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Thread: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Errors

  1. #11
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    Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    I just wanted to point out an observation I made while I had this problem. I would get the waited for video buffers and RingBuf Waited 0.2 seconds for data occasionally while watching either live tv or a recording. I tried a few different things involving the differing playback profiles (CPU++, VDPAU and the likes) to no avail.

    I tried using my PS3 to see if I got the same stuttering every second and I found that the playback was perfectly smooth so the problem lied with the frontend. Knowing this I tried using a Mythbuntu 11.04 live cd and had the exact same problem. When rebooting I went back to 2.6.35.22 instead of the 2.6.35.30 I was using before. Started mythfrontend and ran perfectly.

    I am not sure what was changed between the kernels that could have caused this but I wanted to let someone who may have an idea give anyone still interested a helping hand. Good luck!
    System Specs: AMD Thuban 1055T, Gigabyte 890GPA-UD3H, 4GB DDR3 800, Intel X25-V 40GB ssd, Palit 8800GT 1GB
    Mythtv Backend: AMD 9850+, Gigabyte G-MA785GM-US2H, 8GB DDR2 800, Samsung 1.5 TB & 1.0 TB, Hauppauge 1600, Silicon Dust HD Homerun x 2

  2. #12
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    Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    Quote Originally Posted by Dr Bones View Post
    I just wanted to point out an observation I made while I had this problem. I would get the waited for video buffers and RingBuf Waited 0.2 seconds for data occasionally while watching either live tv or a recording. I tried a few different things involving the differing playback profiles (CPU++, VDPAU and the likes) to no avail.

    I tried using my PS3 to see if I got the same stuttering every second and I found that the playback was perfectly smooth so the problem lied with the frontend. Knowing this I tried using a Mythbuntu 11.04 live cd and had the exact same problem. When rebooting I went back to 2.6.35.22 instead of the 2.6.35.30 I was using before. Started mythfrontend and ran perfectly.

    I am not sure what was changed between the kernels that could have caused this but I wanted to let someone who may have an idea give anyone still interested a helping hand. Good luck!
    Thanks for your post, I am having this problem lots of time. I am on Debian Squeeze (2.6.32-5-686) with debian-mutimedia repository on a Nvidia ION board.

    This is what I get on the frontend log:

    Code:
    2011-09-12 16:36:28.333 [mp2 @ 0xb4c7df60]Header missing
    2011-09-12 16:36:28.333 AFD Error: Unknown audio decoding error
    2011-09-12 16:36:28.361 AO: OutputAudioLoop: Play Event
    2011-09-12 16:36:28.572 AO: Pause 1
    2011-09-12 16:36:28.575 [mp2 @ 0xb4c7df60]Header missing
    2011-09-12 16:36:28.575 AFD Error: Unknown audio decoding error
    2011-09-12 16:36:28.580 AO: OutputAudioLoop: audio paused
    2011-09-12 16:36:28.682 Player(0): Waited 100ms for video buffers
    (AF)(ad)(AD)(ad)AAAAAAAAAALAAAAAAAAAAAAAAAAA(AF)(ad)(AD)(ad)
    2011-09-12 16:36:28.698 Player(0): Waited 100ms for video buffers
    (AF)(ad)(AD)(ad)AAAAAAAAAALAAAAAAAAAAAAAAAAA(AF)(ad)(AD)(ad)
    2011-09-12 16:36:28.804 Player(0): Waited 100ms for video buffers
    (AF)(ad)(AD)(ad)AAAAAAAAAALAAAAAAAAAAAAAAAAA(AF)(ad)(AD)(ad)
    2011-09-12 16:36:28.810 Player(0): Waited 100ms for video buffers
    (AF)(ad)(AD)(ad)AAAAAAAAAALAAAAAAAAAAAAAAAAA(AF)(ad)(AD)(ad)
    2011-09-12 16:36:28.825 [mp2 @ 0xb4c7df60]Header missing
    2011-09-12 16:36:28.826 AFD Error: Unknown audio decoding error
    2011-09-12 16:36:28.826 [mp2 @ 0xb4c7df60]Header missing
    2011-09-12 16:36:28.826 AFD Error: Unknown audio decoding error
    2011-09-12 16:36:28.826 Player(0): Waited 100ms for video buffers
    (UF)(AD)(AD)(AD)AAAAAAALAAuAAAAAAAAAAAAAAAAA(UF)(AD)(AD)(AD)
    2011-09-12 16:36:28.827 AO: Pause 0
    2011-09-12 16:36:28.831 AO: OutputAudioLoop: Play Event
    2011-09-12 16:36:28.947 AO: Pause 1
    2011-09-12 16:36:28.956 AO: OutputAudioLoop: audio paused
    2011-09-12 16:36:28.979 AO: Pause 0
    2011-09-12 16:36:29.001 AO: OutputAudioLoop: Play Event
    I will appreciate any help, I don't know what else to try.

    Thanks and best regards.

  3. #13
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    Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    These issues are often network related as well, so make sure to look at that.

