vb.net and ffmpeg to join mulitple videos

[rafhelp]

Hi,

can you use ffmpeg to join 2 video files together?

I have tried two methods which dont work.

both files are avi and output is avi


ffmpeg -i "concat:RAF153.avi|RAF157.avi" -f avi -acodec copy -vcodec copy output.avi
ffmpeg -i "c:\clips\RAF 153.avi" -i "c:\clips\RAF 157.avi" -f avi -acodec copy -vcodec copy "c:\clips\output.avi"

both dont work.

the ffmpeg was located in c:\clips\

[namrekka]

Perhaps this helps:

http://ffmpeg.org/faq.html#How-can-I...deo-files_003f

[rafhelp]

tried that got it to work.

convert all files to mpg using ffmpeg

then use copy /b to copy all files (concat) to a single mpg

then I convert the mpg to avi

I use "-qscale 6" when converting to mpg

but the final video is not the right length (combined length of other videos)

if i play it using windows media player also i see some clips and sometimes the audio is overlaid on wrong section of video image etc..

so whats wrong?

do ALL the input files have to be the same size and bit rate etc..?

[jcis]

I used this for converting WMV videos to MPG, then concatenating all MPGs and finally convertin back to WMV, in this example i concat the same video file for simplicity, it should work the same for AVIs. Concatenation in DOS is done using Type.

ffmpeg.exe -i 1.wmv -sameq 1.mpg
copy 1.mpg 2.mpg
type 1.mpg 2.mpg > 3.mpg
ffmpeg.exe -i 3.mpg -sameq Result.wmv

[rafhelp]

why use "type"