[FFmpeg-user] concat one video file and multiple audio files

ropiafoldetnezi ropiafoldetnezi at gmail.com
Fri Jan 12 16:43:33 EET 2018


hi,

thank you all!

@dopelabs method worked for me best, and as i will make many videos the
speed boost is also welcome, thank you!

as i would like to create videos dynamicly (and generate ffmpeg commands
also), it would be easier for me to have all input in one command (instead
of list file), is it possibel?

thx


On Fri, Jan 12, 2018 at 11:18 AM, DopeLabs <dopelabs at dubstep.fm> wrote:

> you can use concat like this
>
> ffmpeg -f concat -i 'textfile.txt' -i video1.mp4 -c copy videoout.mp4
>
> the text file contains the list of audio files you want to concat.
>
>
> file 'f1.mp3'
> file 'n1.mp3'
> file 'f2.mp3'
> file 'm1.mp3'
> file 'f3.mp3'
> file 'v1.mp3'
>
> as long as all your audio files are encoded at the same bitrate,
> samplerate, etc, you shouldnt have any problems.
>
> this also doesnt require a re-encode, you can stream copy which will be
> much much faster. anything you send through a filter complex usually will
> need to be re-encoded.
>
>
> hope this helps =]
>
>
>
> > On Jan 11, 2018, at 9:43 50PM, ropiafoldetnezi <
> ropiafoldetnezi at gmail.com> wrote:
> >
> > Thank you!
> >
> > Is it possible to do the concat and the map in one step (one command)?
> >
> >
> > On Jan 11, 2018 11:11 PM, "Moritz Barsnick" <barsnick at gmx.net> wrote:
> >
> > On Thu, Jan 11, 2018 at 22:57:11 +0100, ropiafoldetnezi wrote:
> >> multiple sources:
> >> 1 video file (.mp4)
> >> 6 separate audio files (.mps)
> > [...]
> >> the command i tried (on windows 10):
> >> ffmpeg -i video1.mp4 -i f1.mp3 -i n1.mp3 -i f2.mp3 -i m1.mp3 -i f3.mp3
> -i
> >> v1.mp3 -filter_complex
> >> "[0:v:0][1:a:0][2:a:0][3:a:0][4:a:0][5:a:0][6:a:0]concat=n=
> > 7:v=1:a=1[outv][outa]"
> >> -map "[outv]" -map "[outa]" output/v1_n1_m1_v1_t_02.mp4
> >
> > You should be concat'ing the audio separately from the video, and then
> > mapping video and "[outa]" separately.
> >
> > You can't concat an audio stream to a video.
> >
> > Moritz
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-- 

├╝dv
bal


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