Results 1 to 2 of 2

Thread: Low transcoder quality

  1. #1
    Join Date
    Jul 2011
    Posts
    104

    Default Low transcoder quality

    Hey guys!!

    Been a while since I posted, so hope all is well with the Wowza team.

    I posted on this thread (http://www.wowza.com/forums/showthre...g-Periodically), but didn't get any nibbles, so figured I'd try a new thread in hopes of getting some insight.

    Seeing some weird stuff with using the transcoder regarding quality at lower bitrates, similar to what the OP was experiencing, except we don't have any CPU spikes or lines in the logs that suggest an issue with either the source stream, hardware, or transcoder itself.

    Some background info:

    We're sending a very small stream (640 x 360) at 3 different bitrates: 1200, 500, 200. Once the audio is added they become 1392, 692, and 392. The profiles for the 692 and 392 bitrates are passthrough for framesize, keyframe interval, audio codec, etc. We're only adjusting the bitrate itself down from the input source at 1392 (1200 + 192).

    At some points, usually when there is a lot of movement on the source stream, the quality of the lower bitrates gets really, really poor. Very blocky, but no stuttering or jerky movements. Only very pixelation and visual distortion, the audio however, is fine, no issues.

    Video is h264 w/ AAC audio, 640 x 360 - Main profile 4.1. Serving to desktop clients, not mobile devices.

    Any insight? Lemme know if you would like / need more info, I'd be happy to provide it!

  2. #2

    Default

    Hi Benny, I posted a reply to your question over here

    Thanks,

    Salvadore

Similar Threads

  1. Transcoder Issues - Jerky video/Low Frame Rates
    By alexmay in forum Wowza Transcoder
    Replies: 4
    Last Post: 05-30-2014, 05:31 PM
  2. Is Transcoder only option for different quality streams?
    By colo_trans in forum General Forum
    Replies: 2
    Last Post: 11-06-2013, 12:21 PM
  3. Transcoder errors when running 3.6.2 on low memory setting
    By pburke in forum AddOn: Transcoder
    Replies: 5
    Last Post: 09-09-2013, 09:34 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
  •