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TMPGenc: Decoder lag

Discussion in 'DivX / XviD' started by kakashi??, Mar 4, 2005.

  1. kakashi??

    kakashi?? Guest

    What is happening some files I am trying to convert shows a decoder lag. How can I overcome this.
     
  2. aldaco12

    aldaco12 Active member

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    What is a 'decoder lag'? The audio which has a delay from the video at a certain point?
     
  3. kakashi??

    kakashi?? Guest

    I am not sure either.It simply has a black screen at the start of the video stating Warning:Nothing to output bframe decoder lag.
     
  4. Mick69

    Mick69 Guest

  5. Akis401

    Akis401 Member

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    Virtualdubmod----->open file (avi for example)
    stream list------->save stream as .wav
    stream list-------> disable stream
    ---------------> start frame server (start--->save, give a name)
    TMPGenc----->browse video file(go where u saved the file and load the file.......vdr,(show all files)then browse audio and
    load the .wav u saved be4.----> Load ---->click on dvd pal and start. Video and audio are ok after 4-5 hours.
     
  6. celtic_d

    celtic_d Regular member

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    Sounds like you are talking about an XviD file that has bframes that aren't packed. The message is there because the video is being opened via VfW which can't properly handle bframes due to its one frame in one frame out design.

    You could increase the directshow priority in TMPGEnc so that the file is opened via dshow and not VfW.
     
  7. shiroh

    shiroh Guest

    @Akis401
    if you're gonna frameserve, make sure you use direct stream copy, unless you want to use filters.
    why? cause full processing converts to rgb, which will slow you down, and may reduce quality.
    or better yet learn avisynth
     
  8. celtic_d

    celtic_d Regular member

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    TMPGEnc converts to RGB24 anyway.
     
  9. shiroh

    shiroh Guest

    didn't realise that.

    what about those libavcodec encoder?
    quenc, hcenc, etc.
     
    Last edited by a moderator: Apr 6, 2005
  10. celtic_d

    celtic_d Regular member

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    HC isn't libavcodec based. It was written from scratch in fortran.
    That said it like all libavcodec based apps uses YV12. Newer CCE versions also accept YV12 however I still think they process internally YUY2. Not sure if any commercial encoders process in YV12, well other than maybe VSO's divxtodvd, that is if it actually uses libavcodec for output and not just input.
     
  11. Cabs

    Cabs Member

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    If you get the message "Warning: Nothing to output bframe decoder lag". Is as mentioned above is because of the VFAPI plugins in the Options > Enviromental settings > VFAPI.

    Just right click on
    "DirectShow Multimedia File Reader" and select "Higher priority" twice (until it's on top of the list).
     

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