libwebp-0.6.0 - 1/26/2017: version 0.6.0 * lossless performance and compression improvements * miscellaneous performance improvements (SSE2, NEON, MSA) * webpmux gained a -duration option allowing for frame timing modification * new img2webp utility allowing a sequence of images to be converted to animated webp * API changes: - libwebp: WebPPictureSharpARGBToYUVA WebPPlaneDistortion - libwebpmux / gif2webp: WebPAnimEncoderOptions: kmax <= 0 now disables keyframes, kmax == 1 forces all keyframes. See mux.h and the gif2webp manpage for details.
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