Max Bitrate For Mpeg-1

[ConanEdogawa]

i heard that mpeg 1 has a optimum bit rate for the best quality i dont know what it is ive been around 9000kbps is this too high not used to the mpeg 1 format so im at a loss here also is encoding from mpeg1 to mp4 any good should i be doing another format

[Selur]

i heard that mpeg 1 has a optimum bit rate for the best quality

For what content?

MPEG-1 supports resolutions up to 4095×4095 (12-bits), and bitrates up to 100 Mbit/s.

source: http://en.wikipedia.org/wiki/MPEG-1

also is encoding from mpeg1 to mp4 any good should i be doing another format

you will lose quality unless you do a lossless compression which will increase the file size

[ConanEdogawa]

im ripping some old dvds a vhs tapes to my comp i use 720x480 9500kbps and u said lossless ok i can work with that thanks

[Selur]

im ripping some old dvds a vhs tapes to my comp i use 720x480 9500kbps

Why not simply keep the original MPEG-2 video stream?

[lordsmurf]

You mean MPEG-2, not MPEG-1

And that's ONLY for DVD-Video specs, not MPEG-2 itself.

Blu-ray is better, at 15Mb/s bitrate (15,000kbps)
Broadcast is 25-50MB/s

Never re-encode DVD unless restoring it. Otherwise quality gets worse, not better.

[Cornucopia]

Totally depends on the encoder and the "profile" (though, strictly speaking, MPEG1 doesn't really have profiles). For example, if you choose CPB/CIF/SIF/VCD type profiles, it's going to give you a ceiling of ~1.5Mbps.

I know for a fact (because I have tested it before), that some encoders can do up to 15Mbps of 1/4D1 rez material. In fact, an old hardware-based capture & encoding card I used in a previous production company (over a decade ago) would cap the incoming tape signals as MPEG1 I-frame-Only at 15Mbps.

All psychovisual/lossy codecs have a "sweet spot" of quality compared to resolution & bitrate. They all vary, and they all have a RANGE to that sweet spot. 9000 could be too high for certain material and too low for other material, just depends.

Do you already have something in MPEG1 and want to re-encode/convert it? Or what?

Scott

<edit> Aah! While I was composing the text, clarifying info arrived. OK, so MPEG2 instead of MPEG1. You have a DVD rip. It works, right? So leave it as is. If it isn't broke stop trying to fix it.

[ConanEdogawa]

yea the dvds are mpeg 2 but i capture the vhs tapes in mpeg 1 because the capture card i am using for some reason wants to drop frames when i use mpeg 2 so i pretty much have to use mpeg 1 for the vhs tapes thats why i was asking what was the best or max bitrate i want to take the mpeg 1 and convert it to something so i can stream from my pc hence why i asked what was the best format to convert 2 i guess i just have to try it at different rates and compare

Update by the way i am using a old Avermedia Ultra TV 1500 to capture the vhs tapes

[lordsmurf]

Get a better capture card.
Don't ruin video because of a crappy uncooperative video card/

[ConanEdogawa]

Get a better capture card.
Don't ruin video because of a crappy uncooperative video card/

Anything you can recommend i dont mind a external capture device im just used to having a internal one maybe something maybe in the 100 buck range? or should i just wait it out and get a hd pvr