Mobility Site - View Single Post - Techniques and tricks to make hi-quality low bitrate VGA-res MPEG's

02-28-05, 08:34 AM

> But why?

Why what ? Are you making reference to the question about returning to DVD ?

> Xvid is better then mpeg1 - often more then 30% especially in low bitrates (600-800kbps)

If you are taking about VGA resolution - yes, you will certainely get something noticeably better with Xvid at 600 Kbps than with MPEG-1 at 600 Kbps, but it will not look good in either case. Blocks will be more blurry than blocky with Xvid, but 600 Kbps is very stressed to code VGA res.

> this is important when you have 512MB, 1GB card
Try xvid 1.1 with VHQ4, VHQ for BFrames and good quantization custom table for medium, low bitrate.

At VGA ? Can you really get decent quality at full framerate in VGA at 600 Kbps ? Really ?

> Effect is really good - i don't have vobs from 5elementh but i think 1MBps is enough for this sample to beat 1.7MBps mpeg-1 (70%).

I've provided the vob to Enragin_Angel, we'll see what he can do at 800 Kbps. I'b be surprised it's better than our sample.

Again, the point of this thread is not to discuss the compression efficiency of Xvid vs MPEG-1, it's to show that MPEG-1 can be used very efficiently (some people still think MPEG-1 is only for VCD i.e. QVGA at 1.5 Mbit/sec!!!).

02-28-05, 08:34 AM	#8 (permalink)
PocketTV Team Guest Posts: n/a	> But why? Why what ? Are you making reference to the question about returning to DVD ? > Xvid is better then mpeg1 - often more then 30% especially in low bitrates (600-800kbps) If you are taking about VGA resolution - yes, you will certainely get something noticeably better with Xvid at 600 Kbps than with MPEG-1 at 600 Kbps, but it will not look good in either case. Blocks will be more blurry than blocky with Xvid, but 600 Kbps is very stressed to code VGA res. > this is important when you have 512MB, 1GB card Try xvid 1.1 with VHQ4, VHQ for BFrames and good quantization custom table for medium, low bitrate. At VGA ? Can you really get decent quality at full framerate in VGA at 600 Kbps ? Really ? > Effect is really good - i don't have vobs from 5elementh but i think 1MBps is enough for this sample to beat 1.7MBps mpeg-1 (70%). I've provided the vob to Enragin_Angel, we'll see what he can do at 800 Kbps. I'b be surprised it's better than our sample. Again, the point of this thread is not to discuss the compression efficiency of Xvid vs MPEG-1, it's to show that MPEG-1 can be used very efficiently (some people still think MPEG-1 is only for VCD i.e. QVGA at 1.5 Mbit/sec!!!). Last edited by PocketTV Team; 02-28-05 at 08:43 AM.