2 Replies Latest reply: Feb 24, 2013 10:16 AM by neil wilkes RSS

    using MPEG4 (XVID codec)

    kar13 Community Member

      I've been supplied video files, for an upcoming DVD, with the following specs:


      It seems to be appearing "ok" on my test DVD, but I've heard that XVID is heavily compressed and just wonder if there's any input out there on using these files.




      ID :0
      Format :MPEG-4 Visual
      Format profile :Advanced Simple@L5
      Format settings, BVOP :2
      Format settings, QPel :No
      Format settings, GMC :No warppoints
      Format settings, Matrix :Default (H.263)
      Muxing mode :Packed bitstream
      Codec ID :XVID
      Codec ID/Hint :XviD
      Duration :2mn 9s
      Bit rate :9 428 Kbps
      Width :1 280 pixels
      Height :972 pixels
      Display aspect ratio :4:3
      Frame rate :30.000 fps
      Color space :YUV
      Chroma subsampling :4:2:0
      Bit depth :8 bits
      Scan type :Progressive
      Compression mode :Lossy
      Bits/(Pixel*Frame) :0.253
      Stream size :145 MiB (98%)
      Title :Video #1
      Writing library :XviD 1.1.2 (UTC 2006-11-01)




      ID :1
      Format :ADPCM
      Codec ID :2
      Codec ID/Hint :Microsoft
      Duration :2mn 8s
      Bit rate mode :Constant
      Bit rate :176.4 Kbps
      Channel(s) :1 channel
      Sampling rate :44.1 KHz
      Bit depth :4 bits
      Stream size :2.73 MiB (2%)
      Interleave, duration :46 ms (1.39 video frame)
      Title :Audio #1
        • 1. Re: using MPEG4 (XVID codec)
          John T Smith MVP

          You are being given MPEG4 files, which are highly compressed


          The DVD specification is for MPEG2 files (as VOB) which are also highly compressed


          You are re-compressing a compressed file


          If you could be given a better source file, or one that is already in a DVD legal MPEG2 format, you should have a better DVD

          • 2. Re: using MPEG4 (XVID codec)
            neil wilkes MVP

            That audio bit depth looks wrong too - 176.4Kbps is CD-Audio with Subchannels rates, yet we see 1 channel at 4 bits? I would throw this back & ask for LPCM audio at 16/48 minimum.


            Traditionally & historically, XviD is a nightmare & best avoided if at all possible. Why? because it can - and does - play havoc with your installed codecs (likewise DivX).


            It will need to get interlaced as well during transcoding - this will lose quality.  Finally, the size is a funky one too - 1280x720 I have heard of, but 1280x972?


            Maybe I am out of touch.....but this just looks wrong.