February 16, 2017

FDK AAC encoder and decoder in Nimble Transcoder

Live Transcoder for Nimble Streamer has full support for AAC decoding and encoding, along with various audio filters like re-sampling, transrating or audio channels manipulations.

Now we add FDK AAC support for both decoding and encoding. It allows adding HE-AAC and HE-AACv2 to your transcoding scenarios. This is also another alternative to ffmpeg decoder for audio streams, while having decent quality.

Let's see how you can set up FDK usage in your scenarios.

February 14, 2017

Forward CEA-708 subtitles with Nimble Streamer

Providing subtitles as part of live streaming is important and is required by law is some countries. So people ask adding that capability into Nimble Streamer in addition to VOD subtitles support.

There are cases when source stream which comes into Nimble Streamer already contains subtitles metainformation. So now Nimble allows forwarding CEA-708 subtitles. This means that all outgoing streams for all supported protocols will include subtitles.

This works for both transmuxing and transcoding.

Transmuxing support this forwarding by default. Whatever metainformation is inserted into the original stream, it is passed through to all other protocols.

To make this work in Live Transcoder scenarios, you need to enable this feature for outgoing streams. It's a premium add-on for this media server and it has easy-to-use web UI to control transcoding behavior. To install and get a license for it, visit this page.
To enable this feature fr particular encoded stream, you need to edit an encoder block for the stream which you want subtitles to be forwarded for.

Transcoder scenario

Click on encoder details icon to open encoder details dialog.

Enable "Forward CEA708 subtitles" for encoder

Check the Forward CEA-708 subtitles box and save settings to close the dialog. Then click Save on scenario age to apply it on server.

That's it - the forwarding will start working right after a scenario is saved on server.


Feel free to visit Live Transcoder webpage for other transcoding features description and contact us if you have any question.

Related documentation


Handling live streams timing errors in Nimble Streamer DVR

Sometimes when an MPEG-TS stream is received from media source, it may have some glitches either in video or audio. This is caused by third-party encoders which set incorrect time stamps assigned to media fragments - they may go back and forth in some un-predicted range. This also happens even when the source stream is transmuxed into other protocols, e.g. RTMP.

This may bother the viewers and also cause media servers to malfunction during the recording of the stream. Nimble Streamer allows compensating those timing issues and perform correct recording of video and audio in DVR. If the compensation can't help, then Nimble just removes the chunk and resets recording period.

Go to Nimble Streamer top menu, select Live Streams Settings menu and select DVR tab to open its settings.

Choose the designated stream properties and find Error correction section and check Drop invalid segments checkbox. This will perform the required correction to the recorded media, and the playback will be smooth from player point of view.

DVR setup with invalid segments handling



If you have any further questions, contact our team.

Related documentation


February 9, 2017

Viewing ASN statistics for streaming connections

A number of our large customers build and maintain their own media content deliver networks. Common layout includes origin servers to process the content from its sources and edge servers which handle connections from end-users who watch and listen the media.

It's important to locate edges as close to possible viewers as possible to reduce latency and improve overall user experience. So you need a way to determine optimal physical location for each edge. This is why it's important to know what ASNs your viewers have. That will allow putting your edges on a proper hosting location with proper network peers.

WMSPanel allows showing ASN statistics of your views showing how many connections were made with from the most active ASNs. It's part of our media servers reporting framework.

January 25, 2017

Binding un-synced video and audio sources in Live Transcoder

Live Transcoder for Nimble Streamer has wide range of content transformation features which can be used in transcoding scenarios.

Some scenarios may require to take unrelated and un-synchronized sources of content and bind them together into a synchronized stream. This capability covers some major use cases like the following to name just a few:

  • YouTube does't accept audio-only and video-only content, so you need to add missing video/audio in order to comply.
  • Take video stream (e.g. a game footage) and put commentator's voice on top.
  • Online radio graphics overlay: take Icecast online radio stream, put still picture as video and publish it on a website or an external CDN so common video player could play sound and has was visual representation.
  • Take surveillance camera video stream, insert some sound of silence from MP3 or MP4 file and publish it to external destination - like aforementioned YouTube or CDN.

Nimble Streamer Transcoder is currently capable of both transforming file content for further live streaming usage and synchronizing it. Let's see how you can do this.

