update libvpx & libwebp to latest releases (#629)

* update libvpx & libwebp to latest releases

libvpx: 1.13.1
libwebp: 1.3.2

* Dockerfile: update libwebp libraries

libwebpmux is required for libwebp_anim_encoder. libsharpyuv is required
by libwebp since 1.3.0.

Author: jzern

Diff for: Dockerfile

@@ -36,7 +36,7 @@ RUN bash -x /src/build.sh
 
 # Build libvpx
 FROM emsdk-base AS libvpx-builder
-ENV LIBVPX_BRANCH=v1.9.0
+ENV LIBVPX_BRANCH=v1.13.1
 ADD https://github.com/ffmpegwasm/libvpx.git#$LIBVPX_BRANCH /src
 COPY build/libvpx.sh /src/build.sh
 RUN bash -x /src/build.sh
@@ -88,7 +88,7 @@ RUN bash -x /src/build.sh
 # Build libwebp
 FROM emsdk-base AS libwebp-builder
 COPY --from=zlib-builder $INSTALL_DIR $INSTALL_DIR
-ENV LIBWEBP_BRANCH=v1.1.0
+ENV LIBWEBP_BRANCH=v1.3.2
 ADD https://github.com/ffmpegwasm/libwebp.git#$LIBWEBP_BRANCH /src
 COPY build/libwebp.sh /src/build.sh
 RUN bash -x /src/build.sh
@@ -184,7 +184,9 @@ ENV FFMPEG_LIBS \
       -lvorbisfile \
       -lopus \
       -lz \
+      -lwebpmux \
       -lwebp \
+      -lsharpyuv \
       -lfreetype \
       -lfribidi \
       -lharfbuzz \

Diff for: apps/website/docs/overview.md

@@ -92,14 +92,14 @@ ffmpeg.wasm is built with toolchains / libraries:
             {name: "FFmpeg", version: "n5.1.4", note: "FFmpeg is a powerful multimedia framework that can decode, encode, transcode, and stream audio and video files. It's widely used for media manipulation and streaming."},
             {name: "x264", version: "0.164.x", note: "x264 is a popular video encoding library that provides high-quality H.264 video compression. It's commonly used for video encoding and transcoding."},
             {name: "x265", version: "3.4", note: "x265 is a video encoding library that specializes in encoding videos using the H.265/HEVC codec, offering high compression efficiency for video content."},
-            {name: "libvpx", version: "v1.9.0", note: "libvpx is an open-source video codec library used for encoding and decoding VP8 and VP9 video formats, commonly used for web-based video streaming."},
+            {name: "libvpx", version: "v1.13.1", note: "libvpx is an open-source video codec library used for encoding and decoding VP8 and VP9 video formats, commonly used for web-based video streaming."},
             {name: "lame", version: "3.100", note: "LAME is an audio encoder that converts audio files to the MP3 format, making it widely used for creating MP3 audio files."},
             {name: "ogg", version: "v1.3.4", note: "Ogg is a multimedia container format, and this library provides support for encoding and decoding audio and video in the Ogg format."},
             {name: "theora", version: "v1.1.1", note: "Theora is an open video codec designed for efficient video compression within the Ogg multimedia framework."},
             {name: "opus", version: "v1.3.1", note: "Opus is a versatile audio codec capable of handling both voice and music with low latency and high-quality compression."},
             {name: "vorbis", version: "v1.3.3", note: "Vorbis is an open-source audio codec known for its high audio quality and efficient compression. It's often used for audio streaming."},
             {name: "zlib", version: "v1.2.11", note: "zlib is a compression library that provides data compression and decompression functionality, commonly used in file compression formats like gzip."},
-            {name: "libwebp", version: "v1.1.0", note: "libwebp is a library for working with the WebP image format, offering efficient image compression for web use"},
+            {name: "libwebp", version: "v1.3.2", note: "libwebp is a library for working with the WebP image format, offering efficient image compression for web use"},
             {name: "freetype2", version: "v2.10.4", note: "FreeType 2 is a library for rendering fonts. It is commonly used for text rendering in applications and systems."},
             {name: "fribidi", version: "v1.0.9", note: "FriBidi is a library for handling bidirectional text (text containing both left-to-right and right-to-left scripts) and is often used in text layout and rendering."},
             {name: "harfbuzz", version: "5.2.0", note: "HarfBuzz is a text shaping engine that allows complex script text to be rendered correctly. It's used in conjunction with font rendering libraries."},