Avisynth help please.

[Otokonokotron]

okay, The only thing I know about this is that it functions on a command line basis. For some reason I have not been able to reach their main site. I don't really have anything much to go on, cuz i think that's where a lot of basics are covered.
so if anyone has any ideas as to where i can learn about this program, and apparently all the amazing plug-ins i've been hearing about, i'd be really happy.

but, more specifically, I am having trouble resizing a video. it's not the resizing that is the problem, rather another complication when I import it into Adobe premiere. when imported, it's duration is increased by about 2 mins. I believe that that happens because it has a variable frame rate. from what I've read, you can write an Avisynth script that will change the video from VFR to a constant frame rate. other than needing to know how to do that, I'm also not sure if there are other complications that would be created by doing that. (for some reason Handbrake does not make the change in duration, but i'd like to use adobe media encoder, because i can pause it every few hours or so to go easier on my laptop)

again, i'm really sorry for how little i know about Avisynth, also let me know if I was to vague with my information, i'm mostly after the script to convert VFR to CBR, and to know about any complications that might cause.

thanks

EDIT: I wasn't sure whether to put this here or in the newbie section

[sanlyn]

Welcome. It's not possible to answer all your questions in a single post. But you have to start somewhere:

Avisynth 2.5.8 installer.
Run the installer (take the defaults).
Then go to START -> Programs -> Avisynth 2.5 -> Avisynth Documentation

or start here: http://avisynth.org/mediawiki/Main_Page#New_to_AviSynth_-_start_here
main page: http://avisynth.org/mediawiki/Main_Page

The online help installed with Avisynth looks similar to this page: http://avisynth.org/mediawiki/BicubicResize

You didn't give much information about the "video" you're working with, which could encompass a great many types of video sources. But frankly you're better off doing much of what you want in Avisynth than with Adobe. What you seem to want to do has more to do with conversion and restoration than with "editing".

[Otokonokotron]

thank you for answering me, any help is greatly appreciated. for some reason, the only way i can view Avisynth's main site is by using google chrome and loading a cached version of the website. no one else seems to be having the problem, so... oh well. but thanks for pointing me towards the documentation part.

EDIT: *looking at the documentation* thank you so much for this, now i can finally see the basic fundamental's of what i need to learn

[poisondeathray]

What is the source video from ?

Use mediainfo (view=>text) copy & paste the information back here

[sanlyn]

thank you for answering me, any help is greatly appreciated. for some reason, the only way i can view Avisynth's main site is by using google chrome and loading a cached version of the website. no one else seems to be having the problem, so... oh well. but thanks for pointing me towards the documentation part.

EDIT: *looking at the documentation* thank you so much for this, now i can finally see the basic fundamental's of what i need to learn

You're welcome, sorry this isn't something that has a one paragraph answer . In this case it might be a good idea to start with a specific problem rather than trying to learn Avisynth all-at-once. Poisondeathray has a good suggestion, in referring to a specific video and problem. Easier to get things in motion that way.

I don't know what the browser problem could be. I've been using Firefox exclusively for 4 years now, no problems. Good luck.

[Otokonokotron]

hehe well, since i'm here... ^^'''

here's the mediainfo stuff, under the video section you can see that it has a variable frame rate:

General
Complete name                            : C:\Users\Joshua\Desktop\Live Events\New folder\Miku 39's Giving Day 2010\givingdayprojectDIVA-2010.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom
File size                                : 7.38 GiB
Duration                                 : 1h 58mn
Overall bit rate mode                    : Variable
Overall bit rate                         : 8 919 Kbps
Encoded date                             : UTC 2010-09-07 03:47:14
Tagged date                              : UTC 2010-09-07 03:47:14

