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Set default qmax for VC-3/DNxHD to 1024 (maximum allowed by VC-3 spec). 

Also increase the global limit on qmax.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Joseph Artsimovich 2012-02-07 15:47:23 +00:00 committed by Michael Niedermayer
parent bf5c0308f2
commit 950930b461
2 changed files with 8 additions and 1 deletions
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7
libavcodec/dnxhdenc.c
View File

@ -32,6 +32,7 @@
#include "mpegvideo.h"
#include "mpegvideo_common.h"
#include "dnxhdenc.h"
#include "internal.h"
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
#define DNX10BIT_QMAT_SHIFT 18 // The largest value that will not lead to overflow for 10bit samples.
@ -990,6 +991,11 @@ static int dnxhd_encode_end(AVCodecContext *avctx)
return 0;
}
static const AVCodecDefault dnxhd_defaults[] = {
{ "qmax", "1024" }, /* Maximum quantization scale factor allowed for VC-3 */
{ NULL },
};
AVCodec ff_dnxhd_encoder = {
.name = "dnxhd",
.type = AVMEDIA_TYPE_VIDEO,
@ -1002,4 +1008,5 @@ AVCodec ff_dnxhd_encoder = {
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_YUV422P10, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
.priv_class = &class,
.defaults = dnxhd_defaults,
};

2
libavcodec/options.c
View File

@ -133,7 +133,7 @@ static const AVOption options[]={
{"qcomp", "video quantizer scale compression (VBR)", OFFSET(qcompress), AV_OPT_TYPE_FLOAT, {.dbl = 0.5 }, -FLT_MAX, FLT_MAX, V|E},
{"qblur", "video quantizer scale blur (VBR)", OFFSET(qblur), AV_OPT_TYPE_FLOAT, {.dbl = 0.5 }, -1, FLT_MAX, V|E},
{"qmin", "min video quantizer scale (VBR)", OFFSET(qmin), AV_OPT_TYPE_INT, {.dbl = 2 }, -1, 69, V|E},
{"qmax", "max video quantizer scale (VBR)", OFFSET(qmax), AV_OPT_TYPE_INT, {.dbl = 31 }, -1, 69, V|E},
{"qmax", "max video quantizer scale (VBR)", OFFSET(qmax), AV_OPT_TYPE_INT, {.dbl = 31 }, -1, 1024, V|E},
{"qdiff", "max difference between the quantizer scale (VBR)", OFFSET(max_qdiff), AV_OPT_TYPE_INT, {.dbl = 3 }, INT_MIN, INT_MAX, V|E},
{"bf", "use 'frames' B frames", OFFSET(max_b_frames), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, -1, FF_MAX_B_FRAMES, V|E},
{"b_qfactor", "qp factor between p and b frames", OFFSET(b_quant_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1.25 }, -FLT_MAX, FLT_MAX, V|E},