Lossless export not the same size

Dana_Burns

I am curious, if I use other tools I generally get the exact same size output file as the total of the files being joined. Which is a good indicator that there was no conversion and a straight merge.

However, more often than not, when using Video pad and selecting the lossless export the sizes are different. Point in case is the below:

2025-04-27 07:41 AM 511,861,414 1.mp4
2025-04-27 07:41 AM 590,320,301 2.mp4
2025-04-27 07:41 AM 576,727,252 3.mp4
2025-04-27 07:41 AM 576,331,227 4.mp4
2025-04-28 09:40 AM 1,633,292,790 Untitled.mp4
5 File(s) 3,888,532,984 bytes
2 Dir(s) 23,873,857,556,480 bytes free

if this was truly a "lossless" conversion (and the output file does look the appear to be merged and viewable) why is the output file 1.52GB and the input files 2.09GB?

Looks to me like the lossless export just lost 25% of the data.

Can someone explain please? I don't get this behavior with any other conversion applications. Just VideoPad.

c_major_2

Could it be multiple video or sound tracks in those files? VideoPad only exports one video and sound track.

Another reason I can think of is that VideoPad only exports video and sound information. MP4 is a complex container format and can contain any data e.g. thumbnails, publisher information etc.. These information would not be exported.

Dana_Burns

There are no multiple tracks. I can see dropping the tags, and imbedded pictures etc. However, there are none, and definitely not half a gig of data. I've converted the same videos with Boilsoft Video Joiner and MP4Joiner and the outputs are the appropriate "same" size.

borate

Share one of those files. Upload the file/s to a free server, such as Google Drive or MS OneDrive, right-click the link and Share or Copy. Copy the result and paste it here or to me in a Private Message via the mail envelope in the top-right corner of this forum. When using Google Drive, click SHARE | SHARE and change "restricted" to "anyone with link can view.**