mirror of
https://github.com/webmproject/libwebp.git
synced 2025-07-13 06:24:27 +02:00
img2webp: convert a sequence of images to an animated webp
Usage:
img2webp [file-level options] [image files...] [per-frame options...]
File-level options (only used at the start of compression):
-min_size ............ minimize size
-loop <int> .......... loop count (default: 0, = infinite loop)
-kmax <int> .......... maximum number of frame between key-frames
(0=only keyframes)
-kmin <int> .......... minimum number of frame between key-frames
(0=disable key-frames altogether)
-mixed ............... use mixed lossy/lossless automatic mode
-v ................... verbose mode
-h ................... this help
Per-frame options (only used for subsequent images input):
-d <int> ............. frame duration in ms (default: 100)
-lossless ........... use lossless mode (default)
-lossy ... ........... use lossy mode
-q <float> ........... quality
-m <int> ............. method to use
example: img2webp -loop 2 in0.png -lossy in1.jpg
-d 80 in2.tiff -o out.webp
Change-Id: I23771b90eaf0660f420d7ffd304e704155386286
This commit is contained in:
Pascal Massimino
@ -64,3 +64,19 @@ LOCAL_STATIC_LIBRARIES := example_util imageio_util webpmux webp
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LOCAL_MODULE := webpmux_example
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include $(BUILD_EXECUTABLE)
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################################################################################
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# img2webp
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include $(CLEAR_VARS)
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LOCAL_SRC_FILES := \
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img2webp.c \
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LOCAL_CFLAGS := $(WEBP_CFLAGS)
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LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
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LOCAL_STATIC_LIBRARIES := example_util imageio_util imagedec webpmux webp
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LOCAL_MODULE := img2webp_example
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include $(BUILD_EXECUTABLE)
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@ -7,6 +7,9 @@ endif
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if BUILD_GIF2WEBP
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bin_PROGRAMS += gif2webp
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endif
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if BUILD_IMG2WEBP
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bin_PROGRAMS += img2webp
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endif
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if WANT_MUX
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bin_PROGRAMS += webpmux
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endif
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@ -56,6 +59,13 @@ webpmux_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
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webpmux_LDADD = libexample_util.la ../imageio/libimageio_util.la
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webpmux_LDADD += ../src/mux/libwebpmux.la ../src/libwebp.la
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img2webp_SOURCES = img2webp.c
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img2webp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
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img2webp_LDADD = libexample_util.la ../imageio/libimageio_util.la
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img2webp_LDADD += ../imageio/libimagedec.la
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img2webp_LDADD += ../src/mux/libwebpmux.la ../src/libwebp.la
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img2webp_LDADD += $(PNG_LIBS) $(JPEG_LIBS) $(TIFF_LIBS)
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if BUILD_LIBWEBPDECODER
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anim_diff_LDADD += ../src/libwebpdecoder.la
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vwebp_LDADD += ../src/libwebpdecoder.la
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285
examples/img2webp.c
Normal file
285
examples/img2webp.c
Normal file
@ -0,0 +1,285 @@
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// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// generate an animated WebP out of a sequence of images
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// (PNG, JPEG, ...)