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.1
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 1h 58mn
Bit rate mode                            : Variable
Bit rate                                 : 7 344 Kbps
Maximum bit rate                         : 40.0 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Variable
Frame rate                               : 30.846 fps
Original frame rate                      : 29.970 fps
Minimum frame rate                       : 29.970 fps
Maximum frame rate                       : 59.940 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.115
Stream size                              : 6.07 GiB (82%)
Writing library                          : x264 core 94 r1583 7608d73
Encoding settings                        : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=0.90:0.20 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=9 / sliced_threads=0 / slices=4 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=24.0 / qcomp=0.80 / qpmin=5 / qpmax=51 / qpstep=10 / vbv_maxrate=40000 / vbv_bufsize=30000 / crf-max=0.0 / ip_ratio=1.40 / aq=2:1.00 / nal_hrd=vbr
Encoded date                             : UTC 2010-09-06 04:05:56
Tagged date                              : UTC 2010-09-07 03:56:39
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio #1
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 1h 58mn
Bit rate mode                            : Variable
Bit rate                                 : 446 Kbps
Maximum bit rate                         : 478 Kbps
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Delay relative to video                  : 67ms
Stream size                              : 378 MiB (5%)
Title                                    : 1
Encoded date                             : UTC 2010-09-07 03:54:34
Tagged date                              : UTC 2010-09-07 03:56:39

Audio #2
ID                                       : 3
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 1h 58mn
Bit rate mode                            : Variable
Bit rate                                 : 1 123 Kbps
Maximum bit rate                         : 1 164 Kbps
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Delay relative to video                  : 67ms
Stream size                              : 951 MiB (13%)
Title                                    : 2
Encoded date                             : UTC 2010-09-07 03:55:15
Tagged date                              : UTC 2010-09-07 03:56:39

Menu
00:00:00.000                             : ƒnƒWƒ�ƒeƒmƒIƒg
00:02:30.483                             : Project DIVA desu.�@�‰‰¹ƒ~ƒN
00:05:25.658                             : ƒ��[ƒ‹ƒhƒCƒYƒ}ƒCƒ“�@�‰‰¹ƒ~ƒN
00:08:23.002                             : ‚¦‚ê‚*‚Æ‚è‚Á‚*�E‚¦‚ñ‚¶‚¥‚¤�@�‰‰¹ƒ~ƒN
00:14:52.057                             : —ö‚·‚éVOC@LOID�@�‰‰¹ƒ~ƒN
00:18:07.820                             : Dear cocoa girls�@�‰‰¹ƒ~ƒN
00:21:40.299                             : StargazeR�@�‰‰¹ƒ~ƒN
00:25:12.844                             : -ˆ¥ŽA-
00:25:32.864                             : The secret garden�@�‰‰¹ƒ~ƒN
00:28:54.099                             : ƒ�ƒhƒŒ�[�@ƒ~ƒ‰ƒNƒ‹ƒyƒCƒ“ƒg�@�‰‰¹ƒ~ƒN
00:30:07.038                             : ƒ�ƒhƒŒ�[�@Innocence�@�‰‰¹ƒ~ƒN
00:31:27.552                             : ƒ�ƒhƒŒ�[�@ƒnƒg�@�‰‰¹ƒ~ƒN
00:32:03.554                             : ƒ�ƒhƒŒ�[�@‚Ý‚*‚Ý‚*‹Û‚É‚²’�ˆÓ�I�@�‰‰¹ƒ~ƒN
00:33:16.327                             : ƒ�ƒhƒŒ�[�@‚Û‚Á‚Ò‚Á‚Û�[�@�‰‰¹ƒ~ƒN
00:34:14.485                             : ƒ�ƒhƒŒ�[�@ƒTƒˆƒiƒ‰ƒOƒbƒoƒC�@�‰‰¹ƒ~ƒN
00:35:21.452                             : ƒ�ƒhƒŒ�[�@ƒ~ƒ‰ƒNƒ‹ƒyƒCƒ“ƒg�@�‰‰¹ƒ~ƒN
00:37:16.400                             : -SEGA�`-
00:37:31.582                             : ƒ�ƒ~ƒI‚ƃVƒ“ƒfƒŒƒ‰�@�‰‰¹ƒ~ƒN
00:42:16.033                             : Dear�@�‰‰¹ƒ~ƒN
00:46:52.309                             : ƒ�ƒhƒŒ�[�@— •\ƒ‰ƒo�[ƒY�@�‰‰¹ƒ~ƒN
00:49:26.296                             : ƒ�ƒhƒŒ�[�@ƒpƒYƒ‹�@�‰‰¹ƒ~ƒN
00:51:07.731                             : ƒ�ƒhƒŒ�[�@Voice�@�‰‰¹ƒ~ƒN
00:51:49.106                             : ƒ�ƒhƒŒ�[�@1ŒŽ6“ú�@�‰‰¹ƒ~ƒN
00:54:08.578                             : �¯‹ûƒ†�[ƒgƒsƒA�@�„‰¹ƒ‹ƒJ
00:57:23.673                             : ƒ_ƒuƒ‹ƒ‰ƒŠƒAƒbƒg�@�„‰¹ƒ‹ƒJ
01:00:50.647                             : Just Be Friends�@�„‰¹ƒ‹ƒJ
01:04:05.174                             : -”º‘t-
01:04:24.694                             : magnet�@ƒ~ƒN�•ƒ‹ƒJ
01:07:30.379                             : Alice�@�‰‰¹ƒ~ƒN
01:10:22.718                             : ‚ ‚È‚½‚̉̕P�@�‰‰¹ƒ~ƒN
01:14:05.107                             : moon�@�‰‰¹ƒ~ƒN
01:17:15.631                             : �‰‰¹ƒ~ƒN‚Ì�ÁŽ¸�@�‰‰¹ƒ~ƒN
01:19:35.771                             : -”º‘t-
01:20:18.480                             : ˜F�S—n‰ð�@‹¾‰¹ƒŠƒ“
01:24:03.638                             : ƒRƒRƒ��@‹¾‰¹ƒŠƒ“
01:27:38.253                             : ‰EŒ¨‚Ì’±�@ƒŠƒ“�EƒŒƒ“
01:30:39.934                             : Promise�@ƒ~ƒN�•ƒŠƒ“
01:33:44.118                             : from Y to Y�@�‰‰¹ƒ~ƒN
01:36:48.803                             : ƒTƒCƒnƒe�@�‰‰¹ƒ~ƒN
01:39:37.638                             : ƒXƒgƒ�ƒ{ƒiƒCƒc�@�‰‰¹ƒ~ƒN
01:42:34.148                             : SPiCa�@�‰‰¹ƒ~ƒN
01:47:22.769                             : �iƒAƒ“ƒR�[ƒ‹�j�‡Œ¾—t�@�‰‰¹ƒ~ƒN
01:50:32.292                             : �iƒAƒ“ƒR�[ƒ‹�jƒ�ƒ‹ƒg�@�‰‰¹ƒ~ƒN
01:54:51.217                             : ƒNƒŒƒWƒbƒg

