Can I give AVISynth a Dummy Video?

[smike]

I'm working on a complicated subtitle project and using Aegisub to do it. I can preview it with a dummy video in that program. I was hoping it was possible with AviSynth. Some combination with the AssRender filter hopefully.

[poisondeathray]

It depends on how you are using it specifically. But you can use blankclip()

[smike]

That worked perfectly. Thank you so much.

[jagabo]

You can specify the frame size, fps, and colorspace. in the arguments of BlankClip() (or ColorBars()). You may also find it useful to use ShowFrameNumber(), ShowTime(), or ShowSMPTE() to have that information stamped on each frame.

[smike]

Can I specify Opacity at all?

I overlayed it with the video for a test but since it's a black screen it gets in the way. I just want the words to be overlayed.

[poisondeathray]

I don't understand what you are doing.

Why don't you just use assrender or vsfilter or xy-vsfilter ? ie. directly as an overlay on the target video

But - yes you can use a "transparent" video with alpha channel

BlankClip(pixel_type="RGB32")
Mask(ShowAlpha())

But it will only be transparent in programs that can handle alpha channel, in other programs it will look "black"

There is also a function called masksub() which places subs onto a transparent video - people use this for subbing NLE's for example. See this thread:

https://forum.videohelp.com/threads/356192-How-to-add-in-Sony-Vegas-Pro-11-ass-srt-subs...=1#post2242837
https://forum.videohelp.com/threads/364265-Importing-SRT-subtitles-into-Premiere-Pro-CC...00#post2319000

[smike]

I was using AssRender but it won't work unless I use it with BlankClip.


I actually am using Vegas so I tried MaskSub but it's still showing up black, even with the tip of using the Alpha option in Vegas.

[poisondeathray]

To use masksub in vegas, you need to encode with a format that supports RGBA (for example, UT Video Codec, or Lagarith - the "A" is for alpha channel), and interpret the alpha within vegas (right click the clip => properties => alpha channel, select straight instead of "disabled" )

[smike]

Ah okay. That did it. Thanks for all your assistance.