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Old Nov 17, 2012, 12:15 PM   #1
cos.
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How to join or split AVI videos without re-encoding?

Googling for how to do this on OS X (I have Snow Leopard) turned up some suggestions to try AVITools, which I downloaded. However when I take an AVI file straight off my camera card and open it in AVITools it tells me "could not identify video track".

I'm not wedded to AVITools if there's another option out there. Is it better for me to spend some time trying to troubleshoot this specific problem, or should I look for something else? I'm not sure.

Do any of you have an easy way to join or split AVI videos on OS X?

(I understand that to do this the videos inside the AVI files would need to be the same format, but I want this to work with videos that are all from the same camera so that's not a problem)

Last edited by cos.; Nov 17, 2012 at 12:33 PM.
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Old Nov 17, 2012, 02:00 PM   #2
Dave Braine
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Found this although not tried it yet:
http://www.wondershare.net/ad/video-...FcbLtAodE3kAsQ
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Old Nov 17, 2012, 02:57 PM   #3
cos.
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Re: Wondershare

Quote:
Originally Posted by Dave Braine View Post
Found this although not tried it yet:
http://www.wondershare.net/ad/video-...FcbLtAodE3kAsQ
Huh, what suggests to you that it's possible to do so using that piece of software? I didn't see anything on its web page that indicates it can do it. Just in case, I downloaded it and ran it... and I still don't see any such feature. What am I not noticing?
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Old Nov 17, 2012, 06:23 PM   #4
cos.
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avidemux

Quote:
Originally Posted by Dave Braine View Post
Found this although not tried it yet:
http://www.wondershare.net/ad/video-...FcbLtAodE3kAsQ
As far as I can tell that program does not do this.

However, I found a solution, at least for joining videos: avidemux

Thanks to a reddit commenter on my post there.
http://www.reddit.com/r/VideoEditing...ut_reencoding/
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Old Nov 18, 2012, 06:04 AM   #5
Quotenfrau
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install MacPorts https://www.macports.org/install.php

Code:
port install mplayer
installs mencoder

Code:
cat file1.avi file2.avi file3.avi > video_draft.avi
after appending the data together using cat above, you need to re-index the draft movie like this:

Code:
mencoder video_draft.avi -o video_final.avi -forceidx -ovc copy -oac copy
Now you're video_final.avi file will be right to go.
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Old Nov 18, 2012, 11:23 AM   #6
Dave Braine
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Quote:
Huh, what suggests to you that it's possible to do so using that piece of software? I didn't see anything on its web page that indicates it can do it
Quote:
Wondershare Video Editor for Win & Mac
Trim, cut, split, merge, rotate and mix videos/audios/photos
Note the word "merge", taken from the webpage

Quote:
Just in case, I downloaded it and ran it... and I still don't see any such feature. What am I not noticing?
Add your movies then go to the Share menu and choose Creating Video...

Quote:
although not tried it yet
I have now, and it works fine for me.
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Old Mar 7, 2013, 01:22 PM   #7
illimanisnow
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I have another solution, QuickTime 7, which still works in Mountain Lion.
Steps:
1. Open both movies in QuickTime 7.
2. In the 1st movie, go with the marker to the end of the movie.
3. Go to the 2nd movie and go to the the "Select All" command in the Edit menu (or use the shortcut of your preference)
4. Select the "Copy" command in the Edit menu (or use the shortcut of your preference)
5. Go to the 1st movie and select the "Paste" command in the Edit menu (or use the shortcut of your preference).
6. Select the "Save As" command in the File menu. Navigate wherever you want the new file and hit Save

One caveat: the movie will be saved as .mov
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Old Mar 7, 2013, 04:50 PM   #8
phoenixsan
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Maybe....

this can be helpful:

http://hintsforums.macworld.com/showthread.php?t=66965

http://www.iskysoft.com/article/comb...es-on-mac.html

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Old Apr 19, 2014, 08:35 AM   #9
cool11
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I need a solution for joining video files too.
But a universal one, not only .avi or .mov.
I don't know if quicktime is doing merging of every video format.

Is there any tool that you used with success?
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Old Apr 19, 2014, 01:33 PM   #10
EmaDaCuz
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If the files have the same bitrate and compression, then you can use "cat" from the terminal.

Code:
cat movie1.xyz movie2.xyz > bigmovie.xyz
Merging files of different format is, as far as I know, impossible without transcoding. Maybe mencoder could work, but I am not so sure.
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Old Apr 21, 2014, 03:02 PM   #11
cool11
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I need a solution with graphical interface.
I expect it from mac, I am not using linux.
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Old Apr 24, 2014, 04:53 AM   #12
cool11
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I found a nice program, xilisoft video joiner, it does the task, but it re-encodes video.
So, I need a solution for merge videos, with no re-encoding.
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Old Apr 24, 2014, 09:41 PM   #13
MisterMe
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Quote:
Originally Posted by cool11 View Post
I found a nice program, xilisoft video joiner, it does the task, but it re-encodes video.
So, I need a solution for merge videos, with no re-encoding.
You are on a fool's errand. AVI video tracks are usually not frame-based. The video tracks of the two videos to be joined must be transcoded to a frame-based format before they can be joined. They may then be transcoded back.

It may be possible for the transcode process to be conducted in RAM rather than in a stored file. The bottomline is that files tracks must be transcoded.
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