{gif,img}2webp: sync -m help w/cwebp

These were both missing the mention of the default value (4).

Bug: webm:381109771
Change-Id: Ibb0d822310af443c5ff5219fc0334008de0a0c60

Author: jzern

doc/tools.md

@@ -324,7 +324,7 @@ Per-frame options (only used for subsequent images input):
 -lossless ............ use lossless mode (default)
 -lossy ............... use lossy mode
 -q <float> ........... quality
--m <int> ............. method to use
+-m <int> ............. compression method (0=fast, 6=slowest), default=4
 -exact, -noexact ..... preserve or alter RGB values in transparent area
                        (default: -noexact, may cause artifacts
                                  with lossy animations)
@@ -359,7 +359,7 @@ Options:
 -sharp_yuv ............. use sharper (and slower) RGB->YUV conversion
                          (lossy only)
 -q <float> ............. quality factor (0:small..100:big)
--m <int> ............... compression method (0=fast, 6=slowest)
+-m <int> ............... compression method (0=fast, 6=slowest), default=4
 -min_size .............. minimize output size (default:off)
                          lossless compression by default; can be
                          combined with -q, -m, -lossy or -mixed

examples/gif2webp.c

@@ -77,7 +77,8 @@ static void Help(void) {
                                     "conversion\n"
          "                           (lossy only)\n");
   printf("  -q <float> ............. quality factor (0:small..100:big)\n");
-  printf("  -m <int> ............... compression method (0=fast, 6=slowest)\n");
+  printf("  -m <int> ............... compression method (0=fast, 6=slowest), "
+         "default=4\n");
   printf("  -min_size .............. minimize output size (default:off)\n"
          "                           lossless compression by default; can be\n"
          "                           combined with -q, -m, -lossy or -mixed\n"

examples/img2webp.c

@@ -62,7 +62,8 @@ static void Help(void) {
   printf(" -lossless ............ use lossless mode (default)\n");
   printf(" -lossy ............... use lossy mode\n");
   printf(" -q <float> ........... quality\n");
-  printf(" -m <int> ............. method to use\n");
+  printf(" -m <int> ............. compression method (0=fast, 6=slowest), "
+         "default=4\n");
   printf(" -exact, -noexact ..... preserve or alter RGB values in transparent "
                                   "area\n"
          "                        (default: -noexact, may cause artifacts\n"