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package main
import (
"bufio"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"path"
"strings"
)
const (
subExt = ".vtt"
outdir = "/mnt/desktop/media/datasets/nesfatelp_voice/utterances"
ffCmdOut = "./ff_commands"
timeSep = "-->"
metadataPath = "/mnt/desktop/media/datasets/nesfatelp_voice/metadata.json"
)
type Utterance struct {
LeftTime string
RightTime string
Text string
OutPath string
}
type FileData struct {
VttPath string
AudioPath string
AudioBase string
}
func NewFileData(vttPath string) *FileData {
fd := &FileData{
VttPath: vttPath,
AudioPath: strings.Trim(vttPath, subExt),
}
fd.AudioBase = path.Base(fd.AudioPath)
return fd
}
func linesToUtterances(lines []string, fd *FileData) []*Utterance {
resp := []*Utterance{}
for i, line := range lines {
if !strings.Contains(line, timeSep) {
continue
}
// get times
splitted := strings.Split(line, timeSep)
u := &Utterance{
Text: lines[i+1],
LeftTime: strings.TrimSpace(splitted[0]),
RightTime: strings.TrimSpace(splitted[1]),
}
u.OutPath = fmt.Sprintf("%s/%s_%s_%s.wav", outdir, fd.AudioBase,
u.LeftTime, u.RightTime)
resp = append(resp, u)
}
return resp
}
func readLines(filepath string) []string {
file, err := os.Open(filepath)
if err != nil {
log.Fatal(err)
}
defer file.Close()
resp := []string{}
scanner := bufio.NewScanner(file)
for scanner.Scan() {
resp = append(resp, scanner.Text())
}
if err := scanner.Err(); err != nil {
log.Fatal(err)
}
return resp
}
// writeLines writes the lines to the given file.
func writeLines(lines []string, path string) error {
file, err := os.Create(path)
if err != nil {
return err
}
defer file.Close()
w := bufio.NewWriter(file)
for _, line := range lines {
fmt.Fprintln(w, line)
}
return w.Flush()
}
func readJson(filepath string) map[string]string {
plan, _ := ioutil.ReadFile(filepath)
data := make(map[string]string)
err := json.Unmarshal(plan, &data)
if err != nil {
log.Fatal(err)
}
return data
}
func writeJson(data map[string]string) {
metadataJson, _ := json.MarshalIndent(data, "", " ")
err := ioutil.WriteFile(metadataPath, metadataJson, 0644)
if err != nil {
log.Fatal(err)
}
}
func buildFFmpegCall(fd *FileData, ut *Utterance) string {
return fmt.Sprintf(
`ffmpeg -i %s -ss %s -to %s \
-metadata text_source="%s" \
-ar 22050 %s`,
fd.AudioPath, ut.LeftTime, ut.RightTime,
fd.VttPath, ut.OutPath,
)
}
func utterancesToFileTextMap(utterances []*Utterance) map[string]string {
resp := make(map[string]string)
for _, ut := range utterances {
resp[ut.OutPath] = ut.Text
}
return resp
}
func main() {
vttFilepath := os.Args[1]
fd := NewFileData(vttFilepath)
fmt.Println("working with:", fd)
lines := readLines(vttFilepath)
utterances := linesToUtterances(lines, fd)
ffmpegCommands := make([]string, len(utterances))
for i, ut := range utterances {
ffmpegCommands[i] = buildFFmpegCall(fd, ut)
}
fmt.Println("utterances len:", len(utterances))
writeLines(ffmpegCommands, ffCmdOut)
metadata := readJson(metadataPath)
newMeta := utterancesToFileTextMap(utterances)
for k, v := range newMeta {
metadata[k] = v
}
writeJson(metadata)
}
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