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fordprefect · 2007-10-14, 16:58

Hi, I'm relatively new to playing H.264 files, but I've noticed that most of the H.264 releases are larger in filesize than their XviD counterparts. It pretty much makes burning a 26-episode series on one DVD impossible.

I've seen a lot of the H.264 encodes at HD resolutions, while most XviD encodes are done at smaller resolutions to save on space. But if the H.264 spec was designed to capture information at lower bitrates, then intuitively, shouldn't most encodes be comparable in size to the XviD versions, even at higher resolutions?

For comparison, I see most XviD files (704x396) are around 170-180 MB, while H.264 files (1280x720) are in excess of 240 MB. I can understand that 720p is a lot more pixels to encode than 480p, but for my edification, is 240 MB really the "best" that H.264 can compress, or are these encodes quite liberal with their bitrates?

2007-10-14, 16:58	Link #204
fordprefect Junior Member Join Date: Oct 2007	Question about H.264 file sizes Hi, I'm relatively new to playing H.264 files, but I've noticed that most of the H.264 releases are larger in filesize than their XviD counterparts. It pretty much makes burning a 26-episode series on one DVD impossible. I've seen a lot of the H.264 encodes at HD resolutions, while most XviD encodes are done at smaller resolutions to save on space. But if the H.264 spec was designed to capture information at lower bitrates, then intuitively, shouldn't most encodes be comparable in size to the XviD versions, even at higher resolutions? For comparison, I see most XviD files (704x396) are around 170-180 MB, while H.264 files (1280x720) are in excess of 240 MB. I can understand that 720p is a lot more pixels to encode than 480p, but for my edification, is 240 MB really the "best" that H.264 can compress, or are these encodes quite liberal with their bitrates?