He said that included manuscripts, scrolls, engravings, art, temple art, etc. Everything. He didn't specify the format, but likely gif or jpeg. Or maybe he meant if the text were actually typed into a doc. using an appropriate font, but I thought he specifically said pics.
The really good images (TIFF format, 600+ DPI) that I work with on manuscripts run on the order of 200MB a page. There have been over 900 scrolls discovered at Qumran (Dead Sea Scrolls), all or almost all of which date before the destruction of the Temple in 70 AD, and if each were put into one such image (unlikely), that would be 180 GB of data.
So, in short, no. It would not fit on a DVD.
I very much doubt that your professor suggested that they would be stored as pictures. The point he was likely trying to make was about the massive increase in or accumulation of written information. Taking 1Gb=500,000 standard pages of raw text, one dual layer DVD would hold just over 4.3 million pages. Nevertheless, I doubt that everything written before 100AD adds up to only 4.3 million pages of raw text.
Well, they have individual CDs accompanying at least one or two of the RINAP volumes of Neo-Assyrian royal inscriptions(the volumes have the full collated texts of the inscriptions, the CDs have the score), so I'm not even sure you could put those all onto one CD.