Audio not hearing in output file while Concatenation two files,

[elavarasanJargon]

Hi guys,

I am trying to concatenate two files for one video file. For that, it's working fine and i got output video file. But i can't hearing audio on output video file. It's issue please anyone help me.

Here is tested command,

../ffmpeg
-i video1.mp4
-i video2.mp4
-y -filter_complex "
[0:v]split[v000][v010];
[1:v]split[v100][v110];
[v000]trim=0:39[v001];
[v010]trim=39:40[v011t];
[v011t]setpts=PTS-STARTPTS[v011];
[v100]trim=0:4[v101];
[v110]trim=4:5[v112t];
[v112t]setpts=PTS-STARTPTS[v112];
[v011][v101]gltransition=duration=1:source=/home/procserverjh/opengl/gl-transitions-master/transitions/crosswarp.glsl[vt0];
[v001][vt0][v112]concat=n=3[outv];[0:a][1:a]amix=inputs=2[ad]"
-map "[outv]" -map "[ad]?" -vcodec h264_nvenc -acodec aac -strict experimental -ac 2 -ar 44100 -ab 128k
output.mp4

Thanks,
R.Elavarasan

[vishnupradeep97]

You need to use adelay filter to delay the audio of the second video and then use an amix filter to mix audios and use that as audio for your video.