Examples with NotFoundException org.opencastproject.util.NotFoundException used on opensource projects

Example 71 with NotFoundException

use of org.opencastproject.util.NotFoundException in project opencast by opencast.

the class ConcatWorkflowOperationHandler method concat.

private WorkflowOperationResult concat(MediaPackage src, WorkflowOperationInstance operation) throws EncoderException, IOException, NotFoundException, MediaPackageException, WorkflowOperationException {
    MediaPackage mediaPackage = (MediaPackage) src.clone();
    Map<Integer, Tuple<TrackSelector, Boolean>> trackSelectors = getTrackSelectors(operation);
    String outputResolution = StringUtils.trimToNull(operation.getConfiguration(OUTPUT_RESOLUTION));
    String outputFrameRate = StringUtils.trimToNull(operation.getConfiguration(OUTPUT_FRAMERATE));
    String encodingProfile = StringUtils.trimToNull(operation.getConfiguration(ENCODING_PROFILE));
    // Skip the worklow if no source-flavors or tags has been configured
    if (trackSelectors.isEmpty()) {
        logger.warn("No source-tags or source-flavors has been set.");
        return createResult(mediaPackage, Action.SKIP);
    }
    String targetTagsOption = StringUtils.trimToNull(operation.getConfiguration(TARGET_TAGS));
    String targetFlavorOption = StringUtils.trimToNull(operation.getConfiguration(TARGET_FLAVOR));
    // Target tags
    List<String> targetTags = asList(targetTagsOption);
    // Target flavor
    if (targetFlavorOption == null)
        throw new WorkflowOperationException("Target flavor must be set!");
    // Find the encoding profile
    if (encodingProfile == null)
        throw new WorkflowOperationException("Encoding profile must be set!");
    EncodingProfile profile = composerService.getProfile(encodingProfile);
    if (profile == null)
        throw new WorkflowOperationException("Encoding profile '" + encodingProfile + "' was not found");
    // Output resolution
    if (outputResolution == null)
        throw new WorkflowOperationException("Output resolution must be set!");
    Dimension outputDimension = null;
    if (outputResolution.startsWith(OUTPUT_PART_PREFIX)) {
        if (!trackSelectors.keySet().contains(Integer.parseInt(outputResolution.substring(OUTPUT_PART_PREFIX.length()))))
            throw new WorkflowOperationException("Output resolution part not set!");
    } else {
        try {
            String[] outputResolutionArray = StringUtils.split(outputResolution, "x");
            if (outputResolutionArray.length != 2) {
                throw new WorkflowOperationException("Invalid format of output resolution!");
            }
            outputDimension = Dimension.dimension(Integer.parseInt(outputResolutionArray[0]), Integer.parseInt(outputResolutionArray[1]));
        } catch (WorkflowOperationException e) {
            throw e;
        } catch (Exception e) {
            throw new WorkflowOperationException("Unable to parse output resolution!", e);
        }
    }
    float fps = -1.0f;
    if (StringUtils.isNotEmpty(outputFrameRate)) {
        if (StringUtils.startsWith(outputFrameRate, OUTPUT_PART_PREFIX)) {
            if (!NumberUtils.isNumber(outputFrameRate.substring(OUTPUT_PART_PREFIX.length())) || !trackSelectors.keySet().contains(Integer.parseInt(outputFrameRate.substring(OUTPUT_PART_PREFIX.length())))) {
                throw new WorkflowOperationException("Output frame rate part not set or invalid!");
            }
        } else if (NumberUtils.isNumber(outputFrameRate)) {
            fps = NumberUtils.toFloat(outputFrameRate);
        } else {
            throw new WorkflowOperationException("Unable to parse output frame rate!");
        }
    }
    MediaPackageElementFlavor targetFlavor = null;
    try {
        targetFlavor = MediaPackageElementFlavor.parseFlavor(targetFlavorOption);
        if ("*".equals(targetFlavor.getType()) || "*".equals(targetFlavor.getSubtype()))
            throw new WorkflowOperationException("Target flavor must have a type and a subtype, '*' are not allowed!");
    } catch (IllegalArgumentException e) {
        throw new WorkflowOperationException("Target flavor '" + targetFlavorOption + "' is malformed");
    }
    List<Track> tracks = new ArrayList<Track>();
    for (Entry<Integer, Tuple<TrackSelector, Boolean>> trackSelector : trackSelectors.entrySet()) {
        Collection<Track> tracksForSelector = trackSelector.getValue().getA().select(mediaPackage, false);
