August 31, 2016

August news

In August we've added a few interesting features. But first...


Voting is now open for the 2016 Streaming Media Readers' Choice Awards.

If you like our products, please find them as follows:
  • Encoding Software: Nimble Transcoder
  • Media Server: Nimble Streamer
Both products are listed under our company name Softvelum. You must enter a valid email address when you vote; you will receive a confirmation email when voting closes on September 26. You must click the link in that confirmation email for your vote to count.
You can read more about nominations on this page and vote.


Nimble Streamer now supports subtitles for VOD streaming via WebVTT, SRT and TTML formats. This support includes both single subtitle files and multiple files via SMIL.
SMIL sample files can be found in a new githib repo.

Read this article for more details.


We also extended codecs coverage for Nimble Streamer.
We introduced support for PCM, or G711, (both a-law and μ-law) audio codec.
It can be used as input for Nimble Streamer Live Transcoder for further transformation into AAC.
It also can be used for RTSP transmuxing - it will be passed through from input to output.

Mobile SDK

Our mobile SDK for Android now has new application graphics and layout. It's a lot nicer now - get it on Google Play to check.

Get it on Google Play

You can get our mobile SDK here.

Next month we'll introduce new graphics for iOS as well.

Minor updates

For those who extensively uses WMPSanel API we added a code for sample API proxy on our github.

If you need to get more information for analysis when trying to solve some Nimble-related issue, check Logging levels article. Once you need more details - just use the level you need.

The last but not the least update: check the State of Streaming Protocols for August 2016.

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The State of Streaming Protocols - August 2016

WMSPanel team continues analyzing the state of streaming protocols.

The metrics calculations are based on 3.17 billion views. The stats are collected from 2800+ media servers (Nimble Streamer and Wowza).

Protocols share remain stable, i.e. HLS share is about 73% with progressive download near 11% and RTMP around 10%.

The State of Streaming Protocols, August 2016

You can compare that to July stats below.

August 23, 2016

Subtitles support for VOD

Nimble Streamer has wide VOD streaming feature set which covers many HLS-related capabilities like ABR streaming or multiple tracks support.

Now Nimble Streamer is capable of adding subtitles to VOD streams.
Supported formats include  WebVTT, SRT and TTML.

Let's see how they can be used. Major scenarios for VOD subtitles usage can be split into those two categories:

  • Simple scenario - a VOD file with one rendition has one corresponding language subtitles file. This is most common use case and it's handled in a simple way.
  • Complex scenarios like multiple languages for multiple renditions or other versions of the content. It's based on SMIL files usage and it can cover various use cases.
Let's take a look at both of them.

Server logging in Nimble Streamer

As any server software, Nimble Streamer allows tracking its behavior and performance via logging. You can have access logs and also have general server logging.

Access logs

Access log  show all users' requests. It's not logged by default, so in order to enable it, add this parameter into nimble.conf:
log_access = file
Visit parameters page to find out more about parameters setup in general and logging parameters in particular.

Once you re-start Nimble, you'll be able to view the log. In Ubuntu it's located in /var/log/nimble/access.log by default.

Server log

Those logs show information about server behavior in general.

By default, Nimble Streamer server logs are available in /var/log/nimble/nimble.log for Linux and in application log folder for Windows. However you can control that in a config file. Read this reference page to see how you can define destination for your logs.

You may also choose logging level for server information via web UI. The more detailed logging is selected, the more information you'll get as output.

All settings are applied without server restart which allows easily manage its behavior depending on your needs.

Go to Servers menu and then click on the name of the server which you need to make changes for.

In server details page, click on Edit icon - the first one in the list - to see the following page.

Here you can see Log mode drop-down selector. It has the following values:

  • error - this is the default mode, it writes down only errors
  • info - gives information from "error" mode plus general information about server work
  • verbose - adds more details on top of "info" mode output
  • debug - most detailed output.

We recommend enabling debug log mode in case you want to contact our support team.
As was mentioned earlier, all settings are applied dynamically without server restart.

August 10, 2016

PCM G.711 audio support in Nimble Streamer

Recently we were extending codecs coverage for Nimble Streamer.

Today we introduce support for PCM, or G711, (both a-law and μ-law) audio codec.

It can be used as input for Nimble Streamer Live Transcoder for further transformation into AAC.

It also can be used for RTSP transmuxing - it will be passed through from input to output.

Related documentation

Nimble Streamer Live TranscoderRTSP transmuxingCodecs support in Nimble Streamer transmuxer.