+#define OFFSET(x) offsetof(VP8Context, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+
+static const AVOption options[]={
+ { "cpu-used", "Quality/Speed ratio modifier", OFFSET(cpu_used), FF_OPT_TYPE_INT, {INT_MIN}, INT_MIN, INT_MAX, VE},
+ { "auto-alt-ref", "Enable use of alternate reference "
+ "frames (2-pass only)", OFFSET(auto_alt_ref), FF_OPT_TYPE_INT, {-1}, -1, 1, VE},
+ { "lag-in-frames", "Number of frames to look ahead for "
+ "alternate reference frame selection", OFFSET(lag_in_frames), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX, VE},
+ { "arnr-maxframes", "altref noise reduction max frame count", OFFSET(arnr_max_frames), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX, VE},
+ { "arnr-strength", "altref noise reduction filter strength", OFFSET(arnr_strength), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX, VE},
+ { "arnr-type", "altref noise reduction filter type", OFFSET(arnr_type), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX, VE, "arnr_type"},
+ { "backward", NULL, 0, FF_OPT_TYPE_CONST, {1}, 0, 0, VE, "arnr_type" },
+ { "forward", NULL, 0, FF_OPT_TYPE_CONST, {2}, 0, 0, VE, "arnr_type" },
+ { "centered", NULL, 0, FF_OPT_TYPE_CONST, {3}, 0, 0, VE, "arnr_type" },
+ { "deadline", "Time to spend encoding, in microseconds.", OFFSET(deadline), FF_OPT_TYPE_INT, {VPX_DL_GOOD_QUALITY}, INT_MIN, INT_MAX, VE, "quality"},
+ { "best", NULL, 0, FF_OPT_TYPE_CONST, {VPX_DL_BEST_QUALITY}, 0, 0, VE, "quality"},
+ { "good", NULL, 0, FF_OPT_TYPE_CONST, {VPX_DL_GOOD_QUALITY}, 0, 0, VE, "quality"},
+ { "realtime", NULL, 0, FF_OPT_TYPE_CONST, {VPX_DL_REALTIME}, 0, 0, VE, "quality"},
+ { "error-resilient", "Error resilience configuration", OFFSET(error_resilient), FF_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, VE, "er"},
+#ifdef VPX_ERROR_RESILIENT_DEFAULT
+ { "default", "Improve resiliency against losses of whole frames", 0, FF_OPT_TYPE_CONST, {VPX_ERROR_RESILIENT_DEFAULT}, 0, 0, VE, "er"},
+ { "partitions", "The frame partitions are independently decodable "
+ "by the bool decoder, meaning that partitions can be decoded even "
+ "though earlier partitions have been lost. Note that intra predicition"
+ " is still done over the partition boundary.", 0, FF_OPT_TYPE_CONST, {VPX_ERROR_RESILIENT_PARTITIONS}, 0, 0, VE, "er"},
+#endif
+{"speed", "", offsetof(VP8Context, cpu_used), FF_OPT_TYPE_INT, {.dbl = 3}, -16, 16, VE},
+{"quality", "", offsetof(VP8Context, deadline), FF_OPT_TYPE_INT, {.dbl = VPX_DL_GOOD_QUALITY}, INT_MIN, INT_MAX, VE, "quality"},
+{"best", NULL, 0, FF_OPT_TYPE_CONST, {.dbl = VPX_DL_BEST_QUALITY}, INT_MIN, INT_MAX, VE, "quality"},
+{"good", NULL, 0, FF_OPT_TYPE_CONST, {.dbl = VPX_DL_GOOD_QUALITY}, INT_MIN, INT_MAX, VE, "quality"},
+{"realtime", NULL, 0, FF_OPT_TYPE_CONST, {.dbl = VPX_DL_REALTIME}, INT_MIN, INT_MAX, VE, "quality"},
+{"arnr_max_frames", "altref noise reduction max frame count", offsetof(VP8Context, arnr_max_frames), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 15, VE},
+{"arnr_strength", "altref noise reduction filter strength", offsetof(VP8Context, arnr_strength), FF_OPT_TYPE_INT, {.dbl = 3}, 0, 6, VE},
+{"arnr_type", "altref noise reduction filter type", offsetof(VP8Context, arnr_type), FF_OPT_TYPE_INT, {.dbl = 3}, 1, 3, VE},
+#if FF_API_X264_GLOBAL_OPTS
+{"rc_lookahead", "Number of frames to look ahead for alternate reference frame selection", offsetof(VP8Context, lag_in_frames), FF_OPT_TYPE_INT, {.dbl = -1}, -1, 25, VE},
+{"crf", "Select the quality for constant quality mode", offsetof(VP8Context, crf), FF_OPT_TYPE_INT, {.dbl = -1}, -1, 63, VE},
+#else
+{"rc_lookahead", "Number of frames to look ahead for alternate reference frame selection", offsetof(VP8Context, lag_in_frames), FF_OPT_TYPE_INT, {.dbl = 25}, 0, 25, VE},
+{"crf", "Select the quality for constant quality mode", offsetof(VP8Context, crf), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 63, VE},
+#endif
+{NULL}
+};
+
+static const AVClass class = {
+ .class_name = "libvpx encoder",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVCodecDefault defaults[] = {
+ { "qmin", "-1" },
+ { "qmax", "-1" },
+ { "g", "-1" },
+ { "keyint_min", "-1" },
+ { NULL },
+};
+