file sizes for dvd authoring

[kasfig]

Dear forum
Concerning this query, please forgive if I seem uninformed i am just a newbie
I have been using the free prog dvdbuilder to author dvds then I burn using nero 7 to create a dvd for watching on tv. I have been using mpeg2 files I got by recording tv programs using dvb-t usb dongle.
I wish to know what total size of file (mpeg2) I can get on one dvd.
When I assemble the files for authoring, they total , say, 4.gigbyte
After dvd builder has assembled the files in the video-ts folder they have increased in total size. (to about 4.4gigbyte )
When I tried to burn this folder to dvd-video using nero it said it was 4.9 gbyte and too much for a dvd disk .

therefore I would like to ask what max mpeg2 file total size can I start off with for dvd authoring

I would like answer for both single layer and dual layer dvds please
Yours with thanks
Ian
ps can standalone dvd players for tv '

[Baldrick]

4.37 GB = 4480 MB
7.95 GB = 8150 MB
https://www.videohelp.com/dvd#dvdsizes

[borax]

therefore I would like to ask what max mpeg2 file total size can I start off with for dvd authoring

There is no 100% answer possible, it depends on the mpeg2 file itself and the authoring process. I don't know dvdbuilder, therefore I also don't know if it reencodes the video (in this case there is no 'precalculation' possible). If Nero wants to add an additional 0.5 GB, it looks like Nero wants to reencode the files too... 'Simple burning' would add max. 1 MB to the total size of your VIDEO_TS folder (filesystem overhead).
For elementary streams (separate video + audio files) the total size can roughly be calculated:
Totalsize_in_MB = Videosize_in_MB + Audiosize_in_MB + (VideoDuration_in_seconds * 0.011) + some MBs for menus if any.

[Bjs]

Are you sure nero isnt being an idiot and trying too re-encode already compliant dvd file's ... in the setting's ...
Not to forget to take into account the bitrate used for the encoded mpeg2 video stream ... you can alway's lower it enough to fit using dvdshrink .

[borax]

...nero isnt being an idiot

Use ImgBurn to burn Video DVDs. The new 2.2 version is superb! (and free)

[kasfig]

Thanks all for these helpful answers. I shall look into all these helpful comments
Ian