Preview for AUDIO and VIDEO files on DM

SergioFerreira_ — Fri, 18 Jul 2014 21:08:22 GMT

Is it possible to use the preview functionality using only the DM?

I know that it is possible for DOC, PDF and image files.

In the following picture you can see my example. I have a PDF, MOV, MP3 and DOC files. We can press the preview function only for PDF, and DOC(Office) files.

When I try to preview the MP3 and MOV files the message error is:

" Preview can not be generated for this document

Technical issue:

Blob path: files:files/1/file

org.nuxeo.ecm.platform.preview.api.PreviewException: Converter any2pdf is not available"

Re: Preview for AUDIO and VIDEO files on DM

Julien_Carsique — Mon, 21 Jul 2014 14:29:28 GMT

Hi,

This feature is provided by the DAM Marketplace Package. If you don't want the DAM interface, you can still try to deploy only the addons you're interested in: nuxeo-platform-audio and nuxeo-platform-video.

Re: Preview for AUDIO and VIDEO files on DM

SergioFerreira_ — Mon, 21 Jul 2014 15:24:35 GMT

Hi Julien

Re: Preview for AUDIO and VIDEO files on DM

Julien_Carsique — Thu, 24 Jul 2014 14:54:06 GMT

You're missing a third-party library (jaudiotagger-2.0.3.jar in that case) and probably a few others. That's the purpose of the Marketplace Package to also deploy the needed third-parties.

Re: Preview for AUDIO and VIDEO files on DM

SergioFerreira_ — Thu, 24 Jul 2014 16:50:32 GMT

Hi Julien

Re: Preview for AUDIO and VIDEO files on DM

Julien_Carsique — Tue, 29 Jul 2014 14:56:36 GMT

Hi,

Re: Preview for AUDIO and VIDEO files on DM

SergioFerreira_ — Thu, 04 Sep 2014 17:11:36 GMT

Hi.

We finish this job. The Solution was to create the VideoPreviewer and AudioPreviewer (they extends AbstractPreviewer class and implements MimeTypePreviewer class).

I followed the Nuxeo document ( http://doc.nuxeo.com/display/NXDOC/Preview?src=search#Preview-MimeTypePreviewerDetails ). I contributed with these Preview classes using a config file, like these examples http://explorer.nuxeo.org/nuxeo/site/distribution/current/viewExtensionPoint/org.nuxeo.ecm.platform.preview.adapter.PreviewAdapterManagerComponent--MimeTypePreviewer

VideoPreviewer.java


public List getPreview(Blob blob, DocumentModel dm) throws PreviewException {
        List blobResults = new ArrayList();

        // Collect video parameters and create the Video entity
        Video video = createVideo(blob);

        // Converting the Video to WebM
        TranscodedVideo videoTranscoded = videoService.convert(video, "WebM 480p");
        File transcodedBlobFile = BlobHelper.getFileFromBlob(videoTranscoded.getBlob());

        // Create the WEB_SERVER/tmp directory. We need it because the browser
        // do not allow open videos from local directory
        String tmpFolderPath = createTmpFolder();

        // Now we have to move the Transcoded file to tmp directory
        File newTranscodedBlobFile = new File(tmpFolderPath + "/" + transcodedBlobFile.getName());
        try {
            Files.move(transcodedBlobFile, newTranscodedBlobFile);
        } catch (IOException e1) {
            e1.printStackTrace();
        }

        //To get the transcode URL. We need it to append on the HTML code
        String transcodedUrl = createTrancodedUrl(newTranscodedBlobFile);

        try {
            StringBuffer htmlPage = new StringBuffer();

            htmlPage.append("");
            htmlPage.append("");
            htmlPage.append("");
            htmlPage.append("");
            htmlPage.append(dm.getName() + " - " + blob.getFilename());

            //Appending the videoJS (the video player and the transcoded URL) code into HTML page.
            htmlPage = appendVideoPlayer(htmlPage, transcodedUrl);

            htmlPage.append("");

            Blob mainBlob = new StringBlob(htmlPage.toString());
            mainBlob.setFilename("index.html");
            mainBlob.setMimeType("text/html");

            blobResults.add(mainBlob);
        } catch (Exception e) {
            throw new PreviewException("Unable to get document property", e);
        }

        return blobResults;
    }

AudioPreviewer.java


public List getPreview(Blob blob, DocumentModel dm) throws PreviewException {
        List blobResults = new ArrayList();

        File audioBlobFile = BlobHelper.getFileFromBlob(blob);

        // Create the WEB_SERVER/tmp directory. We need it because the browser
        // do not allow open audios from local directory
        String tmpFolderPath = createTmpFolder();

        // Now we have to copy the Transcoded file to tmp directory
        File newAudioBlobFile = new File(tmpFolderPath + "/" + audioBlobFile.getName());
        try {
            Files.copy(audioBlobFile, newAudioBlobFile);
        } catch (IOException e1) {
            e1.printStackTrace();
        }

        //To get the transcode URL. We need it to append on the HTML code
        String audioUrl = createAudioUrl(newAudioBlobFile);


        try {
            StringBuffer htmlPage = new StringBuffer();

            htmlPage.append("");
            htmlPage.append("");
            htmlPage.append("");
            htmlPage.append("");
            htmlPage.append(dm.getName() + " - " + blob.getFilename());

            //Appending the videoJS (the video player and the transcoded URL) code into HTML page.
            htmlPage = appendAudioPlayer(htmlPage, audioUrl);

            htmlPage.append("");

            Blob mainBlob = new StringBlob(htmlPage.toString());
            mainBlob.setFilename("index.html");
            mainBlob.setMimeType("text/html");

            blobResults.add(mainBlob);
        } catch (Exception e) {
            throw new PreviewException("Unable to get document property", e);
        }

        return blobResults;
    }

The result is: from every place where Nuxeo call the "Preview" action my classes are called. I'm just using the DAM jars (audio and video)

PS: I'm not sure if the VideoPreview conversion is the best solution, but it works.

Re: Preview for AUDIO and VIDEO files on DM

Julien_Carsique — Thu, 04 Sep 2014 18:30:27 GMT

Thank you for the feedback.

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