wiki:Testing-Smooth-Streaming
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Testing Smooth Streaming

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  1. Testing Smooth Streaming
      1. Directory layout
      2. Manifest file
      3. A video fragment (without rewrite rules)
      4. A video fragment (with rewrite rules)
      5. Silverlight security settings
    2. Common errors
      1. System.Exception 4001 An error has occured.
    3. Feedback

The players aren't always too kind on their error messages. The best way to make sure that it is setup correctly is to use a commandline tool like 'wget' or 'curl'.

For these examples we assume that you have encoded a video to multiple bit rates and the files are stored in the $(DOCUMENT_ROOT)/video.ssm directory.

Directory layout

Do you have all the necessary files in your $(DOCUMENT_ROOT)/video.ssm/ directory?

It should be similar to this: 

video_400.ismv
video_748.ismv
video_1394.ismv
video_2600.ismv
video.ism
video.ismc

Manifest file

wget -S -O manifest http://localhost/video.ssm/manifest

This should simply return the video.ismc file as stored in your $(DOCUMENT_ROOT)/video.ssm directory.

Possible things to check:

  • Check the rewrite rule that remaps the manifest file.

A video fragment (without rewrite rules)

wget -S -O video.mp4 "http://localhost/video.ssm/video.ism?bitrate=400000&video=0"

Make sure that you substitute the 40000 bit rate with one that you are using.

Do you see the 'X-Mod-Smooth-Streaming: version=1.0.8' in the response header?

Possible things to check:

  • Have you loaded the mod_smooth_streaming module?
  • Have you mapped the .ism extension to use the mod_smooth_streaming module?

A video fragment (with rewrite rules)

wget -S -O video.mp4 "http://localhost/video.ssm/QualityLevels(400000)/Fragments(video=0)"

Possible things to check:

  • Check your rewrite log and check if the above request is rewritten to the URL by the previous example.

Silverlight security settings

Make sure you have a  clientaccesspolicy.xml in your $(DOCUMENT_ROOT). 

<?xml version="1.0" encoding="utf-8" ?>
<access-policy>
<cross-domain-access>
<policy>
<allow-from http-request-headers="*">
<domain uri="*" />
</allow-from>
<grant-to>
<resource path="/" include-subpaths="true" />
</grant-to>
</policy>
</cross-domain-access>
</access-policy>

Common errors

System.Exception 4001 An error has occured.

The PDK/EE3 Silverlight players only work with client manifests containing exactly *one* audio track.

Feedback

If you have any questions, thoughts or ideas on Smooth Streaming you can leave a message on our forum.