Auto mode for audio: too much in size!

[alessandrone]

Well, before all I would like to say a big big thank you to Len0x for his beautiful software, and everyone support it.
Second, I have just upgraded to the latest stable version.
Third, please excuse me if this is something already dealt with; I'm not so good with english so I could haven't been able to find the information.

And now, here is my question:

today I'm trying to resizing a divx; here's the log (it's not finished so don't worry for it):

====================================================
[06/01/2007 17.54.34] AutoGK 2.40
[06/01/2007 17.54.34] OS: WinXP (5.1.2600).2
[06/01/2007 17.54.34] Job started.
[06/01/2007 17.54.34] Input file: D:\avi\movies\La_Cospirazione.avi
[06/01/2007 17.54.34] Input codec: DivX 5
[06/01/2007 17.54.34] Source duration: 2h 3mn 15s 240ms
[06/01/2007 17.54.34] Output file: D:\avi\movies\La_Cospirazione_agk.avi
[06/01/2007 17.54.34] Output codec: XviD
[06/01/2007 17.54.34] Audio 1: 448 Kbps AC3 6ch
[06/01/2007 17.54.34] Subtitles: none
[06/01/2007 17.54.34] Format: AVI
[06/01/2007 17.54.34] Target size: 780Mb
[06/01/2007 17.54.34] Audio 1 settings: Auto
[06/01/2007 17.54.34] Started encoding.
[06/01/2007 17.54.34] Source resolution: 560x288
[06/01/2007 17.54.34] Source fps: 25
[06/01/2007 17.54.34] Analyzing source.
[06/01/2007 18.14.06] Source is considered to be progressive.
[06/01/2007 18.14.06] Output will contain 184881 frames
[06/01/2007 18.14.06] Demuxing audio.
[06/01/2007 18.15.52] Audio1 size: 414,132,992 bytes (394.95 Mb)
[06/01/2007 18.15.52] Overhead: 1,232,512 bytes (1.18 Mb)
[06/01/2007 18.15.52] Video size: 402,523,776 bytes (383.88 Mb)
[06/01/2007 18.15.52] Running compressibility test.
[06/01/2007 18.21.58] Duration was: 6 minutes 5 seconds
[06/01/2007 18.21.58] Speed was: 25,28 fps.
[06/01/2007 18.21.58] Compressibility percentage is: 28,85
[06/01/2007 18.21.58] Chosen resolution is: 336x176 ( AR: 1,91 )
[06/01/2007 18.21.58] Predicted comptest value is: 78,67%
[06/01/2007 18.21.58] Running first pass.
[06/01/2007 18.53.20] Duration was: 31 minutes 21 seconds
[06/01/2007 18.53.20] Speed was: 98,24 fps.
[06/01/2007 18.53.20] Expected quality of first pass size: 55,99%
[06/01/2007 18.53.20] Trying to adjust settings.
[06/01/2007 18.53.20] Chosen resolution is: 288x144 ( AR: 2,00 )
[06/01/2007 18.53.20] Predicted comptest value is: 79,84
[06/01/2007 18.53.20] Re-running first pass.
[06/01/2007 19.18.03] Duration was: 24 minutes 43 seconds
[06/01/2007 19.18.03] Speed was: 124,66 fps.
[06/01/2007 19.18.04] Expected quality of first pass size: 72,71%
[06/01/2007 19.18.04] Running second pass.


So people, why is the audio so much sized? I expected that ac3 audio would be converted in mp3 to be less, instead I see a not so fantastic resolution for video, and too much for audio. What should I do so? Maybe the auto settings for audio are not so precise?

Thank you :)

[BigDid]

[I]... So people, why is the audio so much sized? I expected that ac3 audio would be converted in mp3 to be less, instead I see a not so fantastic resolution for video, and too much for audio. What should I do so? Maybe the auto settings for audio are not so precise?

Thank you :)
Hi, welcome to the forum and happy new year.

Thanks for the log it is useful to provide answers.

1/ Audio is big cause it is AC3 448Kbp/s
2/ Above 700Mo (1cd) auto for audio keeps the original, below it converts to MP3 see FAQ 2.3 here: http://forum.doom9.org/showthread.php?t=72679 or FAQ 5.12 for AVI Input
3/ You have to specify other settings for audio (for the same overall size); either
- a 2channels AC3 input that will be 192 or 224 kbp/s if existant or
- a MP3 (VBR or CBR) 2channels encoding below 192 kbp/s

Your 6 channels AC3 is 394 Mb for 448 kbp/s; a 224 kbp/s will be 197 Mb and a 128 kbp/s(MP3) will be 112Mb. If you have difficulties with the maths, you can use weaver4 reversebit calculator here: http://forum.doom9.org/showthread.php?p=888886#post888886

Happy encoding

Did

Edit1/: just missed source is avi not vob; see adding in 2/
Your AVI source size is already resized to 560*288, you will loose quality by re-encoding (and resizing) the video ...
Edit2/ What kind of gear (processor) do you have to get more than 100fps, a core2duo?

[alessandrone]

I feel a bit ashamed for not having found into the faqs the information I needed, I promise I will read them carefully next time :)

Thanks for the detailed information; I have always encoded for fitting in a cd (700 MB) so I lost this piece of substance, as it always converted the audio in mp3, and since in this case I had just to re-encode for filling a dvd media with 6 movies I decided to use a 780 MB size...

About my processor, I don't know the reason of that... My notebook has got a humble Sempron 2800+, maybe would a "re-run" be faster?

What about the divx reencoding? Does it lose only the bitrate value, or much more considering it was already compressed? Honestly, sorry for being unforgivably and totally newbie...

[BigDid]

... since in this case I had just to re-encode for filling a dvd media with 6 movies I decided to use a 780 MB size...
780 * 6 = 4680Mb; won't fit in a DVD (at least -R that is 4480), this is why Len0x has made a special 1/6 DVD at 746Mb


What about the divx reencoding? Does it lose only the bitrate value, or much more considering it was already compressed? Honestly, sorry for being unforgivably and totally newbie...
I will not state for divx (I don't use it) but for xvid:
-Resizing will loose details and sharpness
-Re-encoding will introduce artifacts, noise, distorsion etc...
Reencoding with resizing will cumulate both...
Just compare (with MPC at full screen) your source and your copy :scared:

Did

[CWR03]

[06/01/2007 17.54.34] Input file: D:\avi\movies\[DIVX-ITA-AC3] - The.Constant.Gardener - La.Cospirazione.avi
You should also feel ashamed at violating the forum rules (http://forum.doom9.org/forum-rules.htm) so blatantly, since the title of your file is clearly indicative of a downloaded movie.

[alessandrone]

@CWR03: I'm a blatant ignorant, thank you for the remark. Now I'd try to edit my message knowing that it won't repair my shabby figure. ;(

@BigDid: as you know you're right! This is the second time I did this mistake! In fact, after some calculation and erroneous encoding, I finally sized the tv series "La Freccia Nera" for my father (a 6 episodes fiction from satellite) at 740MB (I stayed tight not to risk they wouldn't fit in)... Yesterday I forgot this again and made two movies at 780! Gosh... I'm happy to see that the developers have added the 1/6 dvdr, I did not noticed yet.

[jggimi]

Now I'd try to edit my message knowing that it won't repair my shabby figure. ;(We do not condone IP theft of any kind, only Fair Use of copyrighted content for which you are licensed.

Neither editing your posts, nor reposting an edited question after a moderator has closed your thread ... will help you.

Thread closed per Rule 6. We don't assist with downloaded content. For more information on our interpretation of Rule 6, please see the announcement at the top of the Newbie Forum.

Thank you.