diff --git a/pipi/sequence.c b/pipi/sequence.c
index 57034e1..e218352 100644
--- a/pipi/sequence.c
+++ b/pipi/sequence.c
@@ -91,9 +91,9 @@ pipi_sequence_t *pipi_open_sequence(char const *file,
              file);
     ff->fmt_ctx->filename[sizeof(ff->fmt_ctx->filename) - 1] = '\0';
 
-    ff->fmt_ctx->oformat = guess_format(NULL, file, NULL);
+    ff->fmt_ctx->oformat = av_guess_format(NULL, file, NULL);
     if (!ff->fmt_ctx->oformat)
-        ff->fmt_ctx->oformat = guess_format("mpeg", NULL, NULL);
+        ff->fmt_ctx->oformat = av_guess_format("mpeg", NULL, NULL);
     if (!ff->fmt_ctx->oformat)
         goto error;
 
@@ -115,12 +115,42 @@ pipi_sequence_t *pipi_open_sequence(char const *file,
     ff->cod_ctx->bit_rate = bitrate;
     ff->cod_ctx->time_base.num = 1;
     ff->cod_ctx->time_base.den = fps;
-    ff->cod_ctx->gop_size = fps * 3 / 4; /* empirical */
+
     ff->cod_ctx->pix_fmt = PIX_FMT_YUV420P; /* send YUV 420 */
     if (ff->cod_ctx->codec_id == CODEC_ID_MPEG2VIDEO)
         ff->cod_ctx->max_b_frames = 2;
     if (ff->cod_ctx->codec_id == CODEC_ID_MPEG1VIDEO)
         ff->cod_ctx->mb_decision = 2;
+    if (ff->cod_ctx->codec_id == CODEC_ID_H264)
+    {
+        /* Import x264 slow presets */
+        ff->cod_ctx->coder_type = 1;
+        ff->cod_ctx->flags |= CODEC_FLAG_LOOP_FILTER;
+        ff->cod_ctx->me_cmp |= FF_CMP_CHROMA;
+        ff->cod_ctx->partitions |= X264_PART_I4X4 | X264_PART_I8X8
+                                 | X264_PART_P4X4 | X264_PART_P8X8;
+        ff->cod_ctx->me_method = ME_UMH;
+        ff->cod_ctx->me_subpel_quality = 8;
+        ff->cod_ctx->me_range = 16;
+        ff->cod_ctx->gop_size = 250;
+        ff->cod_ctx->keyint_min = 25;
+        ff->cod_ctx->scenechange_threshold = 40;
+        ff->cod_ctx->i_quant_factor = 0.71f;
+        ff->cod_ctx->b_frame_strategy = 2;
+        ff->cod_ctx->qcompress = 0.6f;
+        ff->cod_ctx->qmin = 10;
+        ff->cod_ctx->qmax = 51;
+        ff->cod_ctx->max_qdiff = 4;
+        ff->cod_ctx->max_b_frames = 3;
+        ff->cod_ctx->refs = 5;
+        ff->cod_ctx->directpred = 3;
+        ff->cod_ctx->trellis = 1;
+        ff->cod_ctx->flags2 |= CODEC_FLAG2_BPYRAMID | CODEC_FLAG2_MIXED_REFS
+                             | CODEC_FLAG2_WPRED | CODEC_FLAG2_8X8DCT
+                             | CODEC_FLAG2_FASTPSKIP;
+        ff->cod_ctx->weighted_p_pred = 2;
+        ff->cod_ctx->rc_lookahead = 50;
+    }
     if (ff->fmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
         ff->cod_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;