File Size Oddity

[Peter Robinson]

OK. So I have been recording episodes of various TV progs to a USB stick.

I usually do two at a time and then transfer them to PC to trim them if need be and chop the file into separate episodes.

All seems quite straightforward and it is. 😊

But I notice an odd thing...... I load the file, find the split point and delete the second episode. Then export.

This exports as a 9.87 Gb for approx 90 mins of HD.

The I delete the episode from the timeline and drag the whole file in again. Find the split and delete the first ep.

Funny thing is, when I export this section it ends up as 2.87 Gb. The picture quality appears identical. 

I use exactly the same settings for both. It's all .Mp4

Anybody any insight on this strange phenomenon?  

 

** I have a little piece of software that converts .Mp4 to other formats and vice-versa. If I load the big file into it and convert

it to .Mp4 (that's Mp4 to Mp4) the generated file is near to the size of the second segment exported from VideoPad.

 

 

 

 

 

 

 

[borate]

Were there contextual or effects differences between the two halves?  Odd result.  Tried lossless export?

Ran a test with a 20 minute project.  Part two:  215.19MB.  Part one: 218:46MB.

[Peter Robinson]

It was actually two episodes of "Sherlock" which I took off my Sky box with a little recording gizmo that

writes the output to a USB stick. So essentially it was one contiguous file which I merely divided in two.

I sometimes record a few hours of video and edit it on the PC to trim ad breaks etc and I get extreme

 file size differences with this procedure, even if the programmes are the same length.

Not a big prob. Just thought it was a bit weird...... 🙄

 

 

 

[borate]

Weird.  Probably not the issue, but Clear Unused Cache Files between loads.  OPTIONS | DISK.

[Peter Robinson]

Thanks. I'll do that.....

At the moment I'm slicing up a file with 4 1hr episodes. First one 6.51Gb. The rest - 1.95. 🙄