Javacv: How do I specify a GPU card to decode if i have two GPU card ?

[yangqx]

I konwn ,ffmpeg -hwaccel cuvid -hwaccel_device 0 -c:v h264_cuvid -i demo.flv ...
I want to use FFmpegFrameGrabber .
I've tried, setOption("hwaccel_device", "1"); or setVideoOption("hwaccel_device", "1"); and so on
but it had no effect at all.

[saudet]

That sounds like a question about FFmpeg?
You'll probably find the answer in their documentation:
https://ffmpeg.org/documentation.html

[yangqx]

That sounds like a question about FFmpeg?
You'll probably find the answer in their documentation:
https://ffmpeg.org/documentation.html
I want to use javaCV，how to set ? Thank u

[yaoshuyu]

That sounds like a question about FFmpeg?
You'll probably find the answer in their documentation:
https://ffmpeg.org/documentation.html

We have already read the #1142, #1134, and read the document on ffmpeg.org, but setOption(“hwaccel_device”，“1”) doesn't work.

[saudet]

Maybe we need to set it some other way. Someone will need to figure this out. I don't have this information at the moment.

[yaoshuyu]

Please keep an eye on this issue, it's very useful to us.
And I have another doubt. How does javacv implement instruction mapping and why can some instructions like setVideoOption("hwaccel", "cuvid") can be set successfully?

[saudet]

The ffmpeg program doesn't map directly all the options that way. Maybe something like setVideoOption("device"，"1") works, I don't know. The only way to know for sure is to read the source code of the ffmpeg program.

[samegit]

You can try this
setVideoCodecName("h264_cuvid");
setVideoOption("gpu", "1");

[yangqx]

You can try this
setVideoCodecName("h264_cuvid");
setVideoOption("gpu", "1");

It is work for me . Thank you very much!

[yaoshuyu]

You can try this
setVideoCodecName("h264_cuvid");
setVideoOption("gpu", "1");

This parameter can be used, you really helped us a lot. Thank you very much!