stash/pkg/ffmpeg/encoder_transcode.go

package ffmpeg

import (
	"io"
	"os"
)

type TranscodeOptions struct {
	OutputPath string
}

func (e *Encoder) Transcode(probeResult VideoFile, options TranscodeOptions) {
	args := []string{
		"-i", probeResult.Path,
		"-c:v", "libx264",
		"-pix_fmt", "yuv420p",
		"-profile:v", "high",
		"-level", "4.2",
		"-preset", "superfast",
		"-crf", "23",
		"-vf", "scale=iw:-2",
		"-c:a", "aac",
		"-strict", "-2",
		options.OutputPath,
	}
	_, _ = e.run(probeResult, args)
}

func (e *Encoder) StreamTranscode(probeResult VideoFile, startTime string) (io.ReadCloser, *os.Process, error) {
	args := []string{}

	if startTime != "" {
		args = append(args, "-ss", startTime)
	}

	args = append(args,
		"-i", probeResult.Path,
		"-c:v", "libvpx-vp9",
		"-vf", "scale=iw:-2",
		"-deadline", "realtime",
		"-cpu-used", "5",
		"-row-mt", "1",
		"-crf", "30",
		"-b:v", "0",
		"-f", "webm",
		"pipe:",
	)

	return e.stream(probeResult, args)
}