@@ -1641,6 +1641,7 @@ means unlimited.
@table @option
@item auto-alt-ref
Enable use of alternate reference frames (2-pass only).
+Values greater than 1 enable multi-layer alternate reference frames (VP9 only).
@item arnr-max-frames
Set altref noise reduction max frame count.
@item arnr-type
@@ -1067,8 +1067,6 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt,
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
#define COMMON_OPTIONS \
- { "auto-alt-ref", "Enable use of alternate reference " \
- "frames (2-pass only)", OFFSET(auto_alt_ref), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 2, VE}, \
{ "lag-in-frames", "Number of frames to look ahead for " \
"alternate reference frame selection", OFFSET(lag_in_frames), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE}, \
{ "arnr-maxframes", "altref noise reduction max frame count", OFFSET(arnr_max_frames), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE}, \
@@ -1112,6 +1110,8 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt,
#if CONFIG_LIBVPX_VP8_ENCODER
static const AVOption vp8_options[] = {
COMMON_OPTIONS
+ { "auto-alt-ref", "Enable use of alternate reference "
+ "frames (2-pass only)", OFFSET(auto_alt_ref), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 2, VE},
{ "cpu-used", "Quality/Speed ratio modifier", OFFSET(cpu_used), AV_OPT_TYPE_INT, {.i64 = 1}, -16, 16, VE},
LEGACY_OPTIONS
{ NULL }
@@ -1121,6 +1121,8 @@ static const AVOption vp8_options[] = {
#if CONFIG_LIBVPX_VP9_ENCODER
static const AVOption vp9_options[] = {
COMMON_OPTIONS
+ { "auto-alt-ref", "Enable use of alternate reference "
+ "frames (2-pass only)", OFFSET(auto_alt_ref), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
{ "cpu-used", "Quality/Speed ratio modifier", OFFSET(cpu_used), AV_OPT_TYPE_INT, {.i64 = 1}, -8, 8, VE},
{ "lossless", "Lossless mode", OFFSET(lossless), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE},
{ "tile-columns", "Number of tile columns to use, log2", OFFSET(tile_columns), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
vp9 now supports [0, 6] Signed-off-by: James Zern <jzern@google.com> --- doc/encoders.texi | 1 + libavcodec/libvpxenc.c | 6 ++++-- 2 files changed, 5 insertions(+), 2 deletions(-)