Someone

    /* Allocate mcdeint specific buffers */
    if( pv->mcdeint_mode >= 0 )
    {
        avcodec_init();
        avcodec_register_all();
        
        AVCodec * enc = avcodec_find_encoder( CODEC_ID_SNOW );
        
        int i;
        for (i = 0; i < 3; i++ )
        {
            AVCodecContext * avctx_enc;
            
            avctx_enc = pv->mcdeint_avctx_enc = avcodec_alloc_context();
            
            avctx_enc->width                    = width;
            avctx_enc->height                   = height;
            avctx_enc->time_base                = (AVRational){1,25};  // meaningless
            avctx_enc->gop_size                 = 300;
            avctx_enc->max_b_frames             = 0;
            avctx_enc->pix_fmt                  = PIX_FMT_YUV420P;
            avctx_enc->flags                    = CODEC_FLAG_QSCALE | CODEC_FLAG_LOW_DELAY;
            avctx_enc->strict_std_compliance    = FF_COMPLIANCE_EXPERIMENTAL;
            avctx_enc->global_quality           = 1;
            avctx_enc->flags2                   = CODEC_FLAG2_MEMC_ONLY;
            avctx_enc->me_cmp                   = FF_CMP_SAD; //SSE;
            avctx_enc->me_sub_cmp               = FF_CMP_SAD; //SSE;
            avctx_enc->mb_cmp                   = FF_CMP_SSE;
            
            switch( pv->mcdeint_mode )
            {
                case 3:
                    avctx_enc->refs = 3;
                case 2:
                    avctx_enc->me_method = ME_ITER;
                case 1:
                    avctx_enc->flags |= CODEC_FLAG_4MV;
                    avctx_enc->dia_size =2;
                case 0:
                    avctx_enc->flags |= CODEC_FLAG_QPEL;
            }
            
            avcodec_open(avctx_enc, enc);        
        }
        
        pv->mcdeint_frame       = avcodec_alloc_frame();
        pv->mcdeint_outbuf_size = width * height * 10;
        pv->mcdeint_outbuf      = malloc( pv->mcdeint_outbuf_size );
    }