Opened 10 years ago
Closed 10 years ago
#3299 closed enhancement (fixed)
Add the possibility to fade in / fade out text with drawtext
| Reported by: | slhck | Owned by: | |
|---|---|---|---|
| Priority: | wish | Component: | avfilter |
| Version: | unspecified | Keywords: | drawtext |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
The drawtext filter currently does not allow fading in or fading out of text. It'd be a useful feature to have, but at the moment, I think this can only be achieved by rendering ASS effects, pre-generating the subtitle text with ImageMagick (or something similar), or a super complex blend filter.
I could imagine that this is easily implemented with two additional options:
- fade in duration
- fade out duration
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This is possible since commit:
commit e9ff5df0b53076636082412f06bdd3b6aaa2b607 Author: Andrey Utkin <andrey.krieger.utkin@gmail.com> Date: Fri Jul 4 21:54:53 2014 +0300 lavfi/drawtext: add fontcolor_expr option Allow to dynamically evaluate the font color. Signed-off-by: Stefano Sabatini <stefasab@gmail.com>You need to set an expression for the fontcolor alpha component.