Anyone care to take a shot at why this video won't play....

Discussion in 'Apple TV and Home Theater' started by shorn, Jan 14, 2011.

  1. macrumors regular

    Joined:
    Jun 29, 2010
    #1
    Hi all,

    I've converted (using MKVTools) alot of MKV's successfully. However I hit some that wont play on the appletv (gen2).

    Heres the log of the file that wont play...

    PHP:
    General Container Stream #1
        
    Total Video Streams for this File.................1
        Total Audio Streams 
    for this File.................1
        Video Codecs Used
    .................................AVC
        Audio Codecs Used
    .................................AAC LC
        File Format
    .......................................MPEG-4
        Play Time
    .........................................51mn 52s
        Total File Size
    ...................................677 MiB
        Total Stream BitRate
    ..............................1 825 Kbps
        Title 
    (Tag).......................................New Germany (1933 1939)
        
    Encoded with......................................iFlicks
    Video Stream 
    #1
        
    Codec (Human Name)................................AVC
        Codec 
    (FourCC)....................................avc1
        Codec Profile
    .....................................High@L3.1
        Frame Width
    .......................................720 pixels
        Frame Height
    ......................................572 pixels
        Frame Rate
    ........................................25.000 fps
        Total Frames
    ......................................77808
        Display Aspect Ratio
    ..............................1.373
        Scan Type
    .........................................Progressive
        Color Space
    .......................................YUV
        Codec Settings 
    (Summary)..........................CABAC 16 Ref Frames
        QF 
    (like Gordian Knot)............................0.161
        Codec Settings 
    (CABAC)............................Yes
        Codec Settings 
    (Reference Frames).................16
        Video Stream Length
    ...............................51mn 52s 320ms
        Video Stream BitRate
    ..............................1 659 Kbps
        Video Stream BitRate Mode
    .........................VBR
        Bit Depth
    .........................................8 bits
        Video Stream Size
    .................................615 MiB (91%)
        
    Video Stream Title................................/Volumes/BACK UP/The World At War/Season 01/The.World.At.War.s01.e01.New Germany 1933-1939.mkv.temp.v1.h264 Imported with GPAC 0.4.6-DEV (internal rev6)
        
    Video Encoder.....................................x264 core 68 r1195M 5d75a9b
        Video Encoder 
    (Settings)..........................cabac=ref=16 deblock=1:-3:-analyse=0x3:0x133 me=umh subme=10 psy_rd=1.9:0.2 mixed_ref=me_range=24 chroma_me=trellis=8x8dct=cqm=deadzone=21,11 chroma_qp_offset=-threads=nr=decimate=mbaff=bframes=b_pyramid=b_adapt=b_bias=direct=wpredb=keyint=250 keyint_min=25 scenecut=40 lookahead=100 rc=2pass mbtree=bitrate=1659 ratetol=1.0 qpmin=10 qpmax=51 qpstep=cplxblur=20.0 qblur=0.5 ip_ratio=1.40 aq=1:0.85
        Date of Original Encoding
    .........................UTC 2011-01-13 07:04:51
    Audio Stream 
    #1
        
    Codec.............................................AAC
        Codec 
    (FourCC)....................................40
        Audio Stream Length
    ...............................51mn 52s 128ms
        Audio Stream BitRate
    ..............................157 Kbps
        Audio Stream BitRate Mode
    .........................VBR
        Number of Audio Channels
    ..........................2
        Audio Channel
    's Positions.........................Front: L R
        Sampling Rate.....................................48.0 KHz
        Audio Stream Size.................................58.4 MiB (9%)
        Audio Stream Title................................/Volumes/BACK UP/The World At War/Season 01/The.World.At.War.s01.e01.A New Germany - 1933-1939.mkv.temp.Audio.t0.aac:lang=English - Imported with GPAC 0.4.6-DEV (internal rev. 6)
        Audio Stream Language.............................English
        Date of Original Encoding.........................UTC 2011-01-13 07:05:16
    and heres one that plays fine...

    PHP:
    General Container Stream #1
        
    Total Video Streams for this File.................1
        Total Audio Streams 
    for this File.................2
        Video Codecs Used
    .................................AVC
        Audio Codecs Used
    .................................AC3 AAC LC
        File Format
    .......................................MPEG-4
        Play Time
    .........................................22mn 59s
        Total File Size
    ...................................971 MiB
        Total Stream BitRate
    ..............................5 905 Kbps
        Title 
    (Tag).......................................Pilot
        Encoded with
    ......................................iFlicks
    Video Stream 
    #1
        
