Can't get same quality when converted Divx to VCD

[Maximus_Slipknotus]

I want to know is it possible to get the same "exact" quality when converting from divx to VCD (MPEG-1). I have tried every mitch match setting using TMPGenc. But for some reason it is always less quality than the original. Does anyone know how to get the same "exact" quality as the source divx?

[Movie Info]
Image: W-512 pixels, H-288 pixels
Frame Rate: 23.976
Duration: 1:37:11
Data Rate: 120kps
Video Compression: DIVXMPEG4 V3

If any1 can help it would be much appreciated
Thanks

[vhelp]

maximus,

Unfortunately, no... becaues you have to re-encode it. Again, you'll loose
additional quality because of this. There is no ripping process for divX as
there is for DVD.

-vhelp

[Maximus_Slipknotus]

Is this also true with .avi files?

Thanks

[Anonymous65]

It is true for *uncompressed* AVI. AVI can mean many things, you have to make sure it's uncompressed.

[sterno]

Also remember that divx files pretty much suck as source material for MPEG encoding, and VCD quality is poor at the best of times. divx files may look great on your computer, but the compression tends to be very destructive. A 512x288 source might look a little better as SVCD, but don't expect any miracles.

[wholagan]

I want to know is it possible to get the same "exact" quality when converting from divx to VCD (MPEG-1). I have tried every mitch match setting using TMPGenc. But for some reason it is always less quality than the original. Does anyone know how to get the same "exact" quality as the source divx?

Actually there is a way to make a vcd that is very close(not exact, but close) to the source. All you have to do is to encode it as a SVCD and use the header trick by using TMPGnc. Read this guide here. If your having problems just go ahead and drop me an email or post it here.

[bugster]

I want to know is it possible to get the same "exact" quality when converting from divx to VCD (MPEG-1). I have tried every mitch match setting using TMPGenc. But for some reason it is always less quality than the original. Does anyone know how to get the same "exact" quality as the source divx?

The answer is simple and the process is very easy. Start with a really crappy divx file and the quality of the VCD will be pretty much the same!

Not what you wanted to hear I know but i couldn't resist, sorry.

[Hertog_Martin]

A divx wich is ripped from a DVD.. if you encode it back to DVD then why is there quality loss? Its the same thing just the other way around.

BTW can anyone help me with something? I downloaded a whole season in dvdrip (divx) and want to encode to DVD and fit about 5 eps on a DVD..

Specs:

640x480, 25fps
time: 43.00
DivX MPEG-4 Low-Motion
Number of Key frames: 1951
min/avg/max/total keyframe size: 1507/12705/32965 (24208K)
min/avg/max/total delta frame size: 152/4813/42029/ (290894K)

So if I want to convert this to DVD with TMPgenc with VBR then what should I use as bitrate? 2 pass??? dunno about those things

and then what as maximum/average/minimum to get maximum quality? I want the best quality possible but still fit as much as possible eps on one DVD.

WOuld be great if someone knew cause I have to do it with 22 eps so if i know one i can do the rest myself

[banjazzer]

Also remember that divx files pretty much suck as source material for MPEG encoding

This is incorrect. Some DivX are poor quality. Some are almost indistinguishable from DVD. It really depends on whether people know what they are doing. With most material it is possible to produce very high quality DivX encodes up to 100 minutes to fit on one CD. If you start with a high quality DivX, you can make a high quality SVCD. Certainly it would be better to encode SVCD straight from DVD (one less encode), but done properly from a quality source you can still get a high quality result.

[crahak]

bajnazzer is right. DivX is a compression algorythm. Just like if someone said mpeg2 sucks for a source, makes no sense. However, crappy DivX movies downloaded off the net (which you really shouldn't be doing anyways) tend to suck, yes, but they're still at least as good as most SVCD's I've seen, and by far better than VCD's.

Also, keep in mind that every time you reencode, you will loose quality. Even if it's converting it to DVD. You won't quite loose as much conerting it to a DVD format compared to VCD, say, but you still will.

So either you live with lower quality encodes, or you watch em on TV from a s-video out of your PC's video card, without hassles of 8 hours long reencodes and all...

[TechKnow]

Read this guide here. If your having problems just go ahead and drop me an email or post it here.

I know this thread wasn't specifically for me, but it has been VERY useful. I read the guide, and it makes sense, but suppose the frame rate is 14.985, which Im assuming is a frame filmrate, would I need to do anything differently other than use the NTCS Film setting TMPGEnc?

[sterno]

Yeah, OK, that was a silly way to say it. I suppose that what I actually should have said was that I have very rarely seen any divx movie with high enough quality to give good results when converted to VCD (never mind SVCD). Low resolutions, low frame rates, and low bitrates are all very common.

divx has now been around long enough that there actually is a fair amount of legally downloadable material out there encoded with some form of divx/mpeg4. I am far too impatient to download full-length movies, I need my instant gratification!

[banjazzer]

but suppose the frame rate is 14.985, which Im assuming is a frame filmrate, would I need to do anything differently other than use the NTCS Film setting TMPGEnc?

This is a non-standard framerate, so I'm not sure how you can set about encoding this in TMPG. 14.985 is half NTSC framerate (29.97).

[vhelp]

that 14.985 framerate will just studder, no matter what you do to it, even
in TMPG.

It's one thing when you have the full framerate ie, 29.970 (59.940)
and play around w/ TMPG frame stettings. TMPG will insert the proper
frames ie, 14.985 (internally 29.970fps) this is different because again,
you have the 29.970 (above) as you encode. And, tmpg, will insert the
frames from the 29.970 (59.940) during encoding. So, you don't loose
any frames, but when someone uses something like vdub, and encodes
to a divX, to say, 14.985, you loose all the rest of the true frames, and
no hidden or true flagged frame insersion. You can't re-create those missing
frames. There gone. This is an MPEG-1/-2 thing, not divX. As far as I
know, there is no provision for these kinds of framerates like what TMPG
has.

I hope I explained that properly.
-vhelp

[RP25]

Well converted Scooby doo and I upped the bitrate for my SVCD comes out Almost..... as good as the Divx but on 3 cds !

I can do Ice Age divx and since its already cartoony animated on SVCD looks stunning very similar to DVD quality. But u can get away with it with those films.