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//
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// Example usage:
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// img2webp -o out.webp -q 40 -mixed -duration 40 input??.png
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//
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// Author: skal@google.com (Pascal Massimino)
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_CONFIG_H
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#include "webp/config.h"
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#endif
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#include "../examples/example_util.h"
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#include "../imageio/image_dec.h"
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#include "../imageio/imageio_util.h"
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#include "./stopwatch.h"
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#include "webp/encode.h"
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#include "webp/mux.h"
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//------------------------------------------------------------------------------
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static void Help(void) {
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printf("Usage:\n\n");
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printf(" img2webp [file-level options] [image files...] "
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"[per-frame options...]\n");
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printf("\n");
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printf("File-level options (only used at the start of compression):\n");
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printf(" -min_size ............ minimize size\n");
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printf(" -loop <int> .......... loop count (default: 0, = infinite loop)\n");
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printf(" -kmax <int> .......... maximum number of frame between key-frames\n"
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" (0=only keyframes)\n");
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printf(" -kmin <int> .......... minimum number of frame between key-frames\n"
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" (0=disable key-frames altogether)\n");
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printf(" -mixed ............... use mixed lossy/lossless automatic mode\n");
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printf(" -v ................... verbose mode\n");
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printf(" -h ................... this help\n");
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printf("\n");
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printf("Per-frame options (only used for subsequent images input):\n");
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printf(" -d <int> ............. frame duration in ms (default: 100)\n");
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printf(" -lossless ........... use lossless mode (default)\n");
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printf(" -lossy ... ........... use lossy mode\n");
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printf(" -q <float> ........... quality\n");
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printf(" -m <int> ............. method to use\n");
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printf("\n");
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printf("example: img2webp -loop 2 in0.png -lossy in1.jpg\n"
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" -d 80 in2.tiff -o out.webp\n");
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}
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//------------------------------------------------------------------------------
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static int ReadImage(const char filename[], WebPPicture* const pic) {
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const uint8_t* data = NULL;
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size_t data_size = 0;
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WebPImageReader reader;
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int ok;
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if (!ImgIoUtilReadFile(filename, &data, &data_size)) return 0;
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reader = WebPGuessImageReader(data, data_size);
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ok = reader(data, data_size, pic, 1, NULL);
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free((void*)data);
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return ok;
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}
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static int SetLoopCount(int loop_count, WebPData* const webp_data) {
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int ok = 1;
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WebPMuxError err;
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WebPMuxAnimParams new_params;
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WebPMux* const mux = WebPMuxCreate(webp_data, 1);
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if (mux == NULL) return 0;
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err = WebPMuxGetAnimationParams(mux, &new_params);
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ok = (err == WEBP_MUX_OK);
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if (ok) {
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new_params.loop_count = loop_count;
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err = WebPMuxSetAnimationParams(mux, &new_params);
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ok = (err == WEBP_MUX_OK);
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}
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if (ok) {
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WebPDataClear(webp_data);
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err = WebPMuxAssemble(mux, webp_data);
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ok = (err == WEBP_MUX_OK);
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}
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WebPMuxDelete(mux);
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if (!ok) {
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fprintf(stderr, "Error during loop-count setting\n");
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}
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return ok;
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}
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//------------------------------------------------------------------------------
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int main(int argc, char* argv[]) {
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const char* output = NULL;
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WebPAnimEncoder* enc = NULL;
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int verbose = 0;
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int pic_num = 0;
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int duration = 100;
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int timestamp_ms = 0;
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int ok = 1;
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int loop_count = 0;
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int width = 0, height = 0;
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WebPAnimEncoderOptions anim_config;
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WebPConfig config;
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WebPPicture pic;
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WebPData webp_data;
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int c;
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int have_input = 0;
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WebPDataInit(&webp_data);
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if (!WebPAnimEncoderOptionsInit(&anim_config) ||
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!WebPConfigInit(&config) ||
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!WebPPictureInit(&pic)) {
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fprintf(stderr, "Library version mismatch!\n");
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return 1;
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}
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// 1st pass of option parsing
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for (c = 1; ok && c < argc; ++c) {
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if (argv[c][0] == '-') {
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int parse_error = 0;
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if (!strcmp(argv[c], "-o") && c + 1 < argc) {
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argv[c] = NULL;
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output = argv[++c];
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} else if (!strcmp(argv[c], "-kmin") && c + 1 < argc) {
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argv[c] = NULL;
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anim_config.kmin = ExUtilGetInt(argv[++c], 0, &parse_error);
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} else if (!strcmp(argv[c], "-kmax") && c + 1 < argc) {
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argv[c] = NULL;
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anim_config.kmax = ExUtilGetInt(argv[++c], 0, &parse_error);
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} else if (!strcmp(argv[c], "-loop") && c + 1 < argc) {
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argv[c] = NULL;
