29 January 2007

Mpeg 4

Today I ripped The Matrix again and converted it into Mpeg 4 AVI (Xvid). My Matrix DVD is NTSC 16:9 format with english AC3 sound. In that case my particular workflow was:

DVD Decrypter ver Read more
AutoGK ver 2.40 Read more and download

My main objective is to save some disk space, keeping high audio and picture quality. Also, my current media renderer D-link DSM-320 hangs playing huge VOB files. So, basicalyy I'm searching the way to playable.

First DVD Decrypter phase copies the raw content of DVD to HDD, removing copy protection. AutoGK phase converts number of 1 GB VOB files to one AVI file.

Size matters

VOB form: 5 GB (main movie + AC3 Dolby Digital 3+2/1 soundtrack only, 720 x 480)
AVI MPEG 4 1,86 GB (Target quality 100%, 720 x 304 resolution)

BitRate while playing: AVI 1954 Kbit/s; VOB 7600 Kbit/s (measured by DSM-320).

Viewing experience

First I looked video from my Dell Optiplex 20" Wide aspect monitor. I looked good.
Then I copied the AVI file to my Media Server and lloked it via D-Link DSM-320 media receiver on my Hitatchi 42" 1080HD plasma and Onkyo TX-L55 digital receiver. The result was disappointing. Sound was good -- as soundtrack is probably unaltered during compression, but image was unharp and had problems with moving objects and camera panning. Movements were jerky, not smooth. Soud was badly out of sync. Not recommended.

Next steps

Have to try other media renderers. May-be I have to build one, based on Intel SFF desktop PC?

No comments: