RC_BITRATE_MODE: set BITS_EXCEEDED to iCurrentBitsLevel and allows QP adjust in RcCalculatePictureQp().
RC_BUFFERBASED_MODE: use buffer status to adjust the video quality, introduced in release 1.2. RC_TIMESTAMP_MODE: bit rate control based on timestamp, introduced in release 1.4. Default to use RC_QUALITY_MODE. Signed-off-by: Linjie Fu <linjie...@intel.com> --- libavcodec/libopenh264enc.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/libavcodec/libopenh264enc.c b/libavcodec/libopenh264enc.c index 0951412..93d3de2 100644 --- a/libavcodec/libopenh264enc.c +++ b/libavcodec/libopenh264enc.c @@ -49,6 +49,9 @@ typedef struct SVCContext { int skip_frames; int skipped; int cabac; + + // rate control mode + int rc_mode; } SVCContext; #define OFFSET(x) offsetof(SVCContext, x) @@ -73,6 +76,18 @@ static const AVOption options[] = { { "max_nal_size", "set maximum NAL size in bytes", OFFSET(max_nal_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE }, { "allow_skip_frames", "allow skipping frames to hit the target bitrate", OFFSET(skip_frames), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, { "cabac", "Enable cabac", OFFSET(cabac), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, + + { "rc_mode", "Select rate control mode", OFFSET(rc_mode), AV_OPT_TYPE_INT, { .i64 = RC_QUALITY_MODE }, RC_OFF_MODE, RC_TIMESTAMP_MODE, VE, "rc_mode" }, + { "off", "bit rate control off", 0, AV_OPT_TYPE_CONST, { .i64 = RC_OFF_MODE }, 0, 0, VE, "rc_mode" }, + { "quality", "quality mode", 0, AV_OPT_TYPE_CONST, { .i64 = RC_QUALITY_MODE }, 0, 0, VE, "rc_mode" }, + { "bitrate", "bitrate mode", 0, AV_OPT_TYPE_CONST, { .i64 = RC_BITRATE_MODE }, 0, 0, VE, "rc_mode" }, +#if OPENH264_VER_AT_LEAST(1, 2) + { "buffer", "using buffer status to adjust the video quality (no bitrate control)", 0, AV_OPT_TYPE_CONST, { .i64 = RC_BUFFERBASED_MODE }, 0, 0, VE, "rc_mode" }, +#endif +#if OPENH264_VER_AT_LEAST(1, 4) + { "timestamp", "bit rate control based on timestamp", 0, AV_OPT_TYPE_CONST, { .i64 = RC_TIMESTAMP_MODE }, 0, 0, VE, "rc_mode" }, +#endif + { NULL } }; -- 2.7.4 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".