View Full Version : Tip: Join two avi file with mencoder
kd7swh
January 13th, 2007, 12:11 AM
Joining two or more avi files is easy with mencoder.
Here is a simple script that I use to do it:
# MjAVI - 2007
#Mencoder needs to be installed for this script to work
#The Numbers in this script could be changed to combine more than two files.
# Mencoder also supports mpeg files. So the .avi could also be changed to .mpg
echo "Script to combine two avi files, while syncing audio."
echo "usage: ./mjavi a1.avi a2.avi combined_temp.avi final.avi"
cat "$1" "$2" > "$3";
mencoder -forceidx -oac copy -ovc copy "$3" -o "$4"
the cat command combines 1 and 2 into 3, but the audio isn't in sync. So, 3 is indexed with mencoder into 4 which has nicely synced audio. :)
neilp85
February 6th, 2007, 08:59 AM
There's no reason to cat the two files together before encoding because mencoder can handle that as well.
mencoder -forceidx -ovc copy -oac copy -o file.avi p1.avi p2.avi ...
LucasLinard
February 12th, 2007, 05:07 AM
There's no reason to cat the two files together before encoding because mencoder can handle that as well.
mencoder -forceidx -ovc copy -oac copy -o file.avi p1.avi p2.avi ...
When I try to join 2 mpeg files, how can I make the oputput a mpg file?
If I try -of mpeg I get a lot of errores like this one:
ERROR: scr 6715.707, dts 0.000, pts 6714.866
ERROR: scr 6715.752, dts 0.000, pts 6714.962
ERROR: scr 6715.794, dts 0.000, pts 6715.058
ERROR: scr 6715.837, dts 0.000, pts 6715.122
ERROR: scr 6715.885, dts 0.000, pts 6715.218
ERROR: scr 6715.925, dts 6715.283, pts 6715.408
ERROR: scr 6715.927, dts 0.000, pts 6715.282
ERROR: scr 6715.979, dts 0.000, pts 6715.378
ERROR: scr 6716.025, dts 0.000, pts 6715.474
ERROR: scr 6716.066, dts 0.000, pts 6715.538
ERROR: scr 6716.090, dts 6715.575, pts 6715.700
Pos:6716.1s 161028f (88%) 473.28fps Trem: 0min 2904mb A-V:0.066 [2976:192]
ERROR: scr 6716.162, dts 0.000, pts 6715.634
ERROR: scr 6716.210, dts 0.000, pts 6715.730
ERROR: scr 6716.254, dts 0.000, pts 6715.794
ERROR: scr 6716.302, dts 0.000, pts 6715.890
ERROR: scr 6716.358, dts 0.000, pts 6715.954
ERROR: scr 6716.369, dts 6716.034, pts 6716.159
ERROR: scr 6716.371, dts 0.000, pts 6716.050
ERROR: scr 6716.406, dts 0.000, pts 6716.146
ERROR: scr 6716.441, dts 0.000, pts 6716.210
ERROR: scr 6716.485, dts 0.000, pts 6716.306
ERROR: scr 6716.511, dts 6716.326, pts 6716.451
Pos:6716.9s 161046f (88%) 473.30fps Trem: 0min 2904mb A-V:0.055 [2976:192]
DerArzt
February 21st, 2007, 08:41 PM
Cheers neilp85. Worked PERFECTLY.
tzulberti
February 22nd, 2007, 11:00 AM
Thanks for the tip
z987k
March 15th, 2007, 05:01 PM
When I try to join 2 mpeg files, how can I make the oputput a mpg file?
