Simple FFmpeg Batch File Command

[Axel Slingerland]

Greetings from the Lost Coast of Northern California,

I have a number of videos I recorded while on vacation, and a lot of old recordings I think would make perfect soundtracks for them.

Can someone tell me how to write a simple batch file for this?

ffmpeg -i video.mp4 -i audio.aac -c:v copy -c:a copy c_1.mp4

Any assistance would be greatly appreciated.

Ax

[videobruger]

Perhaps you could clarify your naming convention a bit more (video.mp4, audio.acc) an whether you want to keep the audio track from video.mp4 (giving two audio tracks in c_1.mp4) or not.

[Axel Slingerland]

Sorry... I didn't think of that. The .mp4 files were originally .mov files from my camera, that the audio was recorded with the video, but was just the voices of my family. I converted them to .mp4 files and would like to drop the original audio and replace it with music I recorded.

[jagabo]

ffmpeg -i video.mp4 -i audio.aac -c:v copy -c:a copy -map 0:v -map 1:a c_1.mp4

-map 0:v means take the video from the first input
-map 1:a means take the audio from the second input

[Axel Slingerland]

Thanks! That explains something I didn't even realize I needed. Any suggestions on how to write the command into a batch file?

[jagabo]

If your audio and video have the same base name (My Movie.mp4, My Movie.aac), to remux all file pairs in a folder:

md New
for %%F in (*.mp4) do ( 
    ffmpeg -i "%%~nF.mp4" -i "%%~nF.aac" -c:v copy -c:a copy -map 0:v -map 1:a "New\%%~nxF"
)
pause

The new files will have the same name as the video mp4 file but in a sub folder called New.

[Axel Slingerland]

Thanks again! It works like a charm. I had a feeling it would, because after looking around the forum and reading many posts looking for an answer before I posted my question (I know, I'm a rarity in that department) I was hoping you would reply. Kudos to you!