src/main/java/org/jcodec/codecs/h264/H264Encoder.java
public ByteBuffer encodeIDRFrame(Picture pic, ByteBuffer _out) {
        frameNumber = 0;
        return doEncodeFrame(pic, _out, true, frameNumber, SliceType.I);
    }
public ByteBuffer encodeIDRFrame(Picture pic, ByteBuffer _out) {
        frameNumber = 0;
        return doEncodeFrame(pic, _out, true, frameNumber, SliceType.I);
    }
Encode this picture as an IDR frame. IDR frame starts a new independently
decodeable video sequence

@param pic
@param _out
@return