Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

WIP: Subtitles track #165

Open
wants to merge 3 commits into
base: master
Choose a base branch
from
Open

WIP: Subtitles track #165

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
10b1e78
transcode based
Jul 21, 2023
524e92f
track based
Jul 22, 2023
1ea1963
track based subtitles
Jul 28, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
83 changes: 80 additions & 3 deletions application/application.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -780,7 +780,20 @@ func (a *Application) Load(filenameOrUrl string, startTime int, contentType stri
ContentId: mi.contentURL,
StreamType: "BUFFERED",
ContentType: mi.contentType,
Tracks: []cast.MediaTrack{
{
TrackId: 1,
TrackContentId: mi.contentURL + "&subtitles=1",
Language: "en-US",
Subtype: "SUBTITLES",
Type: "TEXT",
TrackContentType: "text/vtt",
Name: "kundalini Subtitle",
},
},
TextTrackStyle: cast.TextTrackStyle{BackgroundColor: "#FFFFFF00", EdgeType: "OUTLINE", EdgeColor: "#000000FF"},
},
ActiveTrackIds: []int{1},
})

// If we should detach from waiting for media to finish playing
Expand Down Expand Up @@ -1079,6 +1092,7 @@ func (a *Application) startStreamingServer() error {
// already been validated and is useable.
filename := r.URL.Query().Get("media_file")
canServe := false
isSubtitles := r.URL.Query().Get("subtitles")
for _, fn := range a.mediaFilenames {
if fn == filename {
canServe = true
Expand All @@ -1096,10 +1110,12 @@ func (a *Application) startStreamingServer() error {
liveStreaming = true
}

a.log("canServe=%t, liveStreaming=%t, filename=%s", canServe, liveStreaming, filename)
a.log("canServe=%t, liveStreaming=%t, filename=%s, isSubtitles=%s", canServe, liveStreaming, filename, isSubtitles)
if canServe {
if !liveStreaming {
http.ServeFile(w, r, filename)
} else if isSubtitles != "" {
a.serveSubtitles(w, r, filename)
} else {
a.serveLiveStreaming(w, r, filename)
}
Expand All @@ -1125,12 +1141,47 @@ func (a *Application) startStreamingServer() error {
return nil
}

// func (a *Application) serveLiveStreamingHardsub(w http.ResponseWriter, r *http.Request, filename string) {

// filterpath := strings.ReplaceAll(strings.ReplaceAll(strings.ReplaceAll(strings.ReplaceAll(filename, "\\", "/"), "[", "\\["), "]", "\\]"), ":", "\\\\:")
// cmd := exec.Command(
// "ffmpeg",
// "-hwaccel", "cuda",
// "-c:v", "h264_cuvid",
// "-i", filename,
// "-vcodec", "h264_nvenc",
// "-acodec", "aac",
// "-ac", "2", // chromecasts don't support more than two audio channels
// "-f", "mp4",
// "-vf", "subtitles="+filterpath+"",
// "-movflags", "frag_keyframe+faststart",
// "-strict", "-experimental",
// "pipe:1",
// )

// cmd.Stdout = w
// if a.debug {
// cmd.Stderr = os.Stderr
// }

// w.Header().Set("Access-Control-Allow-Origin", "*")
// w.Header().Set("Transfer-Encoding", "chunked")

// if err := cmd.Run(); err != nil {
// log.WithField("package", "application").WithFields(log.Fields{
// "filename": filename,
// }).WithError(err).Error("error transcoding")
// }
// }

func (a *Application) serveLiveStreaming(w http.ResponseWriter, r *http.Request, filename string) {

cmd := exec.Command(
"ffmpeg",
"-re", // encode at 1x playback speed, to not burn the CPU
"-hwaccel", "cuda",
"-c:v", "h264_cuvid",
"-i", filename,
"-vcodec", "h264",
"-vcodec", "h264_nvenc",
"-acodec", "aac",
"-ac", "2", // chromecasts don't support more than two audio channels
"-f", "mp4",
Expand All @@ -1154,6 +1205,32 @@ func (a *Application) serveLiveStreaming(w http.ResponseWriter, r *http.Request,
}
}

func (a *Application) serveSubtitles(w http.ResponseWriter, r *http.Request, filename string) {

cmd := exec.Command(
"ffmpeg",
"-i", filename,
"-c:s", "webvtt",
"-f", "webvtt",
"-strict", "-experimental",
"pipe:1",
)

cmd.Stdout = w
if a.debug {
cmd.Stderr = os.Stderr
}

w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Transfer-Encoding", "chunked")

if err := cmd.Run(); err != nil {
log.WithField("package", "application").WithFields(log.Fields{
"filename": filename,
}).WithError(err).Error("error transcoding")
}
}

func (a *Application) log(message string, args ...interface{}) {
if a.debug {
log.WithField("package", "application").Infof(message, args...)
Expand Down
28 changes: 23 additions & 5 deletions cast/payload.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -101,18 +101,36 @@ type LoadMediaCommand struct {
Autoplay bool `json:"autoplay"`
QueueData QueueData `json:"queueData"`
CustomData interface{} `json:"customData"`

ActiveTrackIds []int `json:"activeTrackIds"`
}

type QueueData struct {
StartIndex int `json:"startIndex"`
}

type MediaItem struct {
ContentId string `json:"contentId"`
ContentType string `json:"contentType"`
StreamType string `json:"streamType"`
Duration float32 `json:"duration"`
Metadata MediaMetadata `json:"metadata"`
ContentId string `json:"contentId"`
ContentType string `json:"contentType"`
StreamType string `json:"streamType"`
Duration float32 `json:"duration"`
Metadata MediaMetadata `json:"metadata"`
Tracks []MediaTrack `json:"tracks"`
TextTrackStyle TextTrackStyle `json:"textTrackStyle"`
}
type TextTrackStyle struct {
BackgroundColor string `json:"backgroundColor"`
EdgeType string `json:"edgeType"`
EdgeColor string `json:"edgeColor"`
}
type MediaTrack struct {
TrackId int `json:"trackId"`
TrackContentId string `json:"trackContentId"`
Language string `json:"language"`
Subtype string `json:"subtype"`
Type string `json:"type"`
TrackContentType string `json:"trackContentType"`
Name string `json:"name"`
}

type MediaMetadata struct {
Expand Down