        String currentFlavor = StringUtils.join(trackSelector.getValue().getA().getFlavors());
        String currentTag = StringUtils.join(trackSelector.getValue().getA().getTags());
        if (tracksForSelector.size() > 1) {
            logger.warn("More than one track has been found with flavor '{}' and/or tag '{}' for concat operation, skipping concatenation!", currentFlavor, currentTag);
            return createResult(mediaPackage, Action.SKIP);
        } else if (tracksForSelector.size() == 0 && trackSelector.getValue().getB()) {
            logger.warn("No track has been found with flavor '{}' and/or tag '{}' for concat operation, skipping concatenation!", currentFlavor, currentTag);
            return createResult(mediaPackage, Action.SKIP);
        } else if (tracksForSelector.size() == 0 && !trackSelector.getValue().getB()) {
            logger.info("No track has been found with flavor '{}' and/or tag '{}' for concat operation, skipping track!", currentFlavor, currentTag);
            continue;
        }
        for (Track t : tracksForSelector) {
            tracks.add(t);
            VideoStream[] videoStreams = TrackSupport.byType(t.getStreams(), VideoStream.class);
            if (videoStreams.length == 0) {
                logger.info("No video stream available in the track with flavor {}! {}", currentFlavor, t);
                return createResult(mediaPackage, Action.SKIP);
            }
            if (StringUtils.startsWith(outputResolution, OUTPUT_PART_PREFIX) && NumberUtils.isNumber(outputResolution.substring(OUTPUT_PART_PREFIX.length())) && trackSelector.getKey() == Integer.parseInt(outputResolution.substring(OUTPUT_PART_PREFIX.length()))) {
                outputDimension = new Dimension(videoStreams[0].getFrameWidth(), videoStreams[0].getFrameHeight());
                if (!trackSelector.getValue().getB()) {
                    logger.warn("Output resolution track {} must be mandatory, skipping concatenation!", outputResolution);
                    return createResult(mediaPackage, Action.SKIP);
                }
            }
            if (fps <= 0 && StringUtils.startsWith(outputFrameRate, OUTPUT_PART_PREFIX) && NumberUtils.isNumber(outputFrameRate.substring(OUTPUT_PART_PREFIX.length())) && trackSelector.getKey() == Integer.parseInt(outputFrameRate.substring(OUTPUT_PART_PREFIX.length()))) {
                fps = videoStreams[0].getFrameRate();
            }
        }
    }
    if (tracks.size() == 0) {
        logger.warn("No tracks found for concating operation, skipping concatenation!");
        return createResult(mediaPackage, Action.SKIP);
    } else if (tracks.size() == 1) {
        Track track = (Track) tracks.get(0).clone();
        track.setIdentifier(null);
        addNewTrack(mediaPackage, track, targetTags, targetFlavor);
        logger.info("At least two tracks are needed for the concating operation, skipping concatenation!");
        return createResult(mediaPackage, Action.SKIP);
    }
    Job concatJob;
    if (fps > 0) {
        concatJob = composerService.concat(profile.getIdentifier(), outputDimension, fps, tracks.toArray(new Track[tracks.size()]));
    } else {
        concatJob = composerService.concat(profile.getIdentifier(), outputDimension, tracks.toArray(new Track[tracks.size()]));
    }
    // Wait for the jobs to return
    if (!waitForStatus(concatJob).isSuccess())
        throw new WorkflowOperationException("The concat job did not complete successfully");
    if (concatJob.getPayload().length() > 0) {
        Track concatTrack = (Track) MediaPackageElementParser.getFromXml(concatJob.getPayload());
        concatTrack.setURI(workspace.moveTo(concatTrack.getURI(), mediaPackage.getIdentifier().toString(), concatTrack.getIdentifier(), "concat." + FilenameUtils.getExtension(concatTrack.getURI().toString())));
        addNewTrack(mediaPackage, concatTrack, targetTags, targetFlavor);
        WorkflowOperationResult result = createResult(mediaPackage, Action.CONTINUE, concatJob.getQueueTime());
        logger.debug("Concat operation completed");
        return result;
    } else {
        logger.info("concat operation unsuccessful, no payload returned: {}", concatJob);
        return createResult(mediaPackage, Action.SKIP);
    }
}

Example 72 with NotFoundException

use of org.opencastproject.util.NotFoundException in project opencast by opencast.

the class EventsLoader method addDublinCoreCatalog.

