avcodec/dvenc: Change quantizer dead zone default to 7

This improves the quality and reduces the "blocking" in flat areas
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/dvenc.c

@@ -756,7 +756,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 #define OFFSET(x) offsetof(DVVideoContext, x)
 static const AVOption dv_options[] = {
-    { "quant_deadzone",        "Quantizer dead zone",    OFFSET(quant_deadzone),       AV_OPT_TYPE_INT, { .i64 = 15 }, 0, 1024, VE },
+    { "quant_deadzone",        "Quantizer dead zone",    OFFSET(quant_deadzone),       AV_OPT_TYPE_INT, { .i64 = 7 }, 0, 1024, VE },
     { NULL },
 };
 

tests/ref/lavf/dv_fmt

-5a622e1ae4fd16bec59cd514380d7882 *./tests/data/lavf/lavf.dv
+7830f9c6716ceb6011f865f1e521b951 *./tests/data/lavf/lavf.dv
 3600000 ./tests/data/lavf/lavf.dv
-./tests/data/lavf/lavf.dv CRC=0x0a6edbd8
-155e8fd4ea1196edd56ae9ff09edcf85 *./tests/data/lavf/lavf.dv
+./tests/data/lavf/lavf.dv CRC=0xd428d3ee
+5569626370c7c72d40de2c4559e32856 *./tests/data/lavf/lavf.dv
 3480000 ./tests/data/lavf/lavf.dv
-./tests/data/lavf/lavf.dv CRC=0x3e5583fa
-87d3b20f656235671383a7eaa2f66330 *./tests/data/lavf/lavf.dv
+./tests/data/lavf/lavf.dv CRC=0xa0088163
+2fb332aab8f2ba9c33b1b2368194392a *./tests/data/lavf/lavf.dv
 3600000 ./tests/data/lavf/lavf.dv
-./tests/data/lavf/lavf.dv CRC=0xf3e6873c
+./tests/data/lavf/lavf.dv CRC=0xbdaf7f52

tests/ref/vsynth/vsynth1-dv

-4d572f758b55a1756adf9f54132f3b9e *tests/data/fate/vsynth1-dv.dv
+4246668d61439617101d051d7a995108 *tests/data/fate/vsynth1-dv.dv
 7200000 tests/data/fate/vsynth1-dv.dv
-1cda5a62c3a2f17cc7d5b4cddccf2524 *tests/data/fate/vsynth1-dv.out.rawvideo
+d52e7a9eac459ade9561d0b89bba58e7 *tests/data/fate/vsynth1-dv.out.rawvideo
 stddev:    6.90 PSNR: 31.34 MAXDIFF:   76 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth1-dv-411

-f179899efba432c6f01149c36c709092 *tests/data/fate/vsynth1-dv-411.dv
+df067afe65f1712d9e8efa7117aab6ea *tests/data/fate/vsynth1-dv-411.dv
 7200000 tests/data/fate/vsynth1-dv-411.dv
-48904744fabbbc3421a762f615ef6456 *tests/data/fate/vsynth1-dv-411.out.rawvideo
-stddev:    9.44 PSNR: 28.62 MAXDIFF:   84 bytes:  7603200/  7603200
+ed493bad827dc903188fce8d3b597fcb *tests/data/fate/vsynth1-dv-411.out.rawvideo
+stddev:    9.45 PSNR: 28.62 MAXDIFF:   84 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth1-dv-50

-a193c5f92bf6e74c604e759d5f4f0f94 *tests/data/fate/vsynth1-dv-50.dv
+adb1df1a65cecab225677003a5de9f28 *tests/data/fate/vsynth1-dv-50.dv
 14400000 tests/data/fate/vsynth1-dv-50.dv
-41c4df5f2d876fcd5245643b9ded6711 *tests/data/fate/vsynth1-dv-50.out.rawvideo
-stddev:    1.72 PSNR: 43.38 MAXDIFF:   29 bytes:  7603200/  7603200
+4ab1f5b7aad15fab9e3c1ea5b96da39b *tests/data/fate/vsynth1-dv-50.out.rawvideo
+stddev:    1.72 PSNR: 43.37 MAXDIFF:   29 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth2-dv

