avctx->coded_frame = (AVPicture*)avctx->priv_data;
avctx->coded_frame = (AVFrame *)avctx->priv_data;
static int raw_init_encoder(AVCodecContext *avctx){    avctx->coded_frame = (AVPicture*)avctx->priv_data;    avctx->coded_frame->pict_type = FF_I_TYPE;    avctx->coded_frame->key_frame = 1;    avctx->codec_tag = findFourCC(avctx->pix_fmt);    return 0;}