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Audio "popping" when prepared with f4fpackager

Mar 26, 2012 5:33 PM

Tags: #hds #f4fpackager

When I prepare a file for HDS using Adobe's f4fpackager tool I experience "popping" in the audio. It seems to be related to the fragment size, smaller size more often, but doesn't nessicary happen once per fragment.


I have tried multiple encoding options to address this. I am using h264/aac with keyframes every 24 frames and a framerate of 24 and doing "--keyframe-intervals-per-fragment 20 --frames-per-keyframe-interval 24 --frame-rate 24" on the packager


I also tried running Adobe's "sample2_1000kbps.f4v" file from the webroot/vod through the packager and playing it back using their integrated player (/webroot/index.html) and experience the same issue. I did this using the packager's default settings.


This is single bitrate streaming.


Is anyone else experiencing this issue or have any ideas of what I could try?




  • Currently Being Moderated
    Apr 24, 2012 1:56 AM   in reply to EdCoyne0



    Are you still experiencing this issue?

    What version of FMS are you using? (Build number?)

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  • Currently Being Moderated
    Apr 24, 2012 11:46 PM   in reply to EdCoyne0

    Hi Ed,


    The audio popping was an issue with FMS, precisely when content was fragmented using JIT which is fixed in FMS 4.5.2. I am not sure you should be seeing this when fragmenting through the f4fpackager.

    Can you please send me the URL that you are using to access the Adobe sample video - sample2_1000kbps.f4v ?


    Also, please update your FMS to the latest 4.5.2 from here:


    And let me know if you are still facing the issue.





    Mark as:

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