FFMPEG combining videos question

AussieDollar · Mar 10, 2019

Hi,

I'm trying to add an intro to another video.

I tried to do like this website instructs: https://www.linglom.com/multimedia/combine-mp4-files-using-ffmpeg-windows-without-re-encoding/

after using:
ffmpeg -f concat -i mylist.txt -c copy output.mp4

I get the video but the audio in is delayed by 7 seconds which is the length of the intro.

I tried this:
ffmpeg.exe -i "movie.mp4" -itsoffset 7.00 -i "movie.mp4" -map 1:v -map 0:a -c copy "movie-video-delayed.mp4"

But can't seem to find when to use it on the command promt.

Any help with this?

Wiggles · Mar 10, 2019

You need to add audio to your first clip. This can be zero volume, but needs to be there.
Google "add audio ffmpeg" for a few ways to do this.

Spent 3 days this week trying to bug fix a few issues on ffmpeg. Driving me nuts.... Justwait until you have a ratio mismatch.

BetterKnow · Mar 10, 2019

Concatenating videos on FFmpeg requires they have the same resolution, aspect ratio and SAR. Maybe check that first.

Wiggles · Mar 10, 2019

Better Know said:
Concatenating videos on FFmpeg requires they have the same resolution, aspect ratio and SAR. Maybe check that first.

That was my problem, unusual SAR and didn't want to edit the original video settings. For whatever reason padding, setsar etc I only got to within a rounding error of the same ratio.
I cane to the conclusion these videos are too old to be useful especially Vs time spent.

AussieDollar · Mar 10, 2019

Wiggles said:
You need to add audio to your first clip. This can be zero volume, but needs to be there.
Google "add audio ffmpeg" for a few ways to do this.

Spent 3 days this week trying to bug fix a few issues on ffmpeg. Driving me nuts.... Justwait until you have a ratio mismatch.

I added empty audio into the video with http://www.addaudiotovideo.com

Did the whole process again and after 7-second intro the rest of the video is rly laggy.

Wiggles · Mar 10, 2019

This kind of issue is right pain in the...
Can you use photos on Windows or imovie on Mac to get it working?

If one off then I'd say that was the solution.
If batch then maybe adapt the intro using one of those to have audio then add it to the batch of videos.

HoNeYBiRD · Mar 10, 2019

Do you need a video intro by all means? It wasn't yesterday when i played with this, but if i can remember well, it's a lot easier to use pics as an intro. Same resolution as the video of course. Try that maybe.

Wiggles · Mar 10, 2019

That's what I thought.
Cant get the videos to concatenate, just add an image for 10 seconds. 2 days later I wasn't left still wondering what just happened.
Don't get me wrong its a fabulous tool.
But click and drag it isn't.

AussieDollar · Mar 10, 2019

HoNeYBiRD said:
Do you need a video intro by all means? It wasn't yesterday when i played with this, but if i can remember well, it's a lot easier to use pics as an intro. Same resolution as the video of course. Try that maybe.

Spend couple days learning to create it. I don't mind learning something which is easily done. I'm just missing something rly simple

FFMPEG combining videos question

AussieDollar

Junior Member

Wiggles

Junior Member

BetterKnow

Senior Member

Wiggles

Junior Member

AussieDollar

Junior Member

Wiggles

Junior Member

HoNeYBiRD

Elite Member

Wiggles

Junior Member

AussieDollar

Junior Member

Main Menu

Marketplace

Making Money

BlackHat World