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loop_count = ExUtilGetInt(argv[++c], 0, &parse_error);
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if (loop_count < 0) {
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fprintf(stderr, "Invalid non-positive loop-count (%d)\n", loop_count);
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parse_error = 1;
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}
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} else if (!strcmp(argv[c], "-min_size")) {
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anim_config.minimize_size = 1;
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} else if (!strcmp(argv[c], "-mixed")) {
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anim_config.allow_mixed = 1;
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config.lossless = 0;
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} else if (!strcmp(argv[c], "-v")) {
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verbose = 1;
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} else if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
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Help();
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return 0;
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} else {
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continue;
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}
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ok = !parse_error;
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if (!ok) goto End;
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argv[c] = NULL; // mark option as 'parsed' during 1st pass
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} else {
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have_input |= 1;
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}
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}
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if (!have_input) {
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fprintf(stderr, "No input file(s) for generating animation!\n");
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return 0;
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}
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// image-reading pass
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pic_num = 0;
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for (c = 1; ok && c < argc; ++c) {
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if (argv[c] == NULL) continue;
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if (argv[c][0] == '-') { // parse local options
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int parse_error = 0;
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if (!strcmp(argv[c], "-lossy")) {
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if (!anim_config.allow_mixed) config.lossless = 0;
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} else if (!strcmp(argv[c], "-lossless")) {
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if (!anim_config.allow_mixed) config.lossless = 1;
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} else if (!strcmp(argv[c], "-q") && c + 1 < argc) {
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config.quality = ExUtilGetFloat(argv[++c], &parse_error);
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} else if (!strcmp(argv[c], "-m") && c + 1 < argc) {
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config.method = ExUtilGetInt(argv[++c], 0, &parse_error);
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} else if (!strcmp(argv[c], "-d") && c + 1 < argc) {
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duration = ExUtilGetInt(argv[++c], 0, &parse_error);
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if (duration <= 0) {
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fprintf(stderr, "Invalid negative duration (%d)\n", duration);
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parse_error = 1;
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}
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} else {
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parse_error = 1; // shouldn't be here.
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fprintf(stderr, "Unknown option [%s]\n", argv[c]);
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}
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ok = !parse_error;
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if (!ok) goto End;
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continue;
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}
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if (ok) {
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ok = WebPValidateConfig(&config);
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if (!ok) {
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fprintf(stderr, "Invalid configuration.\n");
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goto End;
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}
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}
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// read next input image
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ok = ReadImage(argv[c], &pic);
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if (!ok) goto End;
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if (enc == NULL) {
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width = pic.width;
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height = pic.height;
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enc = WebPAnimEncoderNew(width, height, &anim_config);
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ok = (enc != NULL);
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if (!ok) {
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fprintf(stderr, "Could not create WebPAnimEncoder object.\n");
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}
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}
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if (ok) {
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ok = (width == pic.width && height == pic.height);
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if (!ok) {
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fprintf(stderr, "Frame #%d dimension mismatched! "
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"Got %d x %d. Was expecting %d x %d.\n",
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pic_num, pic.width, pic.height, width, height);
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}
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}
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if (ok) {
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ok = WebPAnimEncoderAdd(enc, &pic, timestamp_ms, &config);
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if (!ok) {
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fprintf(stderr, "Error while adding frame #%d\n", pic_num);
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}
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}
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WebPPictureFree(&pic);
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if (!ok) goto End;
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if (verbose) {
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fprintf(stderr, "Added frame #%3d at time %4d (file: %s)\n",
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pic_num, timestamp_ms, argv[c]);
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}
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timestamp_ms += duration;
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++pic_num;
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}
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// add a last fake frame to signal the last duration
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ok = ok && WebPAnimEncoderAdd(enc, NULL, timestamp_ms, NULL);
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ok = ok && WebPAnimEncoderAssemble(enc, &webp_data);
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if (!ok) {
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fprintf(stderr, "Error during final animation assembly.\n");
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}
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End:
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// free resources
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WebPAnimEncoderDelete(enc);
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if (ok && loop_count > 0) { // Re-mux to add loop count.
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ok = SetLoopCount(loop_count, &webp_data);
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}
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if (ok) {
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if (output != NULL) {
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ok = ImgIoUtilWriteFile(output, webp_data.bytes, webp_data.size);
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if (ok) fprintf(stderr, "output file: %s ", output);
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} else {
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fprintf(stderr, "[no output file specified] ");
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}
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}
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if (ok) {
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fprintf(stderr, "[%d frames, %u bytes].\n",
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pic_num, (unsigned int)webp_data.size);
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}
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WebPDataClear(&webp_data);
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return ok ? 0 : 1;
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}
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