Encoding 1080p with HB - Stuttering audio issue

Discussion in 'Apple TV and Home Theater' started by theSeb, Aug 13, 2011.

  1. macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #1
    I hope that someone can help me with this. I am busy converting my DVDs and BRs into mkvs. These will be used to watch on the TV and then I am also planning to encode the mkvs into universal H.264 files so that they can be used with an ATV in the bedroom, an iPad and so forth.

    I've started to encode these mkv files and the SD ones work fine, but I am having an issue with the first 1080p clip that I am trying to encode. The audio stutters in "busy" scenes. In other words, when there is a lot of sound, like for example rain, then the audio stutters badly. I've uploaded a short clip to demonstrate the problem.

    I've tried all the different bit rates and audio codecs and stereo vs surround sound options and nothing helps. Some of the different settings make the problem slightly less annoying or more, but it's always there.

    Does anyone have any idea on how to fix this? This is happening with all of the Band of Brothers BR rips.

    http://www.youtube.com/watch?v=Bbvd0JUQoo0

    [​IMG]
     
  2. roidy, Aug 13, 2011
    Last edited: Aug 13, 2011

    macrumors 6502a

    Joined:
    Dec 30, 2008
    Location:
    Nottingham, UK
    #2
    Download and run mediainfo on the problem file and post the full results so we can take a look and see if anything is wrong with the file, an encode log from Handbrake would also be nice.
     
  3. thread starter macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #3
    This is the one where I was mucking about with the audio options in Handbrake and it didn't help.

    Format : MPEG-4
    Format profile : Base Media / Version 2
    Codec ID : mp42
    File size : 1.17 GiB
    Duration : 58mn 11s
    Overall bit rate : 2 871 Kbps
    Part/Position : 1
    Part/Total : 0
    Track name/Position : 9
    Track name/Total : 10
    Performer : Band of Brothers
    Genre : Military & War
    Encoded date : UTC 2011-08-11 20:10:53
    Tagged date : UTC 2011-08-11 22:07:45
    Writing application : HandBrake 0.9.5 2011010300
    Cover : Yes
    tvsh : Band of Brothers
    tvnn : HBO
    tven : S01E09
    tvsn : 1
    tves : 9
    desc : As Easy Company enters Germany itself, they find themselves confronted with the horrors of the holocaust when members of Easy Company stumble across a Nazi concentration camp.
    ldes : As Easy Company enters Germany itself, they find themselves confronted with the horrors of the holocaust when members of Easy Company stumble across a Nazi concentration camp.
    pcst : 0
    hdvd : 0
    stik : 10
    rtng : 0
    akID : 0
    sfID : 0
    atID : 0
    plID : 0
    geID : 0

    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : Baseline@L3.0
    Format settings, CABAC : No
    Format settings, ReFrames : 2 frames
    Codec ID : avc1
    Codec ID/Info : Advanced Video Coding
    Duration : 58mn 11s
    Bit rate mode : Variable
    Bit rate : 1 899 Kbps
    Width : 720 pixels
    Height : 400 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Variable
    Frame rate : 23.976 fps
    Minimum frame rate : 23.810 fps
    Maximum frame rate : 24.390 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.275
    Stream size : 791 MiB (66%)
    Writing library : x264 core 112
    Encoding settings : cabac=0 / ref=2 / deblock=1:0:0 / analyse=0x1:0x111 / me=umh / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=240 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=3 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
    Encoded date : UTC 2011-08-11 20:10:53
    Tagged date : UTC 2011-08-11 21:10:36
    Material_Duration : 3491821
    Material_StreamSize : 829031663
    Material_FrameCount : 83720
    Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
    Transfer characteristics : BT.709-5, BT.1361
    Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

    Audio #1
    ID : 2
    Format : AAC
    Format/Info : Advanced Audio Codec
    Format profile : LC
    Codec ID : 40
    Duration : 58mn 11s
    Bit rate mode : Variable
    Bit rate : 327 Kbps
    Maximum bit rate : 500 Kbps
    Channel(s) : 2 channels
    Channel positions : Front: L R
    Sampling rate : 48.0 KHz
    Compression mode : Lossy
    Stream size : 136 MiB (11%)
    Language : English
    Encoded date : UTC 2011-08-11 20:10:53
    Tagged date : UTC 2011-08-11 21:10:35
    Material_Duration : 3491840
    Material_StreamSize : 142746049

    Audio #2
    ID : 3
    Format : AC-3
    Format/Info : Audio Coding 3
    Mode extension : CM (complete main)
    Codec ID : ac-3
    Duration : 58mn 11s
    Bit rate mode : Constant
    Bit rate : 640 Kbps
    Channel(s) : 6 channels
    Channel positions : Front: L C R, Side: L R, LFE
    Sampling rate : 48.0 KHz
    Bit depth : 16 bits
    Compression mode : Lossy
    Stream size : 266 MiB (22%)
    Language : English
    Encoded date : UTC 2011-08-11 20:10:53
    Tagged date : UTC 2011-08-11 21:10:35
    Material_Duration : 3491808
    Material_StreamSize : 279344640

    Text
    ID : 5
    Format : Apple text
    Codec ID : text
    Duration : 58mn 11s
    Bit rate mode : Constant
    Bit rate : 0
    Stream size : 192 Bytes (0%)
    Encoded date : UTC 2011-08-11 22:07:45
    Tagged date : UTC 2011-08-11 22:07:45
    Material_Duration : 3491820
    Material_StreamSize : 192

    Menu
    00:00:00.000 : Chapter 00
    00:03:32.629 : Chapter 01
    00:10:09.734 : Chapter 02
    00:20:11.460 : Chapter 03
    00:30:06.346 : Chapter 04
    00:35:51.232 : Chapter 05
    00:45:32.563 : Chapter 06
    00:54:30.558 : Chapter 07

    ----------

    I'll encode another BoB episode and post the HB log and media info with default settings.
     
  4. macrumors 6502a

    Joined:
    Dec 30, 2008
    Location:
    Nottingham, UK
    #4
    Everything looks ok from the mediainfo report, what version of Handbrake are you using? If you're not using the latest nightly then try that.
     
  5. thread starter macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #5
    I am using 0.9.5, which is apparently the latest version.
     
  6. macrumors 6502a

    Joined:
    Dec 30, 2008
    Location:
    Nottingham, UK
    #6
    No, 0.9.5 is the last stable version and is very old now, January 2011 I think. Grab the latest nightly version from:-

    https://build.handbrake.fr/view/Nightlies/

    The nightly versions are much better that 0.9.5 in terms of speed and they fix lots of bugs.
     
  7. theSeb, Aug 13, 2011
    Last edited: Aug 14, 2011

    thread starter macrumors 604

    theSeb

    Joined:
    Aug 10, 2010
    Location:
    Poole, England
    #7
    Thanks. I shall check it out and report back.

    Edit: Thanks Roidy. The latest nightly build fixed the issue
     

Share This Page