-9002a5769a7744a4b8d24b01787abc3b *tests/data/fate/vsynth2-dv.dv
+6a059698f1f619312dd91504697cca98 *tests/data/fate/vsynth2-dv.dv
 7200000 tests/data/fate/vsynth2-dv.dv
-22a62dc9108c4a8b1a3c708e5d383748 *tests/data/fate/vsynth2-dv.out.rawvideo
-stddev:    1.99 PSNR: 42.12 MAXDIFF:   38 bytes:  7603200/  7603200
+528fd407b6d19f5fe3b3446a3080d148 *tests/data/fate/vsynth2-dv.out.rawvideo
+stddev:    1.99 PSNR: 42.13 MAXDIFF:   38 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth2-dv-411

-701dac8c1d3fe69957eab7ba8d5ecb25 *tests/data/fate/vsynth2-dv-411.dv
+a4afd3c595b4242fb5f1329c82a0b0c2 *tests/data/fate/vsynth2-dv-411.dv
 7200000 tests/data/fate/vsynth2-dv-411.dv
-bf821931bb81f4e92dc38f86d8187300 *tests/data/fate/vsynth2-dv-411.out.rawvideo
-stddev:    3.48 PSNR: 37.28 MAXDIFF:   56 bytes:  7603200/  7603200
+1ef9bd89b72a942c02571f32af03bb04 *tests/data/fate/vsynth2-dv-411.out.rawvideo
+stddev:    3.48 PSNR: 37.29 MAXDIFF:   56 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth2-dv-50

-9b9ebdf35911dad62203dfdf1f56754e *tests/data/fate/vsynth2-dv-50.dv
+8774632954e780697c472d945c597daf *tests/data/fate/vsynth2-dv-50.dv
 14400000 tests/data/fate/vsynth2-dv-50.dv
-b4d324b2095bc919ad16891891d40b36 *tests/data/fate/vsynth2-dv-50.out.rawvideo
-stddev:    0.88 PSNR: 49.20 MAXDIFF:   17 bytes:  7603200/  7603200
+11167de05c205f974d462f91f56eb837 *tests/data/fate/vsynth2-dv-50.out.rawvideo
+stddev:    0.86 PSNR: 49.43 MAXDIFF:   17 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth_lena-dv

-85b8d55b0b68bb3fc2e90babb580f9b7 *tests/data/fate/vsynth_lena-dv.dv
+ab03241e988dcd5bd36a76b25372343f *tests/data/fate/vsynth_lena-dv.dv
 7200000 tests/data/fate/vsynth_lena-dv.dv
-7dac420637360b031ccae7c5a69c5e0c *tests/data/fate/vsynth_lena-dv.out.rawvideo
-stddev:    1.70 PSNR: 43.47 MAXDIFF:   33 bytes:  7603200/  7603200
+6e4b90be39ad408ddc1c0dc4ced40bf0 *tests/data/fate/vsynth_lena-dv.out.rawvideo
+stddev:    1.69 PSNR: 43.54 MAXDIFF:   33 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth_lena-dv-411

-e428508f400327aeb96969c08fb9e1b5 *tests/data/fate/vsynth_lena-dv-411.dv
+1a7f091993eb6fe5b6f9d927ba60387d *tests/data/fate/vsynth_lena-dv-411.dv
 7200000 tests/data/fate/vsynth_lena-dv-411.dv
-713ed907fde448c603d6e9aee5efedd1 *tests/data/fate/vsynth_lena-dv-411.out.rawvideo
-stddev:    2.89 PSNR: 38.91 MAXDIFF:   45 bytes:  7603200/  7603200
+e5624f3d4de96e514ac9b96c2b4b447c *tests/data/fate/vsynth_lena-dv-411.out.rawvideo
+stddev:    2.87 PSNR: 38.97 MAXDIFF:   45 bytes:  7603200/  7603200

tests/ref/vsynth/vsynth_lena-dv-50

-0032a07167199e6f49e07fa7ed4d5f62 *tests/data/fate/vsynth_lena-dv-50.dv
+c678b291e58a277725aa4557387efc58 *tests/data/fate/vsynth_lena-dv-50.dv
 14400000 tests/data/fate/vsynth_lena-dv-50.dv
-56c77e537291536b242857d1056de30c *tests/data/fate/vsynth_lena-dv-50.out.rawvideo
-stddev:    0.82 PSNR: 49.82 MAXDIFF:   12 bytes:  7603200/  7603200
+bda4f98f387f82986e521b78a9bc1eef *tests/data/fate/vsynth_lena-dv-50.out.rawvideo
+stddev:    0.78 PSNR: 50.28 MAXDIFF:   12 bytes:  7603200/  7603200