Help with creating MP4 video with multiple audio tracks

[FFmpeg-users mailing list]

Hello,

I’m new to this, so I apologize if I’m missing something trivial. I need to create an .mp4 video output with multiple audio tracks in it. I run the command:

ffmpeg -i sample-mp4-file.mp4 -i hindi.aac -i tamil.aac -i telugu.aac -map 1 -map 2 -map 3 -metadata:s:a:0 language=eng -metadata:s:a:1 language=tam -metadata:s:a:2 language=tel -metadata:s:a:3 language=hin -codec copy multilanguage.mp4

However, the output includes only the multiple audio tracks with no video (0 kB) – see my  output results <https://i.stack.imgur.com/ejXrL.png>.

What am I doing wrong? Why am I always getting export missing the video? So far, I tried various .mp4 video files, and also MP3 format for audio tracks.

Any kind of help would be much appreciated.

Thank you.

Best regards,

Chiara

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[Nicolas George]

Chiara via ffmpeg-user (12021-01-18):

> I’m new to this, so I apologize if I’m missing something trivial. I
> need to create an .mp4 video output with multiple audio tracks in it.
> I run the command:
>
> ffmpeg -i sample-mp4-file.mp4 -i hindi.aac -i tamil.aac -i telugu.aac
> -map 1 -map 2 -map 3 -metadata:s:a:0 language=eng -metadata:s:a:1
> language=tam -metadata:s:a:2 language=tel -metadata:s:a:3 language=hin
> -codec copy multilanguage.mp4
>
> However, the output includes only the multiple audio tracks with no
> video (0 kB)

You have not mapped the video file.

Regards,

--
  Nicolas George
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[FFmpeg-users mailing list]

Hi Nicolas,

Of course! Thank you very much, it works now.

Cheers,
Chiara

-

Chiara Rendeková

Marketing Assistant

[phone] [hidden email]

Foliovision s.r.o. | Strelecká 2 - 81101 Bratislava - Slovakia

> Dňa 18. 1. 2021 o 8:41, Nicolas George <[hidden email]> napísal:
>
> Chiara via ffmpeg-user (12021-01-18):
>> I’m new to this, so I apologize if I’m missing something trivial. I
>> need to create an .mp4 video output with multiple audio tracks in it.
>> I run the command:
>>
>> ffmpeg -i sample-mp4-file.mp4 -i hindi.aac -i tamil.aac -i telugu.aac
>> -map 1 -map 2 -map 3 -metadata:s:a:0 language=eng -metadata:s:a:1
>> language=tam -metadata:s:a:2 language=tel -metadata:s:a:3 language=hin
>> -codec copy multilanguage.mp4
>>
>> However, the output includes only the multiple audio tracks with no
>> video (0 kB)
>
> You have not mapped the video file.
>
> Regards,
>
> --
>  Nicolas George
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".

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