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-   -   VCD playtime question (http://forum.bsplayer.com/general-talk-support/8627-vcd-playtime-question.html)

kimiraikkonen 23rd November 2007 08:55 AM

VCD playtime question
 
Hello,
I have a VCD compatible MPEG1 file (352x288@25fps) then i burned this file into a VCD disc with Nero, when i play it as raw, as MPEG file from HDD (before burning) total time is shown about 46:16 in Bsplayer Pro, after making it VCD, my player shows total time 1.00.00.

So, the time instances do not match between MPEG file and VCD format.

What is that reason? The time measurement between VCD and the MPEG doesn't match altought that VCD is made from this MPEG.

Note: That VCD is shown 46.16 total time in BSplayer.

Thanks.

adicoto 24th November 2007 06:39 PM

You made a 29.97 fps NTSC VCD from a PAL 25 fps file. That's where the difference come from.

kimiraikkonen 24th November 2007 08:05 PM

Quote:

Originally Posted by adicoto
You made a 29.97 fps NTSC VCD from a PAL 25 fps file. That's where the difference come from.

Nope, i didn't re-encode or change any setting of MPEG format when burning VCD with Nero.

adicoto 24th November 2007 08:38 PM

Did you selected the output format or did Nero take the default value ?

J7N 25th November 2007 04:15 AM

Wrong playtime estimations are common with MPEG-1/2.

adicoto 25th November 2007 09:34 AM

Standard compatible VCD have a constant bitrate. There it's no need to aproximate, the length of the video it's more than clear. But if you write a 25 fps file in NTSC format (29.97) you won't get more frames, just the player will divide the length of the movie to 29.97 instead of 25 and give a different playing time.

kimiraikkonen 29th November 2007 11:17 AM

Quote:

Originally Posted by adicoto
Standard compatible VCD have a constant bitrate. There it's no need to aproximate, the length of the video it's more than clear. But if you write a 25 fps file in NTSC format (29.97) you won't get more frames, just the player will divide the length of the movie to 29.97 instead of 25 and give a different playing time.

The default VCD encoding standard is selected as "PAL" in Nero. I didn't change it. Don't know which incompatibility has occured. Some of other PAL VCDs total length are displayed different with a few seconds more by my DVD player (stand-alone, connected to TV).

Meanwhile, opening VCD files (DAT + mpeg) requires a huge paging time to operate, the drive lens flashes a lot of times before the track comes out to play though the lens and CD is high quality and clean.


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