int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
                                              AVPacket *avpkt,
                                              const AVFrame *frame,
                                              int *got_packet_ptr)
{
    int ret;
    int user_packet = !!avpkt->data;

    *got_packet_ptr = 0;

    if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
        av_free_packet(avpkt);
        av_init_packet(avpkt);
        avpkt->size     = 0;
        return 0;
    }

    if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
        return AVERROR(EINVAL);

    av_assert0(avctx->codec->encode2);

    ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
    if (!ret) {
        if (!*got_packet_ptr)
            avpkt->size = 0;
        else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
            avpkt->pts = avpkt->dts = frame->pts;

        if (!user_packet && avpkt->size) {
            uint8_t *new_data = av_realloc(avpkt->data, avpkt->size);
            if (new_data)
                avpkt->data = new_data;
        }

        avctx->frame_number++;
    }

    if (ret < 0 || !*got_packet_ptr)
        av_free_packet(avpkt);

    emms_c();
    return ret;
}