Filters to AVI--> DVD conversions

[Susana]

Hello,

I'd like to know where to find information about what filters to use when I convert AVI(divx, xvid), from DVD-rip, to DVD (mpeg-2).

Thanks
Best Regards.

[esby]

That mainly depend of your source.
Usually, you better not doing that.
Because:
- It may be illegal in the first point.
- you can't get back the quality that was lost when converting to avi the first time.
- filtering depends, as I said of the source, and depending what do you call quality, you may need no filtering with a properly encoded avi while you may need some if the encode (or previous) filtering was not done properly.
In any case, the best thing to do is to encode from the original source and not a modified one.
Now there is no filter specific to the kind operation you talk, except maybe blockbuster to add noise to reduce slightly macroblocking and it is not necessary all the time...

esby

[Susana]

Well, I expected an answer like this, thanks in any case.
I've never said that avi was copyright-protected, or that I didn't have the original dvd. Maybe you are schocked for some people who use dvdrebuilder, which there is a forum in this place about, without owing the original :eek:

If anyone knows something... thanks

[esby]

Well, I expected an answer like this, thanks in any case.
I've never said that avi was copyright-protected, or that I didn't have the original dvd. Maybe you are schocked for some people who use dvdrebuilder, which there is a forum in this place about, without owning the original

You did not said it.
But 90% of the people asking for that will infrige rule #6.
(When they will not use (c) software to do their backup...)
I am not 'schoked' in any way, but you are to follow the rules.
Now I don't know about the other forum parts.
I guess that describing the technical way of backupping or converting
non or copyrighted materials is ok, as long it can be used by people in a legit way.

Now, Please remind yourself that you asked for a magical solution too.
There is no 'magic' filtering for video that was already encoded by a lossy codec. In some case, filtering will help, but it is usually not related with the lossy conversion process.

This forum is related about avisynth usage, so if you show some sample of video with a particular problem or just describe a specific problem , You'll probably get an answer, now "filtering for 'avi' encoded with xvid/divx to dvd" subject is too vague and personnaly I can't answer that...

esby

[Mug Funky]

on the rare occasions that i do this (hmmm... do fansubs violate the rules? there's so much grey area in the backup world that i suppose it's better to be safe than sorry) i'll do a deblock using xvid's vfw decoder (set this in virtualdub under "codecs"), and also do a limitedsharpen if i can spare the time.

for ex-low bitrate stuff, deblocking helps a lot, but expect the result to be unrecoverably blurry. sometimes it's the lesser of two evils (blocks vs blur).

deblocking is usually quite easy to get away with, but de-ringing will remove bits that may or may not be detail (esp. if the original encode was done with trellis - it could be putting in more detail than the frame quantiser would otherwise imply, and the de-ringer will remove this detail as well as the mosquito noise).

as far as rule violations and all that go... don't stress. i find it best to give the poster the benefit of the doubt unless it's plainly obvious that the content is pirated (like "hey, i downloaded this movie...").

for example, it's not unheard of that special features needed desperately for a DVD release could be encoded in q2 or even q1 xvid, then sent internationally via ftp, or whatever's handy. this is completely legitimate (i'm not saying this happens all the time... quite the contrary in fact).

[Backwoods]

Originally posted by Mug Funky
for example, it's not unheard of that special features needed desperately for a DVD release could be encoded in q2 or even q1 xvid, then sent internationally via ftp, or whatever's handy. this is completely legitimate (i'm not saying this happens all the time... quite the contrary in fact).

I guess this is from experience?

[esby]

as far as rule violations and all that go... don't stress. i find it best to give the poster the benefit of the doubt unless it's plainly obvious that the content is pirated (like "hey, i downloaded this movie...").

I fully agree, but it does not hurt to remind where we are walking too.

Now I think the original question is like filtering raws, no matter the usage (dvd, avi etc.).

I don't know where fansubs belongs to, according to the rules.
Technically there are illegals, but tolerated.
But now, it has been one of the biggest troll ever seen...

And for my personnal experience about backwood quote, (in fansubs), I think that using this kind of solution is the last thing I want to do, since it means you have no or very little control on the guy who is encoding the material for you... And it is way easier to just have the vobs uploaded nowadays... Or to just order the dvd in japan and encode when you receive them (or more precisely, when you get scripts to encode with... :devil: )

esby

[Backwoods]

Yea, I would think an overnight shipping expense would be worth it rather than encoding material to Xvid then back to MPG2 for a commerical DVD. If I remember correctly Mug Funky works for a DVD house in PAL land and I hope he hasn't encountered this situation.

@esby
You visit SA?

[esby]

SA as?
What is is standing for?
It does not say anything to me...
Except maybe one of the war3 dota (custom map) heroes... but it's way out of context...
So I suppose it is either a real location (a place) or a virtual one... (eg: irc chat room, forums? or similar)...

esby

[Mug Funky]

I guess this is from experience?

thankfully no.

stuff does get sent around in xvid, but definitely not for putting on the final disc (i don't know of any occasions where this has happened). more for things like subtitling where we don't have any subs, and need someone who speaks the language (we don't just do english and japanese) to translate it. in these situations we either make a DVD-5 with burnt-in timecode, dub to VHS with timecodes, or send a video file.