diff -Naurp a/configure b/configure
--- a/configure	2018-07-18 13:51:59.000000000 +0000
+++ b/configure	2018-08-10 21:09:52.000000000 +0000
@@ -6043,7 +6043,7 @@ enabled libtwolame        && require lib
                                die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
 enabled libv4l2           && require_pkg_config libv4l2 libv4l2 libv4l2.h v4l2_ioctl
 enabled libvidstab        && require_pkg_config libvidstab "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
-enabled libvmaf           && require_pkg_config libvmaf "libvmaf >= 0.6.2" libvmaf.h compute_vmaf
+enabled libvmaf           && require_pkg_config libvmaf "libvmaf >= 1.3.9" libvmaf.h compute_vmaf
 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
 enabled libvorbis         && require_pkg_config libvorbis vorbis vorbis/codec.h vorbis_info_init &&
                              require_pkg_config libvorbisenc vorbisenc vorbis/vorbisenc.h vorbis_encode_init
diff -Naurp a/doc/filters.texi b/doc/filters.texi
--- a/doc/filters.texi	2018-07-18 13:51:59.000000000 +0000
+++ b/doc/filters.texi	2018-08-10 21:09:52.000000000 +0000
@@ -10425,7 +10425,7 @@ The obtained VMAF score is printed throu
 
 It requires Netflix's vmaf library (libvmaf) as a pre-requisite.
 After installing the library it can be enabled using:
-@code{./configure --enable-libvmaf}.
+@code{./configure --enable-libvmaf --enable-version3}.
 If no model path is specified it uses the default model: @code{vmaf_v0.6.1.pkl}.
 
 The filter has following options:
@@ -10459,6 +10459,15 @@ Enables computing ms_ssim along with vma
 
 @item pool
 Set the pool method (mean, min or harmonic mean) to be used for computing vmaf.
+
+@item n_threads
+Set number of threads to be used when computing vmaf.
+
+@item n_subsample
+Set interval for frame subsampling used when computing vmaf.
+
+@item enable_conf_interval
+Enables confidence interval.
 @end table
 
 This filter also supports the @ref{framesync} options.
diff -Naurp a/libavfilter/vf_libvmaf.c b/libavfilter/vf_libvmaf.c
--- a/libavfilter/vf_libvmaf.c	2018-07-18 13:52:01.000000000 +0000
+++ b/libavfilter/vf_libvmaf.c	2018-08-10 21:09:52.000000000 +0000
@@ -61,6 +61,9 @@ typedef struct LIBVMAFContext {
     int ssim;
     int ms_ssim;
     char *pool;
+    int n_threads;
+    int n_subsample;
+    int enable_conf_interval;
     int error;
 } LIBVMAFContext;
 
@@ -77,6 +80,9 @@ static const AVOption libvmaf_options[]
     {"ssim",  "Enables computing ssim along with vmaf.",                                OFFSET(ssim), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
     {"ms_ssim",  "Enables computing ms-ssim along with vmaf.",                          OFFSET(ms_ssim), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
     {"pool",  "Set the pool method to be used for computing vmaf.",                     OFFSET(pool), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, FLAGS},
+    {"n_threads", "Set number of threads to be used when computing vmaf.",              OFFSET(n_threads), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT_MAX, FLAGS},
+    {"n_subsample", "Set interval for frame subsampling used when computing vmaf.",     OFFSET(n_subsample), AV_OPT_TYPE_INT, {.i64=1}, 1, UINT_MAX, FLAGS},
+    {"enable_conf_interval",  "Enables confidence interval.",                           OFFSET(enable_conf_interval), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
     { NULL }
 };
 
@@ -165,7 +171,8 @@ static void compute_vmaf_score(LIBVMAFCo
                             read_frame, s, s->model_path, s->log_path,
                             s->log_fmt, 0, 0, s->enable_transform,
                             s->phone_model, s->psnr, s->ssim,
-                            s->ms_ssim, s->pool);
+                            s->ms_ssim, s->pool,
+                            s->n_threads, s->n_subsample, s->enable_conf_interval);
 }
 
 static void *call_vmaf(void *ctx)