so basically, adobe i believe increases the duration of the video perhaps because of the VFR. here is a screencap from media encoder showing the time increase, and below it one of Handbrake, which shows now duration increase. got no idea why.

adobe media encoder
and
Handbrake

i'm concerned if changing from variable, to constant, has any effects to the video/frames that i wouldnt know of.

[poisondeathray]

i'm concerned if changing from variable, to constant, has any effects to the video/frames that i wouldnt know of.

It inserts duplicate frames to roughly keep everything in sync. The side effects are it might go in /out of sync very slightly in some sections (the more variable a video, the more issues) , and it's less efficient since you're inserting duplicate (added) frames .And of course re-encoding with a lossy format means you lose quality

A VFR video is created in the first place by dropping duplicate frames. Compared to the CFR video from which it was derived from, a VFR video will have fewer frames. Timecodes are used to keep everything in sync (the media player speeds up and slows down in sections according to the timecodes) . You're basically trying to reverse that process by adding back in frames in approximately the correct locations (it' s not perfect, hence the slightly in/out of sync issues)

If you want it "perfect" keep it VFR. You can just use handbrake to do this, or encode it CFR and insert timecodes afterwards.

[Otokonokotron]

hmm, yeah, a lot of that seems over my head right now, so, i may end up using handbrake as u suggested. thanks a lot ^^ i'll just have to go learn about timecode more, it seems, if i wanna change it more accurately to a CFR.