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View Full Version : Am I a total ignorant?


Painkiller90
26th May 2002, 00:45
Well, there are some things I'd like to discuss here.First of all,it seems to me that Ogg Vorbis files higher than ~150kbits are higher than .mp3 files of similar aver.bitrate.Is that so?Then there is a strange thing I encountered while using Nandub.I saved a 3:30 min. DVD2AVI project, I encoded the sound to a VRBmp3 file using BeSweet, having set the delay value as shown on the AC3 filename, encoded the video using VirtualDub with XviD codec(2-Pass) and then muxed the audio and video using Nandub, and setting the same delay value at Interleaving as before.When I opened the output file in Nandub, the "change frame rate so audio and video durations match" tag indicated that I should increase frame rate from 25.000 to 25.002 frames.Why is that so?Aren't they supposed to be fully synced?Then, do you know what kind of parameters must be set at the bsplayer.ini file to modify the fonts and the position?I checked their forum but things are a bit misty in there.Finally, I can't find the CD Launcher Guides you had published.Where should I look?
Thank you for your support and your patience, nad a big thanks to DSPguru for his new in_vorbis Winamp codec.I had the same problem (it wouldn't play .ogg files encoded by BeSweet) but now it works like a dream.Thanks again!

Painkiller90
26th May 2002, 00:47
Sorry,I meant that Ogg Vorbis ~150 are LARGER than similar bitrate mp3s.

theReal
27th May 2002, 01:17
Try muxing the files in Nandub without setting the delay again.
I think the delay has been taken care of in the encoding process by BeSweet. At least I have never set a delay value in Nandub for muxing (only when muxing AC3, which hasn't been re-encoded before), and it has always been ok.

Painkiller90
27th May 2002, 10:10
I have tried that also, but then the frame rate needed to be DECREASED instead of increased to make it fully sync.Dunno!
Anyway, i found out how to process the .ini file,it was much easier than I thought, but there's still the question remaining concerning the Ogg Vorbis.Is the file really larger at high bitrates than mp3?And to think that I didn't use a lowpass filter while encoding at ABR, which would decrease the size of the file even more...:confused:

Asmodian
30th May 2002, 02:45
I don't understand what you mean by larger at the same bit-rate? Aren't size/length and bit-rate basically the same thing? (well vorbis is in an ogg so has some extra headers but MP3 probably has something similar so..) How are you setting the quality of your vorbis encodes? If you are using ABR with vorbis I would suggest using VBR, you lose some file size predictability (so compress the audio before the video if you want to fill a CD exactly) but it sounds better then ABR. The reason vorbis is superior to MP3 is that vorbis is higher audible quality at the same size/bit-rate (or the same audible quality at a lower bit-rate).
BeSweet or Oggenc might make larger files at the same ABR setting but that is not the actual bit-rate used by either MP3 or vorbis (if the ogg file is significantly larger the vorbis is using a higher-on-average bit-rate).

Painkiller90
30th May 2002, 13:47
Hmmm, let me explain,ok?Let's say I set the quality value at 0.300 at Besweet for an ogg file,ok?The bitrate value shown near the quality value is about 104kbps (I think).If you encode the same file at ABR of the same average bitrate(104kbps), you get a larger mp3 file than the ogg.OK?Now if you set the value of quality at 0.800 then the value near it is set at 245kbps.If you encode it as an ABR mp3 of 245Kbps, then the mp3 file is smaller than the ogg one.Do I make a wrong comparison?I mean the value near quality does NOT show the nominal bitrate?Of course the ogg file is always a VBR file, and it does sound better at lower bitrates than MP3 does, but it does strike me as a bit odd that when increasing the quality value, the size of the file grows larger than the mp3s...Maybe I'm wrong...dunno.

theReal
30th May 2002, 15:25
Can you check the actual bitrate of the .ogg file in the end? Because you say it's VBR and it only says "about 104kbit" before encoding.

I guess this is like with mp3 VBR: Lame --alt-preset standard makes files of "about 192kbit", but depending on the file, you can end up with 140kbit or with 215kbit.

With VBR, unlike with ABR, the bitrate is totally free, so I think the ogg files you make are just having a totally different bitrate than the ABR mp3s you make. Comparing the sizes doesn't say anything.

Painkiller90
31st May 2002, 11:50
You are probably right...unfortunately there is no option in Winamp to show the average bitrate in ogg files, as there is for VBR mp3s, which would be an easy way to compare them...Anyway, i think you have enlightened me...:) Thank you!

DSPguru
31st May 2002, 11:54
BeSweet prints the actual average bitrate after conversion finished.
find it at the end of the logfile.