Handbrake .m4v question

Discussion in 'Apple TV and Home Theater' started by thekb, Jun 13, 2011.

  1. thekb macrumors 6502a

    Joined:
    May 8, 2010
    #1
    OK, so I am happily ripping my DVD collection ...

    What would cause a .m4v file to not play with "preview" where you just hit the space bar?

    I ripped 2 DVD's, same EXACT settings, both .m4v files saved in the same directory, one plays when I hit space bar, one just shows a still image preview.

    Any suggestions on what could be different between the two?
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    Use VideoSpec (I prefer that, though it hasn't been updated since 11/2009), MediaInfo Mac (10/2010) or MediaInfo (4/2011, there is a Mac OS X version to download, VideoSpec and MediaInfo Mac are using the same library as MediaInfo) to analyse both videos and attach both reports to your next post.
     
  3. thekb thread starter macrumors 6502a

    Joined:
    May 8, 2010
    #3
    OK, first one is the one that will preview, the second one will not:
    ______________________________

    ***** Analyzed File Results *****

    *** General Parameters ***
    - Name: 01-15 Haven.m4v
    - Container: M4V - QuickTime
    - Size: 466.62 MB
    - Duration: 43mn 48s
    - Bitrate: 1 422 Kbps

    *** Video Track Parameters ***
    - Format: H.264/MPEG-4 AVC
    - Bitrate: Max.: Undefined / Average: 1 061 Kbps / Min.: Undefined
    - Frame rate (fps): Max.: 29.970 / Average: 29.970 / Min.: 11.655
    - Encoding profile: High@L3.0
    - Width (Pixel number): 640*480
    - Pixel Aspect Ratio: Undefined
    - Display Aspect Ratio: 4:3
    - Interlacing: Progressive

    *** First Audio Track Parameters ***
    - Format: AAC - MPEG-4 audio
    - Bitrate: 163 Kbps
    - Resolution: Undefined
    - Profile: Low Complexity
    - Channel(s): 2 (stereo)
    - Position: Front: L R

    *** Miscellaneous ***
    - Subtitle(s): #1 : Timed text - English / #2 : Apple text - English /
    - Album: Undefined
    - Performer: Undefined
    - Genre: Undefined
    - Encoded date: UTC 2011-06-13 15:07:21
    - Album artist: Undefined

    _______________________________________

    ***** Analyzed File Results *****

    *** General Parameters ***
    - Name: 01-06 Chuck Versus the Sandworm.m4v
    - Container: M4V - QuickTime
    - Size: 574.62 MB
    - Duration: 41mn 14s
    - Bitrate: 1 857 Kbps

    *** Video Track Parameters ***
    - Format: H.264/MPEG-4 AVC
    - Bitrate: Max.: Undefined / Average: 1 302 Kbps / Min.: Undefined
    - Frame rate (fps): Max.: 29.970 / Average: 23.976 / Min.: 7.951
    - Encoding profile: High@L3.0
    - Width (Pixel number): 720*400
    - Pixel Aspect Ratio: Undefined
    - Display Aspect Ratio: 16:9
    - Interlacing: Progressive

    *** First Audio Track Parameters ***
    - Format: AAC - MPEG-4 audio
    - Bitrate: 165 Kbps
    - Resolution: Undefined
    - Profile: Low Complexity
    - Channel(s): 2 (stereo)
    - Position: Front: L R

    *** Miscellaneous ***
    - Subtitle(s): #1 : Timed text - English / #2 : Apple text - English /
    - Album: Undefined
    - Performer: Undefined
    - Genre: Undefined
    - Encoded date: UTC 2011-06-13 10:55:19
    - Album artist: Undefined
     
  4. simsaladimbamba

    Joined:
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    Location:
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    #4
    The only difference I can see are the resolutions (640 x 480 vs. 720 x 400), the bit rates (1062 vs. 1302 Kb/s), frame aspect ratio (4:3 vs. 16:9) and different frame rates (29.970 vs. 23.976).
    Does QT Player (7 or X) play them back both?
     
  5. thekb thread starter macrumors 6502a

    Joined:
    May 8, 2010
    #5
    Quick time will not play the non-previewable one either, but VLC and itunes do.

    I would love to understand what could be the difference so I can prevent the error in the future. But seriously, I was going through and adding episodes to a queue and did not change any settings at all. ????
     
  6. thekb thread starter macrumors 6502a

    Joined:
    May 8, 2010
    #6
    Some more info that could be relevant.

    All were encoded using Apple TV 2 preset with DeInterlace Slow turned on and subtitles included.

    Could the problem have to do with the DeInterlacing?
     
  7. thekb thread starter macrumors 6502a

    Joined:
    May 8, 2010
    #7
    Anyone have a guess on why the files behave differently?
     
  8. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #8
    The sources seem to be different. Chuck is shot in 16:9, but you once have a 4:3 source that works and seems to be an NTSC source (USA or Japan), and you have a 16:9 source, which has an odd frame rate closer to 24p footage.
    Where does the not working source come from and why is the 4:3 footage 4:3?
     
  9. thekb thread starter macrumors 6502a

    Joined:
    May 8, 2010
    #9
    The "working" one is Dark Angel Season 1 and the "non-working" one is Chuck Season 1. Both USA region. Dark Angel is 4:3 and Chuck is 16:9.

    Near as I can tell, there is no other diffence btween the two.
     

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