private MediaPackage addDublinCoreCatalog(InputStream in, MediaPackageElementFlavor flavor, MediaPackage mediaPackage) throws IOException {
    try {
        String elementId = UUID.randomUUID().toString();
        URI catalogUrl = workspace.put(mediaPackage.getIdentifier().compact(), elementId, "dublincore.xml", in);
        logger.info("Adding catalog with flavor {} to mediapackage {}", flavor, mediaPackage);
        MediaPackageElement mpe = mediaPackage.add(catalogUrl, MediaPackageElement.Type.Catalog, flavor);
        mpe.setIdentifier(elementId);
        mpe.setChecksum(Checksum.create(ChecksumType.DEFAULT_TYPE, workspace.get(catalogUrl)));
        return mediaPackage;
    } catch (NotFoundException e) {
        throw new RuntimeException(e);
    }
}

Example 73 with NotFoundException

use of org.opencastproject.util.NotFoundException in project opencast by opencast.

the class ComposerRestServiceTest method testProfiles.

@Test
public void testProfiles() throws Exception {
    Response response = restService.getProfile(profileId);
    Assert.assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
    Assert.assertEquals(profile, response.getEntity());
    try {
        restService.getProfile("some other ID");
        Assert.fail("This ID should cause the rest endpoint to throw");
    } catch (NotFoundException e) {
    // expected
    }
    EncodingProfileList list = restService.listProfiles();
    Assert.assertEquals(profileList, list);
}

Example 74 with NotFoundException

use of org.opencastproject.util.NotFoundException in project opencast by opencast.

the class VideoSegmenterServiceImpl method segment.

