combining two mp4 files into one..how?!?

[illuro]

I'm trying to merge two mp4 files but nothing works, I tried MP4box, but it put the shorter one first, when I wanted it last.

[redwudz]

Maybe AVIDemux? Just open the first file and append the second file to it.

And are both files exactly the same? If not, you may have joining problems.

And welcome to our forums.

[Budman1]

What has always worked for me, if, as Redwudz pointed out, they are the same everything, use ffmpeg.

Make a FileList.txt as with the following text inside:

file 'C:\Users\Bud\Desktop\Various test Formats\YourFileName1.mp4'
file 'C:\Users\Bud\Desktop\Various test Formats\YourFileName2.mp4'

Put the file in a folder with your FFMPEG.exe file and run the following from CMD prompt:

ffmpeg -f concat -i FileList.txt -c copy "C:\Users\Bud\Desktop\Various test Formats\_Joined_1.mp4"

[qz3fwd]

try solveigmm video splitter, tmpgenc mpeg smart editor, videoredo.....

[illuro]

They are NOT the same file size. One is 20 minutes, the other is 2.

[poisondeathray]

He actually means frame dimensions, not file size

For example, you cannot append a 1920x1080 file to a 640x360 file

The duration of the videos doesn't matter - but other characteristics do matter, such as the type of encoding (compression used) , number of tracks

You can use mediainfoxp (view=>text) to get more information on the files . Copy & paste the text back here
https://www.videohelp.com/software/mediainfoxp

[illuro]

Oh, right, I'll give the recommendations a try...