Xvid Config & Divx

[firered]

I am encoding a 30 Minute video which was captured using ATI Theater 550 Pro capture card using composite video from my DVR Box. The capture resolution is 720x480 and is in MPG2 format. The source is progresssive and dosent need to be deinterlaced. Anyway I want to encode this video in either 640X480, or 624X448, 608X448, 592X448 or 512X384 the resolution size dosent matter to me. Anyway Im using Divx Pro 6.12 and I want to retain file size about 250MB's or so. So my question is im using quality based option what would be a good fixed quantizer number to matain high quality with the desired file size, or recommend a good bit rate for bit rate based option. please help me out

[redwudz]

2.0 should give you about the same quality as the original in the quanitizer setting. Lower may give you a little better quality, but the filesize will increase.

You realize that the MPEG filesize has no real relation to the encoded Divx size. All encoding sizes are based on the running time and the bitrate used. IE, a 250MB MPEG does not equate to a 250MB Divx for the same quality. But you probably know that.

[guns1inger]

30 minutes is around 920kbps with 128kbps audio. Not unreasonable if you choose the 608 or 592 res.

[firered]

yea so if i set the quantizer to 2 the file size will increase right? Ok any suggestions on a specific bitrate for a decent quality for a 30 min video and yea the source was mpg but want to use either xvid or divx in the avi container

[guns1inger]

Thoses settings will give you a 250 MB output file. Use them and encode a couple of minutes worth at various resolutions to see what looks best.

[firered]

30 minutes is around 920kbps with 128kbps audio. Not unreasonable if you choose the 608 or 592 res.

yea im going tinker around with the resolutions will those setting work in divx and xvid?

[TJohns]

Give ASPECT CALCULATOR a try ... you put in "required" Aspect Ratio (4:3, 16:9, 640:480, whatever) , select a "mutiplier" figure (frame size multiple of 2, 4, etc), enter running time & frame rate, enter an audio rate (128, 256, etc), enter your required output file size, hit "autosize" and it calculates an output frame size that gives an "okay" video image for the given specs. The acceptability if determined by the calculated number of bits/pixel on the encoded video frames (<0.15 bad, 0.15-0.25 okay, >0.25 great)

Trevor

[firered]

so after i use the calculator am I supposed to imput into gknot for xvid or divx

[sarmin]

where can i download a ASPECT CALCULATOR.

[redwudz]

Aspect

It's in 'Tools>Bitrate Calculators' to the left. <<<<<< Sometimes short names don't link.