Avisynth: Subtitle Fade in/Out

muaddib · #1 11-25-2002, 06:06 PM

Hi all!

I need some help with a simple task...
Is there a way to fade in a line of text into a movie, make it stay for a couple of seconds the fade it out?
I'm using the avs native subtitle() function, but it doesn’t fade in/out.

Any ideas?

Thanks,

muaddib · #2 11-28-2002, 01:31 AM

Well... I think I got it. Here is the script:

Quote:

source1 = mpeg2source("C:\Temp\cassia_eller\malandragem.d2v" )

subtitle1 = Subtitle(source1, "Malandragem", 465,390, 70,280, "arial",33,$FFFFFF,$000000)
subtitle2 = Subtitle(subtitle1, "(Cazuza/Frejat)", 465,414, 70,280, "arial",21,$FFFFFF,$000000)

sub_fadein = Dissolve(trim(source1,70,100), trim(subtitle2,70,280), 30)
sub_fadeout = Dissolve(sub_fadein, trim(source1,250,0), 30)

trim(source1,0,69) + sub_fadeout

This script FadeIn 2 text lines (1 sec fadein), show it for 5sec, then FadeOut (1sec fadeout).
I would like to make a function with it. The function should have the same arguments that the "subtitle" has, plus the fadein/out time and stay time.
But I never did any function with avs... can someone help me?

Graal_CPM · #3 11-28-2002, 04:16 AM

Hi!

Sorry I cannot help you. However, checking the script at http://www.avisynth.org/index.php?page=VirtualDub_II might help you to get an idea about functions.

Cheers,

muaddib · #4 11-29-2002, 01:08 AM

Quote:

Originally Posted by Graal_CPM

Hi!

Sorry I cannot help you. However, checking the script at http://www.avisynth.org/index.php?page=VirtualDub_II might help you to get an idea about functions.

Cheers,

Hi Graal_CPM!

Thanks for the link!
I made a function, and it works!
Here is the script:

Quote:

LoadPlugin("D:\DVD Rip Tools\AviSynth2\filters\mpeg2dec.dll")
mpeg2source("C:\Temp\cassia_eller\malandragem.d2v" )

FadeSub("Malandragem", 465,390, "arial",33,$FFFFFF,$000000, 3, 7, 1)
FadeSub("(Cazuza/Frejat)", 465,414, "arial",21,$FFFFFF,$000000, 3, 7, 1)

BilinearResize(448,448,24,16,672,44

clip3=AddBorders(16,16,16,16)

clip4=Dissolve(Blackness(clip3,60),clip3,60)
Dissolve(trim(clip4,0,7202),Blackness(clip3,250),1 50)

#----------------------#
# FadeSub Function #
#----------------------#
function FadeSub(clip clip, string "text", int "x", int "y", string "font", int "size",
\ int "text_color", int "halo_color", int "start", int "stay", int "fade")
{
framerate = 29.976
first_frame = round(framerate * start)
last_frame = round((framerate * stay) + first_frame)
fade_frames = round(framerate * fade)
fin_frame = fade_frames + first_frame
fout_frame = last_frame - fade_frames

solid_sub = Subtitle(clip, text, x, y, first_frame, last_frame, font, size, text_color, halo_color)
sub_fin = Dissolve(trim(clip, first_frame, fin_frame), trim(solid_sub, first_frame, last_frame), fade_frames)
sub_fout = Dissolve(sub_fin, trim(clip, fout_frame, 0), fade_frames)

return (trim(clip, 0, first_frame-1) + sub_fout)
}

But I have one problem. See the line that says "framerate = 29.976"? That line should not exist... cause framerate is a function that should return the framerate of the clip. Well, if I erase that line, AVS give me the message: I don't know what "framerate" means

Anyone know what I'm doing wrong?

Graal_CPM · #5 11-29-2002, 06:05 AM

Well, reading doc at http://www.avisynth.org I understand that synthax is "FRAMERATE(clip)", not FRAMERATE alone.

Very nice script indeed.

Cheers,

muaddib · #6 11-29-2002, 12:34 PM

Hey! Thanks again, Graal_CPM!
Now it's working.

I just changed the start, stay and fade variables to float, so you can use fraction of seconds.
I'm using this script to show the name of the music (and composer) of music-videos that are missing that information.

Quote:

#----------------------#
# FadeSub Function #
#----------------------#
function FadeSub(clip clip, string "text", int "x", int "y", string "font", int "size",
\ int "text_color", int "halo_color", float "start", float "stay", float "fade")
{
frame_rate = framerate(clip)
first_frame = round(frame_rate * start)
last_frame = round(first_frame + (frame_rate * stay))
fade_frames = round(frame_rate * fade)
fin_frame = fade_frames + first_frame
fout_frame = last_frame - fade_frames

solid_sub = Subtitle(clip, text, x, y, first_frame, last_frame, font, size, text_color, halo_color)
sub_fin = Dissolve(trim(clip, first_frame, fin_frame), trim(solid_sub, first_frame, last_frame), fade_frames)
sub_fout = Dissolve(sub_fin, trim(clip, fout_frame, 0), fade_frames)

return (trim(clip, 0, first_frame-1) + sub_fout)
}