It might be a duplicate question but didn't find any helpful answer.
I have 2 audio files and 1 mp4 video file. Want to add the 2 audio files to mp4 videoat specific time.
For example:
Video file:
input.mp4 (2 minutes video)Audio files:
Audio File 1:
test_0:01.mp3 (15 seconds audio file) I want to insert this file at position 0:01 in the mp4 videoAudio File 2:
test_0:20.mp3(15 seconds audio file) I want to insert this file at position 0:20 in the mp4 videoI tried the following command with offset
It's only inserting test_0:01.mp3 at 0:01 position in the video file
But test_0:20.mp3 is not getting inserted at 0:020 position getting mute for this file no audio.
ffmpeg -i input.mp4 -itsoffset 01 -i test_0:01.mp3 -itsoffset 20 -i test_0:20.mp3 -c:v copy -map 0:v:0 -map 1:a -map 2:a -c:a aac -b:a 192k output.mp4
Any help will be appreciated!
Your command creates two audio tracks in the MP4 file. If you have a look in your video player you can choose between two audio tracks (usually used to choose different audio languages).
This is because every -map parameter creates a new stream. In your example one video with two audio tracks.
Use the audio filter amix instead. Use also the filter adelay for the delay in the same filter chain to achieve the best result.
ffmpeg -i input.mp4 -i test_0:01.mp3 -i test_0:20.mp3 -filter_complex "[1:a]adelay=1s:all=1[a1];[2:a]adelay=20s:all=1[a2];[a1][a2]amix=inputs=2[amixout]" -map 0:v:0 -map "[amixout]" -c:v copy -c:a aac -b:a 192k output.mp4