Merge "gif2webp: force low duration frames to 100ms"
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c4cc114785
@ -593,6 +593,9 @@ static int ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
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curr_frame = &image->frames[i];
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curr_rgba = curr_frame->rgba;
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curr_frame->duration = GetFrameDurationGIF(gif, i);
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// Force frames with a small or no duration to 100ms to be consistent
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// with web browsers and other transcoding tools (like gif2webp itself).
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if (curr_frame->duration <= 10) curr_frame->duration = 100;
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if (i == 0) { // Initialize as transparent.
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curr_frame->is_key_frame = 1;
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@ -361,6 +361,14 @@ int main(int argc, const char *argv[]) {
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GIFDisposeFrame(orig_dispose, &gif_rect, &prev_canvas, &curr_canvas);
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GIFCopyPixels(&curr_canvas, &prev_canvas);
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// Force frames with a small or no duration to 100ms to be consistent
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// with web browsers and other transcoding tools. This also avoids
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// incorrect durations between frames when padding frames are
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// discarded.
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if (frame_duration <= 10) {
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frame_duration = 100;
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}
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// Update timestamp (for next frame).
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frame_timestamp += frame_duration;
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