HUGE sound blips when encoding Video

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This topic contains 6 replies, has 1 voice, and was last updated by Profile photo of Kyle Kyle 10 years, 8 months ago.

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  • #77203
    Profile photo of Kyle
    Kyle
    Participant

    When I export a video file from Sorenson Squeeze, sometimes in the video I get loud scratchy blip noises in the audio. The blips arent in the original file. Does anybody know why this is happening? I am encoding it as a .mov with MPEG 4 Audio at 48000khz, and 320bit rate. Here is an example of what im talking about:

    NOTE: This encoding was encoded at 1.6Mbps Video Rate (Sorenson 3 Pro), and 48000Khz 320kbps 16 Channel Stereo (Mpeg 4 Audio)

    http://www.geocities.com/prohaskastudios/BlipClip.mov

    .mov (1.7mb)

    #77216
    Profile photo of unfoldingmetal
    unfoldingmetal
    Participant

    Yeah that happened to me before when I used mpeg. That is why I stopped using it. It happens to me in some but few audio files, however I have no idea what it is.

    If it is possible, you might want to turn down the rendering speed, so it won’t make mistakes. I don’t know if that is possible though. Otherwise, maybe switching codecs would solve the problem.

    #77386
    Profile photo of Kyle
    Kyle
    Participant

    Nope didnt help, it only seems to happen when I use a Xvid encoded file.:(Xvid is what all of the files I need to encode is encoded in. Any more suggestions?

    #77390
    Profile photo of Watson
    Watson
    Participant

    It could have something to do with audio interleave. This has to do with how long individual audio segments are, by my understanding. You can have the audio segments range from one each frame to one for the entire movie. Certain processors cannot support such high rates as one each frame, or even one each second, and so pops occur.

    Some programs will allow you to change the audio interleave before you render your movie, and I’ve found in my case that simply having one large audio chunk that runs throughout the whole movie removes the most popping. Despite this, I too have found that I can’t remove absolutely every pop in the audio.

    #77393
    Profile photo of Kyle
    Kyle
    Participant

    I finally figured it out. All of the movie files that I put into the encoded had one thing in common, Xvid. I figured that was the problem untill I realized that it was audio I was working with. So I looked again and found out that they all had another thing in common. They were all ripped using the AC3 Dolby Surround Codec. I ripped a small scene again with a MP3 VBR 320kb/bitrate, and encoded in my compression program again, tada! It works fine, no pops, clicks, or blips. 😀 I still dont know why that specific codec causes problems but at least I know why it was happening.

    #77396
    Profile photo of LowweeK
    LowweeK
    Participant

    Are the blips everytime at the same time ?

    If it’s random, then it’s quite hopeless, you need to use another codec.

    #77459
    Profile photo of Kyle
    Kyle
    Participant

    No they are at the same time.

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