/**
 * Starts segmentation on the video track identified by
 * <code>mediapackageId</code> and <code>elementId</code> and returns a
 * receipt containing the final result in the form of anMpeg7Catalog.
 *
 * @param track
 *            the element to analyze
 * @return a receipt containing the resulting mpeg-7 catalog
 * @throws VideoSegmenterException
 */
protected Catalog segment(Job job, Track track) throws VideoSegmenterException, MediaPackageException {
    // implementation
    if (!track.hasVideo()) {
        logger.warn("Element {} is not a video track", track);
        throw new VideoSegmenterException("Element is not a video track");
    }
    try {
        Mpeg7Catalog mpeg7;
        File mediaFile = null;
        URL mediaUrl = null;
        try {
            mediaFile = workspace.get(track.getURI());
            mediaUrl = mediaFile.toURI().toURL();
        } catch (NotFoundException e) {
            throw new VideoSegmenterException("Error finding the video file in the workspace", e);
        } catch (IOException e) {
            throw new VideoSegmenterException("Error reading the video file in the workspace", e);
        }
        if (track.getDuration() == null)
            throw new MediaPackageException("Track " + track + " does not have a duration");
        logger.info("Track {} loaded, duration is {} s", mediaUrl, track.getDuration() / 1000);
        MediaTime contentTime = new MediaRelTimeImpl(0, track.getDuration());
        MediaLocator contentLocator = new MediaLocatorImpl(track.getURI());
        Video videoContent;
        logger.debug("changesThreshold: {}, stabilityThreshold: {}", changesThreshold, stabilityThreshold);
        logger.debug("prefNumber: {}, maxCycles: {}", prefNumber, maxCycles);
        boolean endOptimization = false;
        int cycleCount = 0;
        LinkedList<Segment> segments;
        LinkedList<OptimizationStep> optimizationList = new LinkedList<OptimizationStep>();
        LinkedList<OptimizationStep> unusedResultsList = new LinkedList<OptimizationStep>();
        OptimizationStep stepBest = new OptimizationStep();
        // local copy of changesThreshold, that can safely be changed over optimization iterations
        float changesThresholdLocal = changesThreshold;
        // local copies of prefNumber, absoluteMin and absoluteMax, to make a dependency on track length possible
        int prefNumberLocal = prefNumber;
        int absoluteMaxLocal = absoluteMax;
        int absoluteMinLocal = absoluteMin;
        // absoluteMax and absoluteMin with the duration of the track
        if (durationDependent) {
            double trackDurationInHours = track.getDuration() / 3600000.0;
            prefNumberLocal = (int) Math.round(trackDurationInHours * prefNumberLocal);
            absoluteMaxLocal = (int) Math.round(trackDurationInHours * absoluteMax);
            absoluteMinLocal = (int) Math.round(trackDurationInHours * absoluteMin);
            // make sure prefNumberLocal will never be 0 or negative
            if (prefNumberLocal <= 0) {
                prefNumberLocal = 1;
            }
            logger.info("Numbers of segments are set to be relative to track duration. Therefore for {} the preferred " + "number of segments is {}", mediaUrl, prefNumberLocal);
        }
        logger.info("Starting video segmentation of {}", mediaUrl);
        // to the desired number of segments
        while (!endOptimization) {
            mpeg7 = mpeg7CatalogService.newInstance();
            videoContent = mpeg7.addVideoContent("videosegment", contentTime, contentLocator);
            // run the segmentation with FFmpeg
            segments = runSegmentationFFmpeg(track, videoContent, mediaFile, changesThresholdLocal);
            // calculate errors for "normal" and filtered segmentation
            // and compare them to find better optimization.
            // "normal"
            OptimizationStep currentStep = new OptimizationStep(stabilityThreshold, changesThresholdLocal, segments.size(), prefNumberLocal, mpeg7, segments);
            // filtered
            LinkedList<Segment> segmentsNew = new LinkedList<Segment>();
            OptimizationStep currentStepFiltered = new OptimizationStep(stabilityThreshold, changesThresholdLocal, 0, prefNumberLocal, filterSegmentation(segments, track, segmentsNew, stabilityThreshold * 1000), segments);
            currentStepFiltered.setSegmentNumAndRecalcErrors(segmentsNew.size());
            logger.info("Segmentation yields {} segments after filtering", segmentsNew.size());
            OptimizationStep currentStepBest;
            // - and the filtered segmentation is not already better than the maximum error
            if (currentStep.getErrorAbs() <= currentStepFiltered.getErrorAbs() || (segmentsNew.size() < prefNumberLocal && currentStep.getSegmentNum() > (track.getDuration() / 1000.0f) / (stabilityThreshold / 2) && !(currentStepFiltered.getErrorAbs() <= maxError))) {
                optimizationList.add(currentStep);
                Collections.sort(optimizationList);
                currentStepBest = currentStep;
                unusedResultsList.add(currentStepFiltered);
            } else {
                optimizationList.add(currentStepFiltered);
                Collections.sort(optimizationList);
                currentStepBest = currentStepFiltered;
            }
            cycleCount++;
            logger.debug("errorAbs = {}, error = {}", currentStep.getErrorAbs(), currentStep.getError());
            logger.debug("changesThreshold = {}", changesThresholdLocal);
            logger.debug("cycleCount = {}", cycleCount);
            // end optimization if maximum number of cycles is reached or if the segmentation is good enough
            if (cycleCount >= maxCycles || currentStepBest.getErrorAbs() <= maxError) {
                endOptimization = true;
                if (optimizationList.size() > 0) {
                    if (optimizationList.getFirst().getErrorAbs() <= optimizationList.getLast().getErrorAbs() && optimizationList.getFirst().getError() >= 0) {
                        stepBest = optimizationList.getFirst();
                    } else {
                        stepBest = optimizationList.getLast();
                    }
                }
                // just to be sure, check if one of the unused results was better
                for (OptimizationStep currentUnusedStep : unusedResultsList) {
