{"global_header", "place global headers in extradata instead of every keyframe", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_GLOBAL_HEADER }, INT_MIN, INT_MAX, V|A|E, "flags"},
{"aggressive", "consider things that a sane encoder shouldnt do as an error", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_AGGRESSIVE }, INT_MIN, INT_MAX, A|V|D, "err_detect"},
{"rc_init_occupancy", "number of bits which should be loaded into the rc buffer before decoding starts", OFFSET(rc_initial_buffer_occupancy), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
-{"bpyramid", "allows B-frames to be used as references for predicting", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_BPYRAMID }, INT_MIN, INT_MAX, V|E, "flags2"},
-{"mixed_refs", "one reference per partition, as opposed to one reference per macroblock", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_MIXED_REFS }, INT_MIN, INT_MAX, V|E, "flags2"},
{"sc_factor", "multiplied by qscale for each frame and added to scene_change_score", OFFSET(scenechange_factor), AV_OPT_TYPE_INT, {.dbl = 6 }, 0, INT_MAX, V|E},