SIZE OF VOB FILES

[mourer]

Hello,

Can someone explain why two DVD movies of same length (2 hours) and apparent same picture quality need different files size:

Momy : 7 GB (2:05 hours)
Planet of the Apes : 4GB (1:55 Hours).

Can an expert answer this question ?

[apollo]

Hi m8 I'm no expert but if the movie contains DTS as well as Dolby Digital this can increase the size. I have found that DTS can be around 1.5 gb

[SLK001]

Could be the extra ES (elementry streams), as Apollo mentioned, and also remember that a DVD uses VBR. If the encoder selected a higher bit-rate, then the resulting files will be larger. Also, the complexity of the material may require a higher bitrate. If you really need to know this, rip a chapter out of each one, demux the video, then feed it into BitRate Viewer to see the average BR.

[poopyhead]

don't forget aspect ratio can be different too, full screen needs a bigger filesize to achieve the same quality as those really skinny anamorphic widescreens

also, there could be more special features, etc. that add to it (also director's commentary can also make it bigger)

[mourer]

I looked at the movies, effectively 'the momy' is full screen 16/9 letterboxed' while 'Planet of the Apes' has top and bottom black lines.

To rip 'the momy' on a single DVD-R, i suppressed all extra and bonus, removed DTS audio stream and subtitles, but the resulting size is 5,4 GB.

I used ReMpeg2 to reduce bitrate, but the resulting movie has a visible loss of quality on some scenes.

You gave me an idea : Maybe i could change aspec-ratio to remove widescreen format and get a resulting file less than 4,7GB without slowing bitrate ??

Wath do you think about that ?

[AntnyMD]

Rip the movie into two < 4.3gb chunks, then re-author onto a double-sided DVD-R.