                    if (currentUnusedStep.getErrorAbs() < stepBest.getErrorAbs()) {
                        stepBest = unusedResultsList.getFirst();
                    }
                }
            // continue optimization, calculate new changes threshold for next iteration of optimization
            } else {
                OptimizationStep first = optimizationList.getFirst();
                OptimizationStep last = optimizationList.getLast();
                // estimate a new changesThreshold based on the one yielding the smallest error
                if (optimizationList.size() == 1 || first.getError() < 0 || last.getError() > 0) {
                    if (currentStepBest.getError() >= 0) {
                        // if the error is smaller or equal to 1, increase changes threshold weighted with the error
                        if (currentStepBest.getError() <= 1) {
                            changesThresholdLocal += changesThresholdLocal * currentStepBest.getError();
                        } else {
                            // to faster reach reasonable segment numbers
                            if (cycleCount <= 1 && currentStep.getSegmentNum() > 2000) {
                                changesThresholdLocal = 0.2f;
                            // if the error is bigger than one, double the changes threshold, because multiplying
                            // with a large error can yield a much too high changes threshold
                            } else {
                                changesThresholdLocal *= 2;
                            }
                        }
                    } else {
                        changesThresholdLocal /= 2;
                    }
                    logger.debug("onesided optimization yields new changesThreshold = {}", changesThresholdLocal);
                // if there are already iterations with positive and negative errors, choose a changesThreshold between those
                } else {
                    // for simplicity a linear relationship between the changesThreshold
                    // and the number of generated segments is assumed and based on that
                    // the expected correct changesThreshold is calculated
                    // the new changesThreshold is calculated by averaging the the mean and the mean weighted with errors
                    // because this seemed to yield better results in several cases
                    float x = (first.getSegmentNum() - prefNumberLocal) / (float) (first.getSegmentNum() - last.getSegmentNum());
                    float newX = ((x + 0.5f) * 0.5f);
                    changesThresholdLocal = first.getChangesThreshold() * (1 - newX) + last.getChangesThreshold() * newX;
                    logger.debug("doublesided optimization yields new changesThreshold = {}", changesThresholdLocal);
                }
            }
        }
        // after optimization of the changes threshold, the minimum duration for a segment
        // (stability threshold) is optimized if the result is still not good enough
        int threshLow = stabilityThreshold * 1000;
        int threshHigh = threshLow + (threshLow / 2);
        LinkedList<Segment> tmpSegments;
        float smallestError = Float.MAX_VALUE;
        int bestI = threshLow;
        segments = stepBest.getSegments();
        // is smaller than the maximum error, the stability threshold will not be optimized
        if (stepBest.getError() <= maxError) {
            threshHigh = stabilityThreshold * 1000;
        }
        for (int i = threshLow; i <= threshHigh; i = i + 1000) {
            tmpSegments = new LinkedList<Segment>();
            filterSegmentation(segments, track, tmpSegments, i);
            float newError = OptimizationStep.calculateErrorAbs(tmpSegments.size(), prefNumberLocal);
            if (newError < smallestError) {
                smallestError = newError;
                bestI = i;
            }
        }
        tmpSegments = new LinkedList<Segment>();
        mpeg7 = filterSegmentation(segments, track, tmpSegments, bestI);
        // for debugging: output of final segmentation after optimization
        logger.debug("result segments:");
        for (int i = 0; i < tmpSegments.size(); i++) {
            int[] tmpLog2 = new int[7];
            tmpLog2[0] = tmpSegments.get(i).getMediaTime().getMediaTimePoint().getHour();
            tmpLog2[1] = tmpSegments.get(i).getMediaTime().getMediaTimePoint().getMinutes();
            tmpLog2[2] = tmpSegments.get(i).getMediaTime().getMediaTimePoint().getSeconds();
            tmpLog2[3] = tmpSegments.get(i).getMediaTime().getMediaDuration().getHours();
            tmpLog2[4] = tmpSegments.get(i).getMediaTime().getMediaDuration().getMinutes();
            tmpLog2[5] = tmpSegments.get(i).getMediaTime().getMediaDuration().getSeconds();
            Object[] tmpLog1 = { tmpLog2[0], tmpLog2[1], tmpLog2[2], tmpLog2[3], tmpLog2[4], tmpLog2[5], tmpLog2[6] };
            tmpLog1[6] = tmpSegments.get(i).getIdentifier();
            logger.debug("s:{}:{}:{}, d:{}:{}:{}, {}", tmpLog1);
        }
        logger.info("Optimized Segmentation yields (after {} iteration" + (cycleCount == 1 ? "" : "s") + ") {} segments", cycleCount, tmpSegments.size());
        // if no reasonable segmentation could be found, instead return a uniform segmentation
        if (tmpSegments.size() < absoluteMinLocal || tmpSegments.size() > absoluteMaxLocal) {
            mpeg7 = uniformSegmentation(track, tmpSegments, prefNumberLocal);
            logger.info("Since no reasonable segmentation could be found, a uniform segmentation was created");
        }
        Catalog mpeg7Catalog = (Catalog) MediaPackageElementBuilderFactory.newInstance().newElementBuilder().newElement(Catalog.TYPE, MediaPackageElements.SEGMENTS);
        URI uri;
        try {
            uri = workspace.putInCollection(COLLECTION_ID, job.getId() + ".xml", mpeg7CatalogService.serialize(mpeg7));
        } catch (IOException e) {
            throw new VideoSegmenterException("Unable to put the mpeg7 catalog into the workspace", e);
        }
        mpeg7Catalog.setURI(uri);
        logger.info("Finished video segmentation of {}", mediaUrl);
        return mpeg7Catalog;
    } catch (Exception e) {
        logger.warn("Error segmenting " + track, e);
        if (e instanceof VideoSegmenterException) {
            throw (VideoSegmenterException) e;
        } else {
            throw new VideoSegmenterException(e);
        }
    }
}

