encoding

[ribac]

If I understand good,best for encoding a short footage is to use CBR bitrate.
How high I can go??I know that limit is 9.8MBps but in real world I don't want to have a problem to play it on other standalone DVD players.What is highest bitrate you use for DV short (say 30 min)footage??
Also I use Procoder which has another CQ(constant bitrate).
What's the difference between CBR and CQ??

[levick]

I think you will find VBR is better for a quality recording, allowing the encoder to allocate resources where needed.

[ribac]

I tought that VBR is used in case we need to fill more video on DVD,so in segments where there isn't need high bitrate ,encoder use lower one.

[edDV]

To maximize quality from a short DV source, you would use high CBR bitrates, but not so high that lower quality players will choke on the bitrate. A conservative range is 7500-8000 Kb/s.

If you have control of the player, you can experiment with higher bitrates.

[canadateck]

Variable Bit Rate - the bitrate can vary at any part of a single video or audio stream. VBR can is used to increase bitrate during high motion scenes in a video or to reduce overall file size. DVD MPEG-2 video is often variable bit rate.

[ZippyP.]

VBR is best when disk space is limited as it can efficiently allocate bits where they are needed. There are two basic types of VBR encoding, 2-pass (or more) and CQ. 2-pass takes twice as long, as it has analyzing and encoding stages, but the final file size is predictable. CQ is a type of one-pass VBR where the "Q" or quality level is selected and the encoder varies the bitrate to maintain the quality, file size is unpredictable.

At high bitrates VBR becomes redundant and makes almost no detectable difference.

Hope that helps.

[vhelp]

First, I would say.. try not to worry about the dvd players ability
to play your final MPEG's. First run a battery of tests, using
various birtate scenarios. And play in your dvd player(s) and note
the compatibility. Does it play in your player well or not.

If you are only going to be playing in your own dvd player, then I
would say that it would be ok to not worry about high bitrates. I
mean.. you can't possibly measure *every* dvd player's performance
and your MPEG's.. can you. Even if you had 5 players to consider.
You could quite easily test your MPEG's for each. Anyways, I mean well.

In all honesty, quality will depend on the actual MPEG Encoder software
used, and the users knowledge/skills level to operate.

Also, weather VBR or CBR, is a matter of opinion (mine is CBR high bitrate)
but I have found that with DV, you don't have to go so high as 9.8 bits.
You can lower it to 9 bits. I use 9 bits for all my DV cam projects.
I won't use anything lower than 9 bits (that's 9000 bitrate) when using
CBR because I would rather have too much, then too little. And, at 9 bits,
you can fit a good hours worth, with good audio.. though I use 192k for my
audio.

The real truth is in the MPEG Encoder. It would be wise of you to test
your bitrates and vbr vs. cbr before you conclude to a final process.
You may find that various MPEG Encoders will produce different results.
That's why it is wise to test first, every software you have at your
finger tips

-vhelp 3607

[ribac]

I use procoder2 which should do good.

[edDV]

I use procoder2 which should do good.

The main issue when going for high bitrate is determining what DVD player will be used to play back the material. In theory 9800 Kb/s can be used for video+audio+metadata but cheap or older realworld DVD players pixelate or stop unless bitrate is limited.

[ribac]

I used all kinds of bitrates and tried 3 different encoders .It seems that best picture I got is from Procoder2.
I tried to use highest bitrate I could.When I play it on TV I can see some small artifacts around edges(of hills or persons).Is that normal??
I used DV footage from my 3CCD camcorder.I was expected really clear picture.Maybe I have all TV.What's your experience with that??Do you have really clear picture from your DV footage??I mean is not that bad like before when I used 1CCD camera but still I expected little more.

Thank you guys for your help.I'm still learning this stuff but with this forum it's faster than anything else.

[dphirschler]

Just get a bitrate calc. There's a good one here on this site. Give it the time amount of your video clip, the audio bitrate, and you'll get your figures. If your avg and max bitrates are the same, then go CBR, or consider using LPCM audio instead of AC3. Don't worry about the max bitrate. If it is within DVD spec, then your player should play it.


Darryl

[ribac]

Do you guys de-interlace the footage??Probably not right ??for playing on TV I don't have to do that.

So how's your final encoded picture??It is really clean when playing on TV??Or do you see some artifacts?

[edDV]

Keep it interlaced.

Results are very good unless camera shake is extreme. TV connection detemines quality. Y, Pr, Pb (interlace) is best, NTSC/PAL is worst.

[ribac]

I'm sorry ,didn't catch that.Can you explain that about a TV connection??
NTSC/PAL worst?What's that mean.I use PAL camcorder

[edDV]

I'm sorry ,didn't catch that.Can you explain that about a TV connection??
NTSC/PAL worst?What's that mean.I use PAL camcorder

I'm talking about connecting your DVD player to your TV.

Composire PAL / NTSC worst.
S-Video better
Y, Pr, Pb (interlace) best

Y, Pr, Pb (progressive) quality will depend on the DVD player's de-interlacing hardware.