53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
package transcoder
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import (
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"context"
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"io"
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"os"
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"os/exec"
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"strconv"
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"strings"
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"github.com/navidrome/navidrome/log"
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)
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type Transcoder interface {
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Start(ctx context.Context, command, path string, maxBitRate int) (f io.ReadCloser, err error)
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}
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func New() Transcoder {
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return &externalTranscoder{}
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}
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type externalTranscoder struct{}
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func (e *externalTranscoder) Start(ctx context.Context, command, path string, maxBitRate int) (f io.ReadCloser, err error) {
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args := createTranscodeCommand(command, path, maxBitRate)
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log.Trace(ctx, "Executing transcoding command", "cmd", args)
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cmd := exec.Command(args[0], args[1:]...) // #nosec
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cmd.Stderr = os.Stderr
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if f, err = cmd.StdoutPipe(); err != nil {
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return
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}
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if err = cmd.Start(); err != nil {
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return
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}
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go func() { _ = cmd.Wait() }() // prevent zombies
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return
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}
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// Path will always be an absolute path
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func createTranscodeCommand(cmd, path string, maxBitRate int) []string {
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split := strings.Split(cmd, " ")
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for i, s := range split {
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s = strings.ReplaceAll(s, "%s", path)
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s = strings.ReplaceAll(s, "%b", strconv.Itoa(maxBitRate))
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split[i] = s
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}
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return split
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}
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