If I try -of mpeg I get a lot of errores like this one:
ERROR: scr 6715.707, dts 0.000, pts 6714.866
ERROR: scr 6715.752, dts 0.000, pts 6714.962
ERROR: scr 6715.794, dts 0.000, pts 6715.058
ERROR: scr 6715.837, dts 0.000, pts 6715.122
ERROR: scr 6715.885, dts 0.000, pts 6715.218
ERROR: scr 6715.925, dts 6715.283, pts 6715.408
ERROR: scr 6715.927, dts 0.000, pts 6715.282
ERROR: scr 6715.979, dts 0.000, pts 6715.378
ERROR: scr 6716.025, dts 0.000, pts 6715.474
ERROR: scr 6716.066, dts 0.000, pts 6715.538
ERROR: scr 6716.090, dts 6715.575, pts 6715.700
Pos:6716.1s 161028f (88%) 473.28fps Trem: 0min 2904mb A-V:0.066 [2976:192]
ERROR: scr 6716.162, dts 0.000, pts 6715.634
ERROR: scr 6716.210, dts 0.000, pts 6715.730
ERROR: scr 6716.254, dts 0.000, pts 6715.794
ERROR: scr 6716.302, dts 0.000, pts 6715.890
ERROR: scr 6716.358, dts 0.000, pts 6715.954
ERROR: scr 6716.369, dts 6716.034, pts 6716.159
ERROR: scr 6716.371, dts 0.000, pts 6716.050
ERROR: scr 6716.406, dts 0.000, pts 6716.146
ERROR: scr 6716.441, dts 0.000, pts 6716.210
ERROR: scr 6716.485, dts 0.000, pts 6716.306
ERROR: scr 6716.511, dts 6716.326, pts 6716.451
Pos:6716.9s 161046f (88%) 473.30fps Trem: 0min 2904mb A-V:0.055 [2976:192]
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-mpeg.html
Also if you have two mpg's of the same format, couldn't you just "cat 1 2 > 3"?
kd7swh
November 16th, 2007, 07:32 AM
if you just use cat, its my understanding that the index would not be preserved. this process creates a working index.
yabbadabbadont
November 16th, 2007, 07:37 AM
How about just using avimerge which is included with transcode? ;)
Edit: Wow! Holy Thread Resurrection Batman! :D
kd7swh
November 16th, 2007, 07:56 AM
I created this thread almost a year ago, a lot has changed since then.
lad3391
December 3rd, 2008, 07:23 AM
i just found it, and it works great for me. i guess my only suggestion to ppl reading this would be to type in 'cd ~/Desktop' into terminal (if thats where your files are at), no ' symbols, just the stuff between. type that before you do the mencoder command line
tdreyer1
December 12th, 2008, 03:34 AM
mencoder -forceidx -ovc copy -oac copy -o file.avi p1.avi p2.avi ...
Awesome! That worked great! :mrgreen:
deadtom
January 20th, 2009, 05:25 PM
Worked great for me too. Thanks for the info!
Lylex11
June 14th, 2009, 01:48 PM
Thanks neilp85! works a treat and real quick. Saves encoding all the files again!
HarshReality
October 10th, 2009, 01:39 PM
I'd love it if there was a right click option to just run this (mencoder script).. would save alot of typing.
yunone
October 25th, 2009, 05:28 AM
i just found it, and it works great for me. i guess my only suggestion to ppl reading this would be to type in 'cd ~/Desktop' into terminal (if thats where your files are at), no ' symbols, just the stuff between. type that before you do the mencoder command line
thank you very much for the simple tip about the file location...worked perfectly....Great little tip !
kvarley
February 6th, 2010, 12:29 PM
There's no reason to cat the two files together before encoding because mencoder can handle that as well.
mencoder -forceidx -ovc copy -oac copy -o file.avi p1.avi p2.avi ...
Thank you so much! Nice bit of code which has been much use to me. :P
mister_playboy
January 23rd, 2011, 11:21 AM
There's no reason to cat the two files together before encoding because mencoder can handle that as well.
mencoder -forceidx -ovc copy -oac copy -o file.avi p1.avi p2.avi ...
Just what I was looking for... thank you. :KS
vedavrata
January 26th, 2013, 04:16 AM
mencoder can handle that as well.
mencoder -forceidx -ovc copy -oac copy -o file.avi p1.avi p2.avi ... Thank you!
It works! [and much better than by ffmpeg! :)]
andrew.46
January 27th, 2013, 11:21 PM
It works! [and much better than by ffmpeg! :)]
Good to see that you have achieved the desired outcome but have a look at a modern copy of FFmpeg and you might find that there have been some considerable improvements in video concatenation just recently.
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