Results 1 to 2 of 2

Thread: Recorded stream low FPS: server/wowza issue or client side issue?

  1. #1
    Join Date
    Aug 2014
    Posts
    1

    Default Recorded stream low FPS: server/wowza issue or client side issue?

    Hi there,

    I am using Wowza mainly to record incoming video streams from webcams. However, I have a lot of the video's with a very low FPS rate (lower then 10 FPS, some video's are even as low as 4 FPS).

    In the beginning I thought this was a client side issues. Initially, I thought I tried the recording quality (640x480) was too much for some clients too handle. Especially when the user had a webcam with a lower resolution. Therefore, I lowered the default recording quality to 320x240, plus I lowered the keyframe rate to 1 keyframe every 30 frames (to save bandwidth).

    However, the problem persisted. Then I started considering the issue might be related to a low-end CPU and/or low bandwidth availability. So, I lowered the minimum accepted recording quality (using the AS3 method netStream.setQuality) and maximised the bandwidth that can be used by the client. Both measures, should (theoretically) prevent frames from getting dropped.

    Again the problem the persisted. Recently, we had a user with the same issue, who was using the latest Macbook Air. Which excludes in my opinion the possibility that a low-end CPU might be causing this issue. Also, this user had a very decent bandwidth available (I am checking and storing this as well). So, I am running out of option what might causing these frames to drop.

    I am hosting the Wowza DVR instance on a VPS (2 CPU, 4 GB RAM). I know, this is lower then the minimum Wowza requirements. However, the CPU usage did not ever exceeded 10% in the last 1 month. So, to my knowledge Wowza performs okay on this VPS.

    My question: can anyone exclude that this issue might be related to the server or Wowza intance?

    Thanks in advance!
    Ron

  2. #2
    Join Date
    Jun 2011
    Posts
    1,037

    Default

    Hi,
    When recording to nDVR it requires very high disk I/O performance to ensure that multiple streams can be written and read simultaneously.
    If you are having issues mainly with the recording and not necessarily with the resultant live streams, then this could be the issue.

    Daren

Similar Threads

  1. Publish video stream with fps=30 but play with fps=15
    By terbooter in forum General Forum
    Replies: 2
    Last Post: 04-02-2014, 06:27 AM
  2. How to read metadata of a recorded stream from server side
    By ripleyXLR8 in forum Wowza Streaming Server Java API
    Replies: 8
    Last Post: 03-19-2014, 10:06 AM
  3. Edge origin issue with server side modules
    By sutharshan02 in forum Live Streaming and Encoders
    Replies: 3
    Last Post: 03-19-2014, 06:54 AM
  4. FMLE - Wowza - HTML5 client timecode issue
    By sergeil in forum Live Streaming and Encoder Discussion
    Replies: 2
    Last Post: 04-16-2013, 05:02 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •