How to add video audio to another video with no audio? (without conversion)

[aaajan]

Hi Everyone

I want to add video audio to another video with no audio but without conversion or losing quality, if it is possible.

Both videos have the same format (mp4).

Thank you !

[butterw]

ffmpeg -i "video.mp4" -i "audio.mp4" -c copy -map 0:v -map 1:a "out.mp4"

[aaajan]

ffmpeg -i "video.mp4" -i "audio.mp4" -c copy -map 0:v -map 1:a "out.mp4"

Thank you for your answer !

Does this process need conversion/changing quality or "out.mp4" is the copy of "video.mp4" merged with the audio of "audio.mp4" ?

[poisondeathray]

ffmpeg -i "video.mp4" -i "audio.mp4" -c copy -map 0:v -map 1:a "out.mp4"

Does this process need conversion/changing quality

No

or "out.mp4" is the copy of "video.mp4" merged with the audio of "audio.mp4" ?

Yes

[ProWo]

Does this process need conversion/changing quality or "out.mp4" is the copy of "video.mp4" merged with the audio of "audio.mp4" ?

No, this is a pure remux.

If you prefer to use a GUI instead of a command line, you can try my clever FFmpeg GUI.
Load your video file without audio, wait for the analysis, click Main, click Multiplex, the videostream is already selected, click Audio stream, select your audio file (this can be a video WITH audio or a pure audio file), click Target File, accept the suggested name, select the audio language, the container (mkv or mp4) and the desired aspect ratio. Click Mutiplex, done.

[aaajan]

Perfect ! Thank you Everyone !

[aaajan]

ffmpeg -i "video.mp4" -i "audio.mp4" -c copy -map 0:v -map 1:a "out.mp4"

If I understood, "video.mp4" and "audio.mp4" should be in the same folder of ffmpeg.exe "bin" ?

For "out.mp4" , Should I leave the name "out" as is or I can write any name ?

[butterw]

You can change all the names/filepaths, only the output extension is important.
If it isn't available on the Path, you can copy ffmpeg.exe to your work folder.

https://forum.videohelp.com/threads/398507-Top10-Commands-for-Lossless-Video-manipulat...eg-%28Guide%29

[aaajan]

You can change all the names/filepaths, only the output extension is important.
If it isn't available on the Path, you can copy ffmpeg.exe to your work folder.

https://forum.videohelp.com/threads/398507-Top10-Commands-for-Lossless-Video-manipulat...eg-%28Guide%29

Perfect ! Thank you again !

[aaajan]

You can change all the names/filepaths, only the output extension is important.
If it isn't available on the Path, you can copy ffmpeg.exe to your work folder.

https://forum.videohelp.com/threads/398507-Top10-Commands-for-Lossless-Video-manipulat...eg-%28Guide%29

Sorry, I have last questions. If I understood, only ffmpeg.exe are important in the whole folder when editing video ? (even for cut on keyframes)

I mean "doc" , "presets" folders and other files won't play any role in video editing process ?

Does ffmpeg.exe work well on mkv files when it comes to cut on keyframes ?

[butterw]

Sorry, I have last questions. If I understood, only ffmpeg.exe are important in the whole folder when editing video ? (even for cut on keyframes)

I mean "doc" , "presets" folders and other files won't play any role in video editing process ?

Correct.

Does ffmpeg.exe work well on mkv files when it comes to cut on keyframes ?

Sure. Though you could also use mkvmerge/mkvtoolnix in this case.

[aaajan]

Sorry, I have last questions. If I understood, only ffmpeg.exe are important in the whole folder when editing video ? (even for cut on keyframes)

I mean "doc" , "presets" folders and other files won't play any role in video editing process ?

Correct.

Does ffmpeg.exe work well on mkv files when it comes to cut on keyframes ?

Sure. Though you could also use mkvmerge/mkvtoolnix in this case.

Perfect ! Thank you very much !

[aaajan]

There is something I want to be sure of.

On the download page https://www.videohelp.com/software/ffmpeg , there are various versions until the last one (ffmpeg 4.3.2) ,

which version do you recommend me if I use Windows 10 x64 ?

[butterw]

Latest stable release should do fine.

[aaajan]

Latest stable release should do fine.

OK. Thank you very much !