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ffmpegwebmhevc
Alexander BC
Alexander BC

Reputation: 160

Cannot get transparent background with ffmpeg (HEVC to VP8/VP9)

I want to convert a mp4 video to any other format that supports video-transparency. I've done it in the past but I cannot get it to work again.

I've followed the same guides as before:

The input video is a HEVC (h265), and the background I want to remove is full white. I'm using the following command to make the conversion:

ffmpeg -i input.mp4 -c:v libvpx -b:v 4M -vf "colorkey=0xffffff:0.1:0.0,format=yuva420p" -auto-alt-ref 0 transparent.webm

I've also tried with VP9 (libvpx-vp9) with same result. The conversion of a single frame from a PNG source (screen captured frame) works ok.

Any idea about where I could be failing in?

I hope there's nothing missing, thanks in advance.

PS I'm getting a warning at the transcode process, I don't think is anything important but here it's in case is something relevant: [swscaler @ 000001e3b0dc7a40] No accelerated colorspace conversion found from yuv420p to argb.

Upvotes: 1

Views: 3726

Answers (1)

Alexander BC
Alexander BC

Reputation: 160

Ok, the error was on the video player (VLC) seems that VLC does not support video transparency. On the browser it's correctly displayed with the transparent background.

Upvotes: 5

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