printf("this codec is under development, files encoded with it wont be decodeable with future versions!!!\n"
av_log(avctx, AV_LOG_ERROR, "this codec is under development, files encoded with it wont be decodeable with future versions!!!\n"
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){    FFV1Context *f = avctx->priv_data;    CABACContext * const c= &f->c;    AVFrame *pict = data;    const int width= f->width;    const int height= f->height;    AVFrame * const p= &f->picture;    int used_count= 0;    if(avctx->strict_std_compliance >= 0){        printf("this codec is under development, files encoded with it wont be decodeable with future versions!!!\n"               "use vstrict=-1 to use it anyway\n");        return -1;    }            ff_init_cabac_encoder(c, buf, buf_size);    ff_init_cabac_states(c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64);        *p = *pict;    p->pict_type= FF_I_TYPE;        if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){        put_cabac_bypass(c, 1);        p->key_frame= 1;        write_header(f);        clear_state(f);    }else{        put_cabac_bypass(c, 0);        p->key_frame= 0;    }    if(!f->ac){        used_count += put_cabac_terminate(c, 1);//printf("pos=%d\n", used_count);        init_put_bits(&f->pb, buf + used_count, buf_size - used_count);    }        if(f->colorspace==0){        const int chroma_width = -((-width )>>f->chroma_h_shift);        const int chroma_height= -((-height)>>f->chroma_v_shift);        encode_plane(f, p->data[0], width, height, p->linesize[0], 0);        encode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1);        encode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1);    }else{        encode_rgb_frame(f, (uint32_t*)(p->data[0]), width, height, p->linesize[0]/4);    }    emms_c();        f->picture_number++;    if(f->ac){        return put_cabac_terminate(c, 1);    }else{        flush_put_bits(&f->pb); //nicer padding FIXME        return used_count + (get_bit_count(&f->pb)+7)/8;    }}