Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > General > Linux, Mac OS X, & Co

Reply
 
Thread Tools Search this Thread Display Modes
Old 1st November 2004, 16:08   #1  |  Link
synaptical
Registered User
 
Join Date: Sep 2004
Posts: 5
newb: avimerge help -- merge loses video

hey there - my first post to these forums. i have learned a lot by lurking and reading here, but now i'm stuck.

the problem is i have some backups that rip and enconde to multiple chapters, but when i use avimerge on the finished products, the video drops out on playback when it gets to the second chapter. the sound continues, but no video, only a black screen. there's also an annoying audio "blip" right as the chapter changes. i can't figure out what i'm doing wrong, can anyone assist?

(and btw, is there any shortcut for merging multiple chapters without having to enter each filename in the -i option? )

thanks.
synaptical is offline   Reply With Quote
Old 10th November 2004, 17:44   #2  |  Link
synaptical
Registered User
 
Join Date: Sep 2004
Posts: 5
all the responses, i'm underwhelmed.

well what about audio sync issues? does anyone know anything about that?
synaptical is offline   Reply With Quote
Old 10th November 2004, 18:10   #3  |  Link
albertgasset
Registered User
 
albertgasset's Avatar
 
Join Date: Jan 2003
Location: Barcelona
Posts: 68
The '-i' option doesn't chain the video files, it muxes them (e.g.: multiple audio tracks for different languages). You need a video editor to concatenate the video files like avidemux or mencoder. Are you encoding the chapters separated for any particular reason? If not, I think it's better to do it at once (faster, better compression).
albertgasset is offline   Reply With Quote
Old 10th November 2004, 19:01   #4  |  Link
synaptical
Registered User
 
Join Date: Sep 2004
Posts: 5
Quote:
Originally posted by albertgasset
The '-i' option doesn't chain the video files, it muxes them (e.g.: multiple audio tracks for different languages). You need a video editor to concatenate the video files like avidemux or mencoder. Are you encoding the chapters separated for any particular reason? If not, I think it's better to do it at once (faster, better compression).
thanks. the help and man page, though, says the -i option is to specify what files to merge. am i misunderstanding something?

one of the 17 chapters apparently contained no real data, and i got an error when i was ripping the title that said to discard the chapter (using dvd::rip). when i select the other 16, it rips them to separate directories that i couldn't find a way to encode except one by one.

Code:
NAME
       avimerge - merge several AVI-files into one

SYNOPSIS
       avimerge -o name -i file ...  [ -p file ] [ -a num ] [ -A num ] [ -b
       num ] [ -f commentfile ] [ -x indexfile ]

DESCRIPTION
       avimerge merges several AVI-files into one. Can also be used to fix an
       index of a broken file and can also replace audio tracks or muxes new
       ones. It can read raw AC3 and MP3 files for multplexing.

OPTIONS
       -o name
              Specify the name of the output file.

       -i file
              Specify the name(s) of the input file(s) to merge into the output file.
synaptical is offline   Reply With Quote
Old 10th November 2004, 21:19   #5  |  Link
albertgasset
Registered User
 
albertgasset's Avatar
 
Join Date: Jan 2003
Location: Barcelona
Posts: 68
Quote:
Originally posted by synaptical
[B]thanks. the help and man page, though, says the -i option is to specify what files to merge. am i misunderstanding something?
No, sorry, I was worng (I was confusing '-i' with '-p'). You're concatenating compressed files, right? This is often problematic with some codecs. You could try this with mencoder:
Code:
cat 1.avi 2.avi 3.avi | mecoder -o out.avi -noidx -oac copy -ovc copy -
Or rip all chapters of a title at once with dvd::rip, setting the "Specify chapter mode" to "No".
albertgasset is offline   Reply With Quote
Old 12th November 2004, 22:09   #6  |  Link
synaptical
Registered User
 
Join Date: Sep 2004
Posts: 5
thanks, i will try that.

this sync issue is the worst, though. it happens with both transcode with dvd::rip and mencoder with acidrip. i cannot figure out what on earth i am doing wrong. i've done single pass, two pass, zoom to full frame deinterlacing, no deinterlacing, xvid, xvid4, ffmpeg, changed the bit rate (automatically only, through the target size), re-ripped, etc. nothing works.

1 backup seemingly at random will be okay, and that sometimes won't be viewable on windows without a weird effect like massive frame drops or something. some will be out of sync the whole movie, others will go increasingly out of sync as the movie goes on until at the end there will be a really massive delay -- seconds. i have followed all the guides i could find to a tee, but i figure i must be ignorant of something really basic to be getting such horrible results with even default settings.

also, i have an xp-mobile @ 2200Mhz, and right now during encoding i am getting ~7-10fps. what is that about? shouldn't it be a lot faster than that?
synaptical is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 06:48.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.