'FFMPEG: create a transparent background with lavfi?
I can create a transparent background using lavfi by setting colorkey - but that gives problems with edges around fonts, etc.
ffmpeg.exe -y -f lavfi -i color=s=1920x1080:color=0xff0000
-an -vf "ass=test.ass,colorkey=0xff0000:0.5:0.5,format=yuva420p"
-c:v png -t "00:01:40.544" -threads 0 "video.mov" -stats
How can I set the background to just transparent without resorting to colorkey?
Solution 1:[1]
Actually, @aergistal was almost there, but everything needed to be wrapped in one filter line, instead of two.
In other words, if you want to generate a transparent background, you have to specify the format filter already during the creation of the input – you cannot add it later.
So my winning combination was:
ffmpeg.exe -y -f lavfi -i
"[email protected]:size=1920x1080,format=rgba,
subtitles=test.ass:alpha=1" -c:v png
-t "00:01:00.000" -threads 0 "video.mov" -stats
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | slhck |