Adding noise?

[frankiejb59]

hello. I'm getting quite competent add editing with avisynth . I am currently nedding to make a film look and sound old as in 1920's I've seen plenty of articles on cleaning up video and audio but nothing on doing the reverse. I fugured by lowing bandwith, sample rates and bitrate i can adda hiss and make audio sound tinny as it used to but i need to add things like rumbling, humming, popping and scratches to the audio randomly. I also want to add effects like film burns, projecter scratches , bits and random noise to the video. has anyone devised a way of doing this? Thank you.

[ChaosKing]

Have a look at: http://avisynth.org/mediawiki/External_filters#Effects

[Lyris]

Don't lower the bit-rate. Digital audio compression was not around in the 1920s :)

[TheSkiller]

Here (http://forum.doom9.org/showthread.php?p=1248781#post1248781) is a very nice function that creates an old film look.
For the audio, the only thing I can think of is Nero WaveEditor. It can add clicks and stuff like that.

Don't reduce the bitrate, film does not exhibit any compression artefacts since it's stored on...well film.

[Mug Funky]

i used to use a 16mm "scratch loop" for this purpose.

it was made by splicing a length of clear 16mm film into a loop that fit on my old Ursa telecine (so it could go round and round indefinitely), then abusing it with pliers while it was running, then stomping on it, grinding my foot into it, thumb-printing it, etc, then transferring it in low contrast and capturing the result.

if i ever find it in my backups, maybe i'll release it as creative-commons? it's served me well and didn't cost anything...

[edit]

on the audio front, you'll need to lowpass it and highpass it.

perhaps dub it out to a cassette and give it a couple of runs on hi-speed dub?

then mix it in with loops of vinyl lead-in and lead-out?

you can do all this digitally, but where's the fun in that, honestly?

[Lyris]

Another option is to run a scratch removal pass (search the forum for SremoveDirtMC) on a video transfer of a scratchy/dirty film.

Then, use AviSynth's "Subtract" command to compare the source and the de-scratched result to the original.


Input=MPEG2source("Scratchydvd.d2v")
processed = input.SremovedirtMC(15) #15 being the severity of the scratch removal process
sub = input.subtract(processed)
substrong = sub.levels(122,1,132,0,255)
return substrong



That would give you a video clip with (mostly) only dirt and scratches which you could then luma-key over your footage.

Hmmm.. I wonder if anyone has ever sued someone for 'stealing' the dirt and scratches from a copyrighted film :P

[StainlessS]

Take a look here about VirtualDub MSU "Old Cinema":-

http://forum.doom9.org/showthread.php?t=96122
http://forum.doom9.org/showthread.php?t=152579

May not work in Avisynth properly as noted in 2nd link,
may though in VD, think it worked pretty
good when I tried it. Perhaps there is a later
release.

[frankiejb59]

Don't lower the bit-rate. Digital audio compression was not around in the 1920s :)

I lower the bandwidth though and I tried to convert to 8 bit but if i go too far there's a high pitched debris around the top end so i have to be careful.

[frankiejb59]

i used to use a 16mm "scratch loop" for this purpose.

it was made by splicing a length of clear 16mm film into a loop that fit on my old Ursa telecine (so it could go round and round indefinitely), then abusing it with pliers while it was running, then stomping on it, grinding my foot into it, thumb-printing it, etc, then transferring it in low contrast and capturing the result.

if i ever find it in my backups, maybe i'll release it as creative-commons? it's served me well and didn't cost anything...

[edit]

on the audio front, you'll need to lowpass it and highpass it.

perhaps dub it out to a cassette and give it a couple of runs on hi-speed dub?

then mix it in with loops of vinyl lead-in and lead-out?

you can do all this digitally, but where's the fun in that, honestly?

I saw something similar on a video tutorial which worked nice for a few seconds but don't you find the looparpund gets repetative?

[frankiejb59]

i used to use a 16mm "scratch loop" for this purpose.

it was made by splicing a length of clear 16mm film into a loop that fit on my old Ursa telecine (so it could go round and round indefinitely), then abusing it with pliers while it was running, then stomping on it, grinding my foot into it, thumb-printing it, etc, then transferring it in low contrast and capturing the result.

if i ever find it in my backups, maybe i'll release it as creative-commons? it's served me well and didn't cost anything...

[edit]

It helps if I read the full post before replying. :)


on the audio front, you'll need to lowpass it and highpass it.



I did that by narrowing the bandwidth of the audio track (same effect I know) and if i did it just right then it would sound like an old caruso recording :) Still too clean though.


perhaps dub it out to a cassette and give it a couple of runs on hi-speed dub?

then mix it in with loops of vinyl lead-in and lead-out?

you can do all this digitally, but where's the fun in that, honestly?

I believe you. I still have a tape deck and and record deck somewhere. I used to have areel to reel but that's gone, sadly. I have some old cassetes to which have gained dust over the years. I like you idea about looping the lead in and i I narrow the bandwidth it could be fooled into sounding like gramaphone. There is a slight problem which i could very likely work around but the soundtrack is over an hour long. perhaps i could track it to video tape or use audio tape and creative splicing.

[frankiejb59]

Take a look here about VirtualDub MSU "Old Cinema":-

http://forum.doom9.org/showthread.php?t=96122
http://forum.doom9.org/showthread.php?t=152579

May not work in Avisynth properly as noted in 2nd link,
may though in VD, think it worked pretty
good when I tried it. Perhaps there is a later
release.

Not a problem. I don't mind doing some of the effects in virtualdubmod.