    Codec (Human Name)................................AVC
        Codec 
    (FourCC)....................................avc1
        Codec Profile
    .....................................High@L3.1
        Frame Width
    .......................................1 280 pixels
        Frame Height
    ......................................720 pixels
        Frame Rate
    ........................................23.976 fps
        Total Frames
    ......................................33073
        Display Aspect Ratio
    ..............................16:9
        Scan Type
    .........................................Progressive
        Color Space
    .......................................YUV
        Codec Settings 
    (Summary)..........................CABAC 5 Ref Frames
        QF 
    (like Gordian Knot)............................0.239
        Codec Settings 
    (CABAC)............................Yes
        Codec Settings 
    (Reference Frames).................5
        Video Stream Length
    ...............................22mn 59s 421ms
        Video Stream BitRate
    ..............................5 285 Kbps
        Video Stream BitRate Mode
    .........................VBR
        Bit Depth
    .........................................8 bits
        Video Stream Size
    .................................870 MiB (90%)
        
    Video Stream Title................................/Volumes/BACK UP/Modern Family/Season 01/Modern.Family.S01E01.720p.BluRay.X264-REWARD.mkv.temp.v1.h264 Imported with GPAC 0.4.6-DEV (internal rev6)
        
    Video Encoder.....................................x264 core 104 r1713 c276662
        Video Encoder 
    (Settings)..........................cabac=ref=deblock=1:0:analyse=0x3:0x133 me=umh subme=psy=psy_rd=1.00:0.00 mixed_ref=me_range=16 chroma_me=trellis=8x8dct=cqm=deadzone=21,11 fast_pskip=chroma_qp_offset=-threads=12 sliced_threads=nr=decimate=interlaced=constrained_intra=bframes=b_pyramid=b_adapt=b_bias=direct=weightb=open_gop=weightp=keyint=240 keyint_min=24 scenecut=40 intra_refresh=rc_lookahead=40 rc=2pass mbtree=bitrate=5285 ratetol=1.0 qcomp=0.60 qpmin=10 qpmax=51 qpstep=cplxblur=20.0 qblur=0.5 ip_ratio=1.40 aq=1:1.00
        Date of Original Encoding
    .........................UTC 2011-01-12 22:58:44
    Audio Stream 
    #1
        
    Codec.............................................AC-3
        Codec 
    (FourCC)....................................ac-3
        Audio Stream Length
    ...............................22mn 59s 424ms
        Audio Stream BitRate
    ..............................448 Kbps
        Audio Stream BitRate Mode
    .........................CBR
        Number of Audio Channels
    ..........................6
        Audio Channel
    's Positions.........................Front: L C R, Side: L R, LFE
        Sampling Rate.....................................48.0 KHz
        Bit Depth.........................................16 bits
        Audio Stream Size.................................73.7 MiB (8%)
        Audio Stream Title................................/Volumes/BACK UP/Modern Family/Season 01/Modern.Family.S01E01.720p.BluRay.X264-REWARD.mkv.temp.Audio.t0.ac3:lang=English - Imported with GPAC 0.4.6-DEV (internal rev. 6)
        Audio Stream Language.............................English
        Date of Original Encoding.........................UTC 2011-01-12 22:59:21
    Audio Stream #2
        Codec.............................................AAC
        Codec (FourCC)....................................40
        Audio Stream Length...............................22mn 59s 349ms
        Audio Stream BitRate..............................157 Kbps
        Audio Stream BitRate Mode.........................VBR
        Number of Audio Channels..........................2
        Audio Channel'
    s Positions.........................FrontL R
        Sampling Rate
    .....................................48.0 KHz
        Audio Stream Size
    .................................25.9 MiB (3%)
        
    Audio Stream Title................................/Volumes/BACK UP/Modern Family/Season 01/Modern.Family.S01E01.720p.BluRay.X264-REWARD.mkv.temp.Audio.t0.added.aac:lang=English Imported with GPAC 0.4.6-DEV (internal rev6)
        
    Audio Stream Language.............................English
        Date of Original Encoding
    .........................UTC 2011-01-12 22:59:28
    Theres not much difference between them so i cannot understand what the problem is.
     
  2. roidy, Jan 14, 2011
    Last edited: Jan 14, 2011

    macrumors 6502a

    Joined:
    Dec 30, 2008
    Location:
    Nottingham, UK
    #2
    At a guess I'd say it's because it's been encoded with 16 reference frames:eek: Thats gonna make any device struggle.
     
  3. thread starter macrumors regular

    Joined:
    Jun 29, 2010
    #3
    That was the only thing that i noticed was different. What do the reference frames mean then? This is untouched video, so I'm guessing it'll need encoding? I was hoping avoid that, especially as it was h264 originally. Its a pain, cos it plays flawlessly in iTunes, but i guess ATV is another beast!
     
  4. roidy, Jan 14, 2011
    Last edited: Jan 14, 2011

    macrumors 6502a

    Joined:
    Dec 30, 2008
    Location:
    Nottingham, UK
    #4
    Reference Frames

    To put it into perspective Blu-ray's usually have between 2 and 5 reference frames, 16 is just plain stupid but alas you find this in a lot of torrented material. The people who encode them think there getting better quality by using insainly high ref frame numbers when infact there just making the file harder to play.
     
  5. macrumors 6502a

    Joined:
    Sep 30, 2010
    #5
    As other have said 16 reference frames is the issue. Why do people encode in stupid ways.
     

Share This Page