dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-13 06:24:27 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

gif2webp: Different kmin/kmax defaults for lossy and lossless

Browse Source 
These were the best values found considering the compression gain and
decoding speed.

Change-Id: Iddae4c5b78c6aa42b1f8a034d1c1b93843071a81
This commit is contained in:
Urvang Joshi
2013-09-30 14:25:58 -07:00
parent 92d47e4ca9
commit fb887f7fe6
2 changed files with 17 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
examples/gif2webp.c
View File

@ -307,8 +307,11 @@ int main(int argc, const char *argv[]) {
WebPData webp_data = { NULL, 0 };
int stored_icc = 0; // Whether we have already stored an ICC profile.
int stored_xmp = 0;
size_t kmin = 9;
size_t kmax = 17;
int default_kmin = 1; // Whether to use default kmin value.
int default_kmax = 1;
size_t kmin = 0;
size_t kmax = 0;
memset(&frame, 0, sizeof(frame));
frame.id = WEBP_CHUNK_ANMF;
@ -341,8 +344,10 @@ int main(int argc, const char *argv[]) {
config.method = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-kmax") && c < argc - 1) {
kmax = strtoul(argv[++c], NULL, 0);
default_kmax = 0;
} else if (!strcmp(argv[c], "-kmin") && c < argc - 1) {
kmin = strtoul(argv[++c], NULL, 0);
default_kmin = 0;
} else if (!strcmp(argv[c], "-f") && c < argc - 1) {
config.filter_strength = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-version")) {
@ -366,6 +371,13 @@ int main(int argc, const char *argv[]) {
}
}
// Appropriate default kmin, kmax values for lossy and lossless.
if (default_kmin) {
kmin = config.lossless ? 9 : 3;
}
if (default_kmax) {
kmax = config.lossless ? 17 : 5;
}
SanitizeKeyFrameIntervals(&kmin, &kmax);
cache = WebPFrameCacheNew(kmin, kmax);