58 lines
1.7 KiB
Go
58 lines
1.7 KiB
Go
package helper
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import (
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"bytes"
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"fmt"
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"os/exec"
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)
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func ConvertImageToWebp(imgData []byte) ([]byte, error) {
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convertCmd := exec.Command("convert", "-", "-resize", "512x512", "-background", "none", "-compose", "Copy", "-gravity", "center", "-extent", "512x512", "-quality", "100", "png:-")
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convertCmd.Stdin = bytes.NewReader(imgData)
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var convertBuf bytes.Buffer
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var stderr bytes.Buffer
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convertCmd.Stdout = &convertBuf
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convertCmd.Stderr = &stderr
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if err := convertCmd.Run(); err != nil {
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return nil, fmt.Errorf("convert failed: %w, stderr: %s", err, stderr.String())
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}
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cwebpCmd := exec.Command("cwebp", "-quiet", "-mt", "-exact", "-q", "100", "-m", "6", "-alpha_q", "100", "-o", "-", "--", "-")
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cwebpCmd.Stdin = &convertBuf
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var cwebpBuf bytes.Buffer
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var cwebStderr bytes.Buffer
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cwebpCmd.Stdout = &cwebpBuf
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cwebpCmd.Stderr = &cwebStderr
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if err := cwebpCmd.Run(); err != nil {
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return nil, fmt.Errorf("cwebp failed: %w, stderr: %s", err, cwebStderr.String())
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}
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return cwebpBuf.Bytes(), nil
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}
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func ConvertVideoToWebp(vidData []byte) ([]byte, error) {
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ffmpegCmd := exec.Command("ffmpeg",
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"-y", "-hide_banner", "-loglevel", "error",
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"-i", "pipe:0",
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"-ss", "00:00:00", "-t", "00:00:15",
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"-vcodec", "libwebp",
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"-vf", "fps=10,scale=720:-1:flags=lanczos:force_original_aspect_ratio=increase,crop=512:512,pad=512:512:(ow-iw)/2:(oh-ih)/2:color=#00000000,setsar=1",
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"-loop", "0",
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"-preset", "default",
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"-an",
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"-f", "webp", "pipe:1",
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)
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ffmpegCmd.Stdin = bytes.NewReader(vidData)
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var outBuf bytes.Buffer
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var stderr bytes.Buffer
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ffmpegCmd.Stdout = &outBuf
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ffmpegCmd.Stderr = &stderr
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if err := ffmpegCmd.Run(); err != nil {
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return nil, fmt.Errorf("ffmpeg direct convert failed: %w, stderr: %s", err, stderr.String())
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}
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return outBuf.Bytes(), nil
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}
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