  4. #14
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    Exclamation Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    I started having this issue with a video file and have been trying to figure out exactly what is going on but I think I may have narrowed this down to the version of the codec used. I opened up multiple videos in VLC and all of them are MPEG-4 Video but the one that I am having problems with is DX50 while all of the other ones that work are (XVID). I also loaded up iptraf while starting a video on my front end and I'm seeing that the network load is drastically different. When I open the video using DX50 my throughput runs around 88000 kbits/sec and stays constant around that mark... when I start playing a video other than that one I'm looking at around 15000 kbits/sec and it does not stay up that high constantly but only in short bursts. I then played the same DX50 file from my backend server to my laptop using VLC and it played fine with only around 200kbits/sec peak which, interestingly enough, is about the same as any of my XviD videos. It would seem like mythtv has an issue with streaming DX50 from storage groups requiring an insanely high bandwidth requirement. I still haven't found a solution, unfortunately.

  5. #15
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    Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    Quote Originally Posted by bblboy54 View Post
    I started having this issue with a video file and have been trying to figure out exactly what is going on but I think I may have narrowed this down to the version of the codec used. I opened up multiple videos in VLC and all of them are MPEG-4 Video but the one that I am having problems with is DX50 while all of the other ones that work are (XVID). I also loaded up iptraf while starting a video on my front end and I'm seeing that the network load is drastically different. When I open the video using DX50 my throughput runs around 88000 kbits/sec and stays constant around that mark... when I start playing a video other than that one I'm looking at around 15000 kbits/sec and it does not stay up that high constantly but only in short bursts. I then played the same DX50 file from my backend server to my laptop using VLC and it played fine with only around 200kbits/sec peak which, interestingly enough, is about the same as any of my XviD videos. It would seem like mythtv has an issue with streaming DX50 from storage groups requiring an insanely high bandwidth requirement. I still haven't found a solution, unfortunately.
    What you haven't told us is the bitrate of the various files. mediainfo is the best tool for checking. Your logs are also worth looking at.

  6. #16
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    Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    Quote Originally Posted by bblboy54 View Post
    I started having this issue with a video file and have been trying to figure out exactly what is going on but I think I may have narrowed this down to the version of the codec used. I opened up multiple videos in VLC and all of them are MPEG-4 Video but the one that I am having problems with is DX50 while all of the other ones that work are (XVID). I also loaded up iptraf while starting a video on my front end and I'm seeing that the network load is drastically different. When I open the video using DX50 my throughput runs around 88000 kbits/sec and stays constant around that mark... when I start playing a video other than that one I'm looking at around 15000 kbits/sec and it does not stay up that high constantly but only in short bursts. I then played the same DX50 file from my backend server to my laptop using VLC and it played fine with only around 200kbits/sec peak which, interestingly enough, is about the same as any of my XviD videos. It would seem like mythtv has an issue with streaming DX50 from storage groups requiring an insanely high bandwidth requirement. I still haven't found a solution, unfortunately.

    I have found a similar problem with some AVI-files using the DX50 codec. The problem is only evident when trying to stream the file from a media server.

    It seems to be associated with the audio stream.

    I fixed the stutter by using VirtualDub (1.9.11) with the video set to Direct Stream Copy and the audio set to Full Stream Processing: MPEG Layer 3: 160 kBit/s, 48,000 Hz, Stereo.

    The meta data in the original file (using GSpot)was:
    [JUNK] VirtualDub build 32842/release
    [ISFT] VirtualDubMod 1.5.10.2 (build 2540/release)
    [USER] DivX503b1393p
    [USER] XviD0050

    And the original audio format was: 48000Hz 160 kb/s tot , Joint Stereo (i.e the same as the converted-fixed file). The converted file is practically the same size as the original as would be expected.

    I assume there must have been a problem with how the original file was constructed by the earlier version of VirtualDub.

  7. #17
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    Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    Edit: Corrected metadata from original file

    I have found a similar problem with some AVI-files using the DX50 codec. The problem is only evident when trying to stream the file from a media server. As you observed, the expected data rates were well within the capabilities of the network that I was using.

    The problem I had seemed to be associated with the audio stream.

    I fixed the stutter by using VirtualDub (1.9.11, Build 32842) with the video set to Direct Stream Copy and the audio set to Full Stream Processing: MPEG Layer 3: 160 kBit/s, 48,000 Hz, Stereo.

    The meta data in the original file (using GSpot) was an earlier version:
    [ISFT] VirtualDubMod 1.5.10.2 (build 2540/release)
    [JUNK] VirtualDubMod build 2540/release
    [USER] DivX503b1393p
    [USER] XviD0050


    And the original audio format was: 48000Hz 160 kb/s tot , Joint Stereo (i.e the same as the converted-fixed file). The converted file is practically the same size as the original as would be expected.

    I assume there must have been a problem with how the original file was constructed by the earlier version of VirtualDub.

  8. #18
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    Re: Is anyone else getting stuttering output with "Waited 100ms for video buffers" Er

    Please check the date of the thread you reply to and if it's old, open a new thread. Closing zombie thread.
    *Don't PM me directly for support, open a new thread
    *Looking for a MythTV quick start guide?

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