January 1, 2017

Year of 2016 overview

Happy New Year!


We wish you and your company all the best in the new year of 2017!

To celebrate this upcoming year, we would like to make a summary of what was done during past 12 months of 2016.

You might have noticed the mention of Softvelum, LLC in many updates. That's right - we've grown from a startup established in 2011 into a technology company so this incorporation was performed to build a platform for further activities. We've been strengthening our team this year and we're ready for new challenges!
As a company, we're honored to have Nimble Streamer as a finalist of Streaming Media Europe Readers Choice Awards 2016 in the "Best Streaming Innovation" nomination!
We appreciate this acknowledgment and we'd like to thank everyone who voted for us.

Before getting into products summary, let's take a look at the State of Streaming Protocols for 2016. It shows current status of streaming technologies and compares it to the data back from 2015.

Now, let's see what was new in our products set.

Nimble Streamer


Our flagship product was continuously improved through the year. Here are most notable enhancements from what was implemented.

Nimble Streamer is now available for ARM architecture and its installation packages are built for for Raspberry Pi / Orange Pi / Odroid.
Read this page for all details regarding Nimble Streamer embedding capabilities.

Transmuxing engine was improved to improve performance and take more codecs as input. New codecs include H.265, VP6, VP8 and VP9 as video input with AC3, E-AC3, Speex and PCM G.711 for audio input. This gives more capabilities for broadcasters who receive media from various source and want to bring it to the internet viewers.

Icecast transmuxing was also added into common engine and now it allows taking AAC audio from any input stream and deliver it both as playback stream and as republished stream. You can also define metadata for any outgoing Icecast stream. Read more about current audio streaming feature set here.

DVR feature set was also improved through the year to improve performance and also get timeshift scheduled recording.

Subtitles support was added for VOD streaming to follow with multiple customers requests.

Nimble control API was significantly improved, it now covers full set of operations that are available via web UI. Also, Nimble status native API was updates with new calls.

Server control capabilities can now be granted to non-admin users by account administrators.

Paywall framework for Nimble Streamer was also improved with new blocking capabilities: by User agents and by Referer HTTP headers.

One more significant feature is Publish Control Framework. It allow setting full control over RTMP and RTSP streams publication process - you can apply your own business logic to any incoming streams. This is especially useful for people who create their own mobile broadcasting services as they need to find a way to control their content contributors.

Live Transcoder


We had many questions from our customers about content transformation in Nimble Streamer - like changing resolution, bitrate, graphics overlay and many other. So after technical and legal research, we've released Live Transcoder. It's a premium addition for freeware media server available via license subscription.

It supports multiple video and audio codecs for decode and encodes it into H.264/AAC output streams with codecs passthrough option.

After the content is decoded you can also apply wide variety of FFmpeg filters to transform the content as you need for your live stream. This includes changing the resolution, bitrate, profile, applying graphics overlay, adding picture-in-picture video and much more.

All operations are performed via excelled drag-n-drop web UI, you can check this playlist of videos to see it in action.

Besides software decoding and encoding, Live Transcoder supports Intel QuickSync and NVidia GPU hardware acceleration technologies. This allows combining flexible filtering, excellent UI and best hardware transcoding technologies into a single powerful product.

Visit Live Transcoder website to learn more about its capabilities.

Mobile SDK


Larix mobile broadcasting SDK was extremely popular during this year.

We improved feature sets for both iOS and Android to add highly required features - you can see list of major features here and also check Larix Broadcaster to see them in action.

After multiple requests we've released our mobile streaming SDK for Windows Mobile platform along with Larix Broadcaster WinPhone version. So now our SDK covers all popular mobile platforms.

We also used our streaming library in new app called Larix Screencaster - it's an Android application that allows streaming the content of your screen. This is helpful for game streamers, educators and all those who need to share their device screens to wide audience.

You can obtain latest SDKs using this purchase page in just a couple of steps .

WMSPanel


Our reporting and control panel was also improved with a new set of metric - Unique visitors. It allows calculating how many actual users were viewing your content within each slice and each file or stream in case of Deep stats usage.

WMSPanel stats API was also improved to return all available metrics with more convenient methods.


These are the basic updates but we've done a lot more than that - check our blog and website for more. You can use the new Search page which covers our resources.




We'll continue keeping you up-to-date with all new features and improvements.
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