MPEG compatibility

 

In this test I wanted to try how the Denver DVD-176 reacts to plain MPEG1 and MPEG2 files on a regular data CD.  I have made a standard CD with MPEG1 (VCD resolution, 352x288) and MPEG2 (SVCD resolution, 480x576) files.

I encoded all files that I tried with TMPGenc v2.57.41.146. They were all in PAL-format. The VCD and SVCD files were CBR (Constant Bit Rate) and the CVD were VBR (Variable Bit Rate).

Here is a table that explains the structure of the CD with MPEG-files that I made. It also has information about which MPEG's that played as they should.

Directory/File

Information

Outcome

\ Root directory  
  VCD.mpg VCD (352x288), MPEG1, 1150 kbit/s Played OK!
  XVCD_2M.mpg XVCD (352x288), MPEG1, 2 Mbit/s Picture stutters occationally, sound is OK
  XVCD_3M.mpg XVCD (352x288), MPEG1, 3 Mbit/s Picture stutters badly, sound is OK
  XVCD_4M.mpg XVCD (352x288), MPEG1, 4 Mbit/s Picture stops, sound is OK
  SVCD.mpg SVCD (480x576), MPEG2, 2520 kbit/s CBR Picture stutters occationally, sound is OK
  XSVCD_4M.mpg XSVCD (480x576), MPEG2, 4 Mbit/s CBR Picture stutters occationally, sound is OK
  XSVCD_6M.mpg XSVCD (480x576), MPEG2, 6 Mbit/s CBR Picture and sound stutters badly
  XSVCD_8M.mpg XSVCD (480x576), MPEG2, 8 Mbit/s CBR Picture and sound stutters badly
  CVD_44K.mpg CVD (352x576), MPEG2,
1100/1900/2520 kbit/s VBR,
44.1kHz audio
Picture stutters occationally, sound is OK
  CVD_48K.mpg CVD (352x576), MPEG2,
1100/1900/2520 kbit/s VBR,
48kHz audio
Picture stutters occationally, sound is OK
\VCD Subdir with MPEG1-files copied from an actual VCD  
  VCD.dat   Played OK!
  XVCD_2M.dat   Picture stutters occationally, sound is OK
  XVCD_3M.dat   Picture stutters badly, sound is OK
  XVCD_4M.dat   Picture stops, sound is OK
\SVCD Subdir with MPEG1-files copied from an actual SVCD  
  SVCD.mpg   Played OK!
  XSVCD_4M.mpg   Picture stutters occationally, sound is OK
  XSVCD_6M.mpg   Picture and sound stutters
  XSVCD_8M.mpg   Picture and sound stutters badly
\CVD Subdir with MPEG1-files copied from an actual CvD  
  CVD_44K.mpg   Picture stutters occationally, sound is OK
  CVD_48K.mpg   Picture stutters occationally, sound is OK

The subdirectories in the table may need some explanation. What I did was to burn actual VCD/SVCD/CVD's and then copied the files in the MPEGAV/MPEG2 directories of those CD's. These files are not exactly the same as the original MPEG1/MPEG2 files, and that is why they are in the subdirectories above. I thought that it would be interresting to see if the player could play hte actual files from a VCD/SVCD/CVD disc.

Here is a picture of what's shown on the screen when playing MPEG CD's:

A menu is displayed, and it is possible to navigate in the directory structure and choose which clip to play.

 

These are all the resolutions I have tried. Of course I could try out other resolutions, CBR/VBR and bit rates, but it takes to much time and does not give that much extra information.

So as an MPEG player, the DVD-176 seems to have problems with many resolutions and bitrates above standard VCD.

 

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