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FFmpeg.go
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FFmpeg.go
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package main
import (
"bufio"
"context"
"errors"
log "github.com/sirupsen/logrus"
"os/exec"
"strconv"
"time"
)
func RecordCamVideo(ctx context.Context, cancel context.CancelFunc) {
defer cancel()
for {
select {
case <-ctx.Done():
return
default: // Default is must to avoid blocking
}
ffmpegCmd := exec.Command("ffmpeg", "-use_wallclock_as_timestamps", "1", "-i", streamUrl,
"-vcodec", "copy", "-acodec", "copy", "-map", "0", "-f", "segment", "-segment_time", "60", "-strftime", "1",
"-reset_timestamps", "1", "-loglevel", "level+info", "-nostats", videoPath+"cam%Y-%m-%d_%H-%M-%S.mkv")
err := LaunchFFmpeg(ctx, "stream", ffmpegCmd)
if err != nil {
log.Debugf("[stream] ffmpeg finished with error: %s", err)
time.Sleep(time.Second * 10)
}
}
}
func LaunchFFmpeg(ctx context.Context, logPrefix string, ffmpegCmd *exec.Cmd) error {
stdoutPipe, err := ffmpegCmd.StdoutPipe()
if err != nil {
return errors.New("Failed to open stdout pipe: " + err.Error())
}
stderrPipe, err := ffmpegCmd.StderrPipe()
if err != nil {
return errors.New("Failed to open stderr pipe: " + err.Error())
}
log.Debugf("["+logPrefix+"] Running command: %s", ffmpegCmd)
if err := ffmpegCmd.Start(); err != nil {
return errors.New("Failed to start ffmpeg command: " + err.Error())
}
stdout := bufio.NewScanner(stdoutPipe)
stderr := bufio.NewScanner(stderrPipe)
go logstd(logPrefix, stdout)
go logstd(logPrefix, stderr)
go func() {
ffmpegCmd.Wait()
}()
for ffmpegCmd.ProcessState == nil || !ffmpegCmd.ProcessState.Exited() {
select {
case <-ctx.Done():
return ffmpegCmd.Process.Kill()
default: // Default is must to avoid blocking
}
time.Sleep(time.Second * 1)
}
exitCode := ffmpegCmd.ProcessState.ExitCode()
if exitCode != 0 {
return errors.New("ffmpeg command exited with exit code: " + strconv.Itoa(exitCode))
}
log.Debugf("[" + logPrefix + "] ffmpeg finished successfully")
return nil
}
func logstd(logPrefix string, stdout *bufio.Scanner) {
for stdout.Scan() {
log.Info("[" + logPrefix + "] " + stdout.Text())
}
if err := stdout.Err(); err != nil {
log.Errorf("["+logPrefix+"] error: %s", err)
}
}