Mint or Ubuntu on the virtual hdd;
- in Linux Mint or Ubuntu, use the Synaptic package manager to install a non-linear video editor called OpenShot, from the distro's repositories;
- use OpenShot to edit the mp4 file (add the mp4 file on the timeline, trim it if you want, add a new audio track on the timeline and add the mp3 file into it);
- render the OpenShot timeline to an mp4 file, with AAC-LC audio with 384 kbps bitrate, and with H.264 video with 5000 kbps for 720p and 8000 kbps for 1080p;
- upload the newly created mp4 file to youtube.

The advantages for Solution 2:
- you can cut sections from the video clip, to exclude parts from it if you don't want those parts to be uploaded on youtube;
- you can trim to shorten the length of the video clip if you think it's too long;
- you can trim so that the clip starts from a specific in point, and ends at a specific out point;
- you can split the clip in two or more parts, if the clip is longer than 15 minutes;
- you can insert titles, transitions, fades, images, and watermarks;
- you can edit and mix audio (which is the only thing you can do with Solution 1).

[durtsurf]

Baldrick,
I tried mymp4boxgui and it was just too laden with malware to even use.
Codemaster,
It looks like you put a lot of thought into your response and I appreciate your efforts but that is way over my head.
I am looking for a simple solution to just put an mp3 audio track onto an mp4 video.
Any other thoughts?

[Baldrick]

No, mymp4boxgui doesn't contain any malware?https://www.virustotal.com/en/file/f8bcd132e69a9d943249c696a2053538c5791e1c3d4e91d2b95...is/1380610848/

https://www.virustotal.com/en/file/adffa1c6b662c0c49bfb05ca9468e182a6e37dc82090b7bec30...7fd9/analysis/

And I just tried it without seeing any adware installers.

[codemaster]

I am looking for a simple solution to just put an mp3 audio track onto an mp4 video.
Any other thoughts?

I think Solution 1 is very simple, but a solution that is even simpler is:

step 1: use yamb to extract the video track from the mp4 file;
step 2: use the "MP4 Muxer" tool from MeGUI to create a new mp4 file, with the video track extracted at step 1, and with the mp3 audio track;
step 3: upload the newly created mp4 to youtube.

[durtsurf]

By the way I did end up finding an easy solution. All of the stuff posted here was not easy or was laden with malware. What I ended up doing was using gopro software that is easily downloaded from the gopro website to convert my mp4 videos to avi. Then I use windows movie maker to mix the mp3 audio with the avi files. Works great, no malware, and I am starting to learn other editing tool on movie maker.
Hope that helps if anyone out there is in my boat...

[Baldrick]

Thanks for posting your solution...but mymp4boxgui is still no malware.