public static Boolean isTranscodeRequired(TranscodeProfile profile) {
// Make sure we have the information we require
if (profile.getMediaElement() == null
|| profile.getQuality() == null
|| profile.getCodecs() == null) {
return null;
}
// Check video codec
if (profile.getMediaElement().getVideoStream() != null) {
if (isTranscodeRequired(profile, profile.getMediaElement().getVideoStream())) {
return true;
}
}
// Check audio streams
if (profile.getMediaElement().getAudioStreams() != null) {
for (AudioStream stream : profile.getMediaElement().getAudioStreams()) {
if (isTranscodeRequired(profile, stream)) {
return true;
}
}
}
// Check subtitle streams
if (profile.getMediaElement().getSubtitleStreams() != null) {
for (SubtitleStream stream : profile.getMediaElement().getSubtitleStreams()) {
if (!isSupported(profile.getCodecs(), stream.getFormat())) {
return true;
}
}
}
return false;
}
public Integer getForcedSubtitleIndex(MediaElement element) {
// Check this is a video element
if (element.getType() != MediaElementType.VIDEO) {
return null;
}
// Get list of subtitle streams for video file
List<SubtitleStream> subtitles = element.getSubtitleStreams();
if (subtitles == null) {
return null;
}
// Scan subtitles for forced streams
for (SubtitleStream subtitle : subtitles) {
if (subtitle.isForced()) {
return subtitle.getStream();
}
}
return null;
}
public static boolean processSubtitles(TranscodeProfile profile) {
// Check variables
if (profile.getMediaElement() == null
|| profile.getCodecs() == null
|| profile.getFormat() == null) {
return false;
}
// Check this is a video element
if (profile.getMediaElement().getType() != MediaElementType.VIDEO) {
return false;
}
// If there are no streams to process we are done
if (profile.getMediaElement().getSubtitleStreams() == null) {
return true;
}
// Process each subtitle stream
List<SubtitleTranscode> transcodes = new ArrayList<>();
for (SubtitleStream stream : profile.getMediaElement().getSubtitleStreams()) {
String codec = null;
boolean hardcode = false;
if (isSupported(profile.getCodecs(), stream.getFormat())
&& isSupported(getCodecsForFormat(profile.getFormat()), stream.getFormat())) {
codec = "copy";
} else if (isSupported(SUPPORTED_SUBTITLE_CODECS, stream.getFormat())) {
codec = stream.getFormat();
hardcode = true;
}
// Enable forced subtitles by default
if (stream.isForced() && profile.getSubtitleTrack() == null) {
profile.setSubtitleTrack(stream.getStream());
}
transcodes.add(new SubtitleTranscode(codec, hardcode));
}
// Update profile
profile.setSubtitleTranscodes(transcodes.toArray(new SubtitleTranscode[transcodes.size()]));
return true;
}