mpeg1 to mpeg2 conversion picture quality will improve or the same?

[live4fun]

Hi, everybody,

I have few mpeg1 ( 352x288) clips and I need to convert this to mpeg2 file to
Author dvd.if I re-encode this files in higher bit rate (8000 kbps) the picture quality will improve or it will be the same ?

Thanks

[AlanHK]

No, any conversion will lose quality.

But you can use MPEG1 video on a DVD. You just have to convert the audio from 44 to 48 k sampling rate.

You can use the free version of SVCD2DVDMPG to do this, you'll get your MPEG1 video and an MP2 audio file that you can use in a standard DVD authoring program.

Also, you can use TMPGEnc to cut or join MPEG1.

[guns1inger]

Converting to a higher bitrate will not improve quality unless you are filtering your video as well. Mpeg-1 is arguably a better codec for low bitrate encoding.

[live4fun]

Thanks all of you.

but I have seen in some forum that 352x480 or 352x756 will be more quality
while converting from 352x240 or 352 x 288..can any one clarify?
if so, we have to choose CBR or VBR ?

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[AlanHK]

Thanks all of you.

but I have seen in some forum that 352x480 or 352x756 will be more quality
while converting from 352x240 or 352 x 288..can any one clarify?
if so, we have to choose CBR or VBR ?

Is there some specific problem with the original video? Scratches, dust spots, etc?
Cartoons with lots of jaggies?

If you're trying to fix some flaws in the image, you'll have to filter it and thus reencode. Otherwise use the MPEG1 as-is. If it's a normal VCD-style video, you cannot make it better by upsampling. That kind of magic only works on CSI.

[live4fun]

I don't have any problem with my mpeg1 file. I was thinking of improving
video quality by encoding.

Thanks

[mats.hogberg]

I was thinking of improving video quality by encoding.

Then you got it all wrong. The very best (theoretically) you can hope for, is the same quality as the source after an encoding. In reality, you always lose some quality.

/Mats

[Marvingj]

MPEG-1 defines a framework for compressing video and audio, significantly reducing the amount of storage needed while keeping acceptable quality. The MPEG-1 video compression method takes advantage of the fact that often, many frames in a row are very similar (showing the same background and objects, for instance, with only an actor's face and hands moving). For each frame, it is only necessary to record how it differs from the previous frame, saving storage space. In addition, the audio encoding uses something called psychoacoustics—compression removes the high and low frequencies a normal human ear cannot hear.

MPEG-2 is not a successor to MPEG-1. Both of these formats have their applications. MPEG-1 is used in VCDs and on the web for short video and animation files. One of the MPEG-1 audio compression standards, MPEG 1 Layer III, is the most common compression method for audio files used on portable devices, under the name "MP3." MPEG-2 is used for higher resolution video, digital television and on DVD's.

[AlanHK]

I don't have any problem with my mpeg1 file. I was thinking of improving
video quality by encoding.

No, any conversion will lose quality.

Converting to a higher bitrate will not improve quality.

In reality, you always lose some quality. /Mats

Does that answer your question?

[live4fun]

Thanks to all of you guys.

Now I am clear myself.