I haver about 50 family DVDs I'd like to convert to Xvid. I converted 1 DVD with AutoGK just using the default settings of the program. It looks O.K. Can any users just give me some pointers as to what settings I should use for best quality results
+ Reply to Thread
Results 1 to 21 of 21
no clue about best quality, but using higher bitrates tends to help with the quality,..
Why not H.264 instead of XviD?
You can do a quality based encoding but you have no control over the bit rate. I do not do such encodes, but some of our experts do. If I encode to Divx then I am targeting specific file sizes. If I remember correctly you will need to do what is called encoding for CQ or something like that.
You might want to explain what your goal is. For example, if it's "I want to convert all my DVDs and then throw them out" then you probably should go to H.264 as V1de0Luvr says. If "50 family DVDs" really means "movies/shows for kids that are family oriented and I just need a safety copy for my kids to watch" then Xvid is fine. If these are precious home movies and you have no intention of getting rid of them but just want to encode to be able to play back smaller files on a variety of platforms than Xvid probably is a good choice.
CQ means "constant quantizer" not "constant quality",.... there is no such thing like 'quality based encoding' for Xvid afaik,...
I wish you would stop making that differentiation without explaining what it means.
No clue, why you jumped to x264s CRF, but for amusement:
CRF does not guarantee any of the following:
1. Same quality between different sources.
2. Same quality between different scenes in the same source.
3. Same quality between different settings on the same source.
That takes care of the video side, you can also improve things for audio. Click the Advanced Settings in the STEP 4 box. Under audio, set whether to use original audio or convert to MP3. If you intend to playback your movies with a DVD player, original audio might not be compatible. MP3 has the best compatibility, but implies a re-encode and some loss of quality. Keep the bitrate high to lessen that, but do not exceed 320kbps.
All this will improve the quality, but the file size will be much higher. Typically, a 2 hour DVD will convert to between 1 and 1.5 GB. Video noise and jerkiness can make the file grow even bigger.
Selur - Read my post. I NEVER said what CQ means. I didn't even remember. Of course the easy way to deal with this is to remember that higher bit rate should mean better quality, so just up the bit rate if you don't like what you see.
The only suggestion I have on top of nic2k4's post, is that if you can you should probably use MP3 audio in CBR mode and not in VBR mode. The space savings for VBR over CBR are minuscule and VBR can cause audio synchronization issues on some (but certainly not all) playback devices.
Well after all that I am not happy with the final quality. Anything scrolling looks jerky, and faces look a little washed out. Is there a program that will convert to Xvid with better quality output? Or do you lose quality anyway?
Yes you will always lose quality, since MPEG-4 ASP is a lossless compression format.
better quality -> select lower quantizer or higher bitrate,.....
AutoGK is about the best for a beginner.
I recommend you post before and after samples so people can tell you what's going wrong. And what you need to do to alleviate the problems.
No there are no 'optimum' settings, the auto in AutoGordianKnot is there because it is designed to only give the user some limited options to fix some known problems or to force some stuff.
AutoGK creates is named filename_agk.log
You open it in Notepad and copy and paste what it says here. Maybe using small text as it might be pretty big. Here's one I just created in order to show you what it looks like:
[9/11/2012 11:45:12 AM] AutoGK 2.55
[9/11/2012 11:45:12 AM] OS: WinXP (5.1.2600).2
[9/11/2012 11:45:12 AM] Job started.
[9/11/2012 11:45:12 AM] Input file: E:\Compilation DVDs\Early Helen\12 O'Clock\VTS_01_1.VOB
[9/11/2012 11:45:12 AM] Output file: E:\AutoGK\Helen.avi
[9/11/2012 11:45:12 AM] Output codec: XviD
[9/11/2012 11:45:12 AM] Audio 1: Audio Stream 0 AC3
[9/11/2012 11:45:12 AM] Subtitles: none
[9/11/2012 11:45:12 AM] Format: AVI
[9/11/2012 11:45:12 AM] Target quality: 75%
[9/11/2012 11:45:12 AM] Audio 1 settings: Original
[9/11/2012 11:45:12 AM] Started encoding.
[9/11/2012 11:45:12 AM] Demuxing and indexing.
[9/11/2012 11:45:14 AM] Processing file: E:\Compilation DVDs\Early Helen\12 O'Clock\VTS_01_1.VOB
[9/11/2012 11:45:14 AM] Source resolution: 720x480
[9/11/2012 11:45:14 AM] Found NTSC source.
[9/11/2012 11:45:14 AM] Source aspect ratio: 4:3
[9/11/2012 11:45:14 AM] Source seems to be pure FILM.
[9/11/2012 11:45:14 AM] Output will contain 7322 frames
[9/11/2012 11:45:14 AM] Using VAQ in XviD
[9/11/2012 11:45:14 AM] Running single pass encoding.
[9/11/2012 11:45:14 AM] Writing the following script to E:\AutoGK\agk_tmp\Helen_movie.avs
movie = mpeg2source("E:\AutoGK\agk_tmp\Helen.d2v")
cropclip = autocrop(movie,mode=0,wmultof=4,hmultof=4,samples= 10,aspect=0,threshold=34,samplestartframe=0,leftad d=0,rightadd=0,topadd=0,bottomadd=0)
fixed_aspect = 0.888888888888889
c_width = width(cropclip)
c_height = round(height(cropclip) / fixed_aspect)
input_par = float(c_width)/float(c_height)
input_par = (input_par > 1.4) || (input_par < 1.25) ? input_par : (4.0/3.0)
out_width = 720
out_height = round(float(out_width) / input_par)
hmod = out_height - (floor(out_height / 16 ) * 16)
out_height = (hmod > 4) ? (out_height + (16 - hmod)) : (out_height - hmod)
new_aspect = (float(out_width) / float(out_height)) / fixed_aspect
autocrop(movie,mode=0,wmultof=4,hmultof=4,samples= 10,aspect=new_aspect,threshold=34,samplestartframe =0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
[9/11/2012 11:47:47 AM] Duration was: 2 minutes 33 seconds
[9/11/2012 11:47:47 AM] Speed was: 47.77 fps.
[9/11/2012 11:47:47 AM] Job finished. Total time: 2 minutes 35 seconds