Example 75 with NotFoundException

use of org.opencastproject.util.NotFoundException in project opencast by opencast.

the class WaveformServiceImpl method extractWaveform.

/**
 * Create and run waveform extraction ffmpeg command.
 *
 * @param track source audio/video track with at least one audio channel
 * @return waveform image attachment
 * @throws WaveformServiceException if processing fails
 */
private Attachment extractWaveform(Track track) throws WaveformServiceException {
    if (!track.hasAudio()) {
        throw new WaveformServiceException("Track has no audio");
    }
    // copy source file into workspace
    File mediaFile;
    try {
        mediaFile = workspace.get(track.getURI());
    } catch (NotFoundException e) {
        throw new WaveformServiceException("Error finding the media file in the workspace", e);
    } catch (IOException e) {
        throw new WaveformServiceException("Error reading the media file in the workspace", e);
    }
    String waveformFilePath = FilenameUtils.removeExtension(mediaFile.getAbsolutePath()).concat('-' + track.getIdentifier()).concat("-waveform.png");
    // create ffmpeg command
    String[] command = new String[] { binary, "-nostats", "-i", mediaFile.getAbsolutePath(), "-lavfi", createWaveformFilter(track), "-an", "-vn", "-sn", "-y", waveformFilePath };
    logger.debug("Start waveform ffmpeg process: {}", StringUtils.join(command, " "));
    logger.info("Create waveform image file for track '{}' at {}", track.getIdentifier(), waveformFilePath);
    // run ffmpeg
    ProcessBuilder pb = new ProcessBuilder(command);
    pb.redirectErrorStream(true);
    Process ffmpegProcess = null;
    int exitCode = 1;
    BufferedReader errStream = null;
    try {
        ffmpegProcess = pb.start();
        errStream = new BufferedReader(new InputStreamReader(ffmpegProcess.getInputStream()));
        String line = errStream.readLine();
        while (line != null) {
            logger.debug(line);
            line = errStream.readLine();
        }
        exitCode = ffmpegProcess.waitFor();
    } catch (IOException ex) {
        throw new WaveformServiceException("Start ffmpeg process failed", ex);
    } catch (InterruptedException ex) {
        throw new WaveformServiceException("Waiting for encoder process exited was interrupted unexpectly", ex);
    } finally {
        IoSupport.closeQuietly(ffmpegProcess);
        IoSupport.closeQuietly(errStream);
        if (exitCode != 0) {
            try {
                FileUtils.forceDelete(new File(waveformFilePath));
            } catch (IOException e) {
            // it is ok, no output file was generated by ffmpeg
            }
        }
    }
    if (exitCode != 0)
        throw new WaveformServiceException("The encoder process exited abnormally with exit code " + exitCode);
    // put waveform image into workspace
    FileInputStream waveformFileInputStream = null;
    URI waveformFileUri;
    try {
        waveformFileInputStream = new FileInputStream(waveformFilePath);
        waveformFileUri = workspace.putInCollection(COLLECTION_ID, FilenameUtils.getName(waveformFilePath), waveformFileInputStream);
        logger.info("Copied the created waveform to the workspace {}", waveformFileUri);
    } catch (FileNotFoundException ex) {
        throw new WaveformServiceException(String.format("Waveform image file '%s' not found", waveformFilePath), ex);
    } catch (IOException ex) {
        throw new WaveformServiceException(String.format("Can't write waveform image file '%s' to workspace", waveformFilePath), ex);
    } catch (IllegalArgumentException ex) {
        throw new WaveformServiceException(ex);
    } finally {
        IoSupport.closeQuietly(waveformFileInputStream);
        logger.info("Deleted local waveform image file at {}", waveformFilePath);
        FileUtils.deleteQuietly(new File(waveformFilePath));
    }
    // create media package element
    MediaPackageElementBuilder mpElementBuilder = MediaPackageElementBuilderFactory.newInstance().newElementBuilder();
    // it is up to the workflow operation handler to set the attachment flavor
    Attachment waveformMpe = (Attachment) mpElementBuilder.elementFromURI(waveformFileUri, Type.Attachment, track.getFlavor());
    waveformMpe.setIdentifier(IdBuilderFactory.newInstance().newIdBuilder().createNew().compact());
    return waveformMpe;
}