1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Playing "letterbox" media files.

Discussion in 'HDR-FOX T2 Freeview Recorder' started by peterpi, Feb 1, 2012.

  1. peterpi

    peterpi Member

    I have transfered some media files to my media server which are "letterbox" format, but when I play them they are stretched to fill the screen. Other "letterbox" files are displayed properly.

    I use Freemake Video Converter to change the files to MP4. The first file info below is from a DVD, the second from an MKV file, both were originally in "letterbox" format.

    Is there a setting on the T2 to correct the video, as there is nothing I can select on my TV do do the job.

    I will carry on playing with the settings on Freemake to see if I can re-encode in a format which works.

    If anyone has an idea why this is happening, I would be obliged for your input.

    thanks
    Pete

    Correct View File Info

    Format : MPEG-4
    Format profile : Base Media
    Codec ID : isom
    File size : 1.52 GiB
    Duration : 2h 2mn
    Overall bit rate : 1 784 Kbps
    Writing application : Lavf52.94.0

    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : Main@L3.0
    Format settings, CABAC : Yes
    Format settings, ReFrames : 2 frames
    Codec ID : avc1
    Codec ID/Info : Advanced Video Coding
    Duration : 2h 2mn
    Duration_FirstFrame : -40ms
    Bit rate : 1 685 Kbps
    Width : 720 pixels
    Height : 404 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Variable
    Frame rate : 25.000 fps
    Minimum frame rate : 12.500 fps
    Maximum frame rate : 25.000 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.232
    Stream size : 1.45 GiB (95%)
    Writing library : x264 core 112 r1834 a51816a
    Encoding settings : cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x1:0 / me=dia / subme=2 / psy=1 / psy_rd=0.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=3 / weightb=0 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=1685 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.41 / aq=1:1.00

    Distorted File Info

    Format : MPEG-4
    Format profile : Base Media
    Codec ID : isom
    File size : 26.8 MiB
    Duration : 1mn 55s
    Overall bit rate : 1 951 Kbps
    Writing application : Lavf52.94.0

    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : Main@L3.0
    Format settings, CABAC : Yes
    Format settings, ReFrames : 2 frames
    Codec ID : avc1
    Codec ID/Info : Advanced Video Coding
    Duration : 1mn 55s
    Bit rate : 1 565 Kbps
    Width : 720 pixels
    Height : 308 pixels
    Display aspect ratio : 2.35:1
    Frame rate mode : Constant
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.294
    Stream size : 21.5 MiB (80%)
    Writing library : x264 core 112 r1834 a51816a
    Encoding settings : cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x1:0 / me=dia / subme=2 / psy=1 / psy_rd=0.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=3 / weightb=0 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=1565 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.41 / aq=1:1.00
     
  2. Black Hole

    Black Hole Ron Glum

    If you look at the aspect ratios detected in the above, the "good" one says 16:9 and the "bad" one says 2.35:1. Presuming you are outputting to a 16:9 screen, I would suggest the "good" one is encoded with the letterbox already in the frame, and the "bad" one not.

    Have you tried setting the video output mode to "original"? Another thing to remember is the TV might also be stretching/squashing the input data to fill the screen.
     
  3. Ezra Pound

    Ezra Pound Well-Known Member

    Does the HDR-Fox T2 have an "original" video output mode?
     
  4. Black Hole

    Black Hole Ron Glum

    Possibly not, I was out and about at the time. How about "Auto"?
     
  5. Steve Harper

    Steve Harper New Member

    I have come across this on the HDR playing back dvd rips that I have cropped the black bars off, giving a resolution of 704x432 with an ar of 2.35:1 the HDR stretches and distorts the video to fill the screen. The way I get them to display correctly is to go into
    settings > preferences > video > change screen ratio to 4:3 and display format to letterbox 16:9. Then you have to change it back for normal tv which is a hassle, so I now I don't bother croping off the black bars maintaining the 720x576 16:9 resolution on any new rips.
     
  6. Black Hole

    Black Hole Ron Glum

    That's clever, it comes out to 2.37:1.
     
  7. peterpi

    peterpi Member

    A few suggestions since my last visit, I'll give 'em a whirl.
     
  8. peterpi

    peterpi Member

    Sorry for the delay in replying, work has been getting in my way!

    Tried the above and it worked, belated thanks.
     
  9. Black Hole

    Black Hole Ron Glum

    Recently I have been viewing some 4:3 material from BBC FOUR, and it was being stretched to fill the 16:9 output (the opposite way to you, but similar problem). I found that by changing the Humax's wide button setting to "pillar box" rather than "auto" sorted it (and I don't have to switch back for 16:9 originals). In other words, for "auto" read "stretch".

    It seems the Humax is configured for coping with 4:3/16:9 material presented on a 16:9 screen, or 4:3/16:9 material presented on a 4:3 screen, but doesn't know to expect 2.35:1 material or what to do with it (broadcast sources will always reframe it to 16:9 with black bars). Setting up the Humax for a 4:3 screen (even though it is actually a 16:9 screen) and then setting the wide button to "letterbox 16:9" is a nifty work-around that achieves 2.37:1 (close enough 2.35:1 to make no difference).
     
  10. jdtanner

    jdtanner New Member

    Hi all,

    Sorry to reopen an old topic, but I could do with a small clarification. I have an MP4 file with a resolution of 1920x800. Am I correct that the only way that I can get this to play without being stretched/squished is to follow the procedure in post 5 above?

    Thanks,
    JT
     
  11. Black Hole

    Black Hole Ron Glum

    Yes. Why not just try it?
     
  12. jdtanner

    jdtanner New Member

    I have; I just wanted to know if ant progress had been made on any other workarounds :)
     
  13. Black Hole

    Black Hole Ron Glum

    There don't seem to be any alternative routes to explore.