How can i forcing current frame to be encoded as intra frame using libavcodec

Question

I want to change gop dynamic to adapt to player. Smaller gop help for reduce first screen cost; Big gop help to reduce bitrate to save bandwidth.

I found nvenc has a function which can solve the problem above. https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-video-encoder-api-prog-guide/#forcing-current-frame-to-be-encoded-as-intra-frame

But I'm using ffmpeg. Is there any similar function in ffmpeg?

user_5726027 · Answer

If the AVFrame->pict_type is set to AV_PICTURE_TYPE_I, then the NVENC encoders, by default, will encode it as an intra frame. They also have a private option to force it as an IDR frame.

For the latter, add before opening the encoder.

av_opt_set(avctx->priv_data, "forced_idr", "1", 0);

How can i forcing current frame to be encoded as intra frame using libavcodec

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