Joining creates much larger files

FreakyPete

New member
I wonder if someone can tell me what I'm doing wrong.
I have copied 4 MPG files from my Topfield TRF2400 onto my PC.
They are all parts of the same football game, so uniform video and audio.
I have edited the files to remove extraneous material and saved to ,mp4 format.
I ended up with 4 files about 1.5 GB in size.
When I joined 1 & 2, it takes a long time (over half an hour) and I get a single file nearly 7 Gb in size.
I have not change the MP4 profile - it's set to Intelligent Recode but still recodes anyway.
What is going on ?
I just want to join 4 simple files.
 

Danr

Administrator
Staff member
Which output profile are you using when saving? Does the save dialog mention that it's doing a full recode?
 

jmc

Active member
I wonder if someone can tell me what I'm doing wrong.
I have copied 4 MPG files from my Topfield TRF2400 onto my PC.
They are all parts of the same football game, so uniform video and audio.
I have edited the files to remove extraneous material and saved to ,mp4 format.
I ended up with 4 files about 1.5 GB in size.
When I joined 1 & 2, it takes a long time (over half an hour) and I get a single file nearly 7 Gb in size.
I have not change the MP4 profile - it's set to Intelligent Recode but still recodes anyway.
What is going on ?
I just want to join 4 simple files.
That indicates that the two file are not "identical".

Recorded shows can have a lot of odd bits...
Audio channels,bitrates etc can change between show and commercial.
Any bits of that left in the file can be a problem.

I would edit and "combine" in MPG with a SET defined audio format.
MPG is a simpler file format to edit with.
Then compress to MP4.
If there is "combine" MPG problem then probably force the audio of each one to the same set values.
Then combine mpgs and create MP4 file.

Working with the MP4s you have...
Forcing the audio of each MP4 to the same defined Audio profile should be fairly quick to do.
Then try a "join" again.
 
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