/**
* Internal helper to fork a process with handbrake and read the values from the process
*
* @param videoTranscoding
* @return true: all ok; false: an error happend along the way
*/
private boolean forkTranscodingProcess(VideoTranscoding videoTranscoding) {
OLATResource video = videoTranscoding.getVideoResource();
VideoModule videoModule = CoreSpringFactory.getImpl(VideoModule.class);
VideoManager videoManager = CoreSpringFactory.getImpl(VideoManager.class);
File masterFile = videoManager.getVideoFile(video);
File transcodingFolder =
((LocalFolderImpl) videoManager.getTranscodingContainer(video)).getBasefile();
File transcodedFile =
new File(
transcodingFolder,
Integer.toString(videoTranscoding.getResolution()) + masterFile.getName());
// mark this as beeing transcoded by this local transcoder
videoTranscoding.setTranscoder(VideoTranscoding.TRANSCODER_LOCAL);
videoTranscoding = videoManager.updateVideoTranscoding(videoTranscoding);
ArrayList<String> cmd = new ArrayList<>();
String tasksetConfig = videoModule.getTranscodingTasksetConfig();
if (tasksetConfig != null && !"Mac OS X".equals(System.getProperty("os.name"))) {
cmd.add("taskset");
cmd.add("-c");
cmd.add(tasksetConfig);
}
cmd.add("HandBrakeCLI");
cmd.add("-i");
cmd.add(masterFile.getAbsolutePath());
cmd.add("-o");
cmd.add(transcodedFile.getAbsolutePath());
cmd.add("--optimize");
cmd.add("--preset");
cmd.add("Normal");
cmd.add("--height");
cmd.add(Integer.toString(videoTranscoding.getResolution()));
cmd.add("--deinterlace");
cmd.add("--crop");
cmd.add("0:0:0:0");
Process process = null;
try {
if (log.isDebug()) {
log.debug(cmd.toString());
}
ProcessBuilder builder = new ProcessBuilder(cmd);
process = builder.start();
return updateVideoTranscodingFromProcessOutput(process, videoTranscoding, transcodedFile);
} catch (IOException e) {
log.error("Could not spawn convert sub process", e);
return false;
} finally {
if (process != null) {
process.destroy();
process = null;
}
}
}
private boolean mayTranscode(int resolution) {
if (!videoModule.isTranscodingEnabled()) {
return false;
}
int[] transcodingRes = videoModule.getTranscodingResolutions();
for (int i = 0; i < transcodingRes.length; i++) {
if (resolution == transcodingRes[i]) {
return true;
}
}
return false;
}
/**
* Implementation of job execution
*
* @param context
* @return
* @throws JobExecutionException
*/
private boolean doExecute(JobExecutionContext context) throws JobExecutionException {
VideoModule videoModule = CoreSpringFactory.getImpl(VideoModule.class);
if (!videoModule.isTranscodingLocal()) {
log.debug("Skipping execution of video transcoding job, local transcoding disabled");
return false;
}
// Find first one to work with
VideoManager videoManager = CoreSpringFactory.getImpl(VideoManager.class);
List<VideoTranscoding> videoTranscodings =
videoManager.getVideoTranscodingsPendingAndInProgress();
VideoTranscoding videoTranscoding = null;
for (VideoTranscoding videoTrans : videoTranscodings) {
String transcoder = videoTrans.getTranscoder();
if (transcoder == null) {
log.info(
"Start transcoding video with resolution::"
+ videoTrans.getResolution()
+ " for video resource::"
+ videoTrans.getVideoResource().getResourceableId());
videoTrans.setTranscoder(VideoTranscoding.TRANSCODER_LOCAL);
videoTranscoding = videoManager.updateVideoTranscoding(videoTrans);
break;
} else if (transcoder.equals(VideoTranscoding.TRANSCODER_LOCAL)) {
log.info(
"Continue with transcoding video with resolution::"
+ videoTrans.getResolution()
+ " for video resource::"
+ videoTrans.getVideoResource().getResourceableId());
videoTranscoding = videoTrans;
break;
}
}
if (videoTranscoding == null) {
log.debug(
"Skipping execution of video transcoding job, no pending video transcoding found in database");
return false;
}
// Ready transcode, forke process now
boolean success = forkTranscodingProcess(videoTranscoding);
// Transcoding done, call execution again until no more videos to be
// processed. If an error happend, don't continue to not get into a loop
if (success) {
success = doExecute(context);
}
return success;
}
