puppeteer-lottie-cli
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How to generate from lottie json with no background
Even with -b "transparent" explicitly set, there is always a black background in the generated files. I know the background isn't embedded in the json, because I have also displayed the same files in lottie-react-native, and there is no background there.
I need to generate an mp4 from the lottie json, and then use ffmpeg to overlay the generated mp4 over another mp4 - but the lottie generated video has a large black background around it that covers the other video.
Do you have any tips for getting an mp4 out that has no background?
mp4 videos don't support transparency.
Your best bet is to output a series of transparent png images and use that "image-*.png" type pattern as your overlay input.
Yeah I realized the mistake in my thought process right after I posted. I tried to delete the issue but I guess they don't allow that. I was able to do the image series however
good issue! i have the same problem.
@transitive-bullshit u can use -vcodec png
filter in ffmpeg command
- puppeteer-lottie -i ruledme.json -o 'frame-%d.png' --width 1024
- ffmpeg -framerate 30 -i frame-%d.png -c:v gif -filter_complex "[0]split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" out.gif
- ffmpeg -framerate 30 -i frame-%d.png -c:v libvpx-vp9 -b:v 0 -pix_fmt yuva420p out.webm
I went with webm instead of gif, easier.