ffmpeg-go
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u2takey
Concat + Audio missing.
@u2takey For some reason, the audio is getting lost during concat.
I tried the example you mentioned here and lost the audio completely on the concat.mp4 even though I had perfect audio on the two files.
Here is my version of the code, still the audio is not working - note the Video is completely fine:
// Lets concate everything.
finalFiles := []*ffmpeg.Stream{}
for _, file := range listFiles() {
finalFiles = append(finalFiles, ffmpeg.Input(file.Name()))
}
ffmpeg.Concat(finalFiles).
Output("w_final.mp4").
OverWriteOutput().
ErrorToStdOut().
Run()
If I modify the command output (by adding :a=1) & execute on command line it works perfectly fine:
ffmpeg -i ./w_one.mp4 -i ./w_two.mp4 -i ./w_three.mp4 -filter_complex "[0][1][2]concat=n=3[s0]" -map "[s0]" ./concat.mp4 -y
to
ffmpeg -i ./w_one.mp4 -i ./w_two.mp4 -i ./w_three.mp4 -filter_complex "[0][1][2]concat=n=3:a=1[s0]" -map "[s0]" ./concat.mp4 -y
Please let me know where to add these parameter to make it work? Though I tried this below and it doesn't work, instead it throws an error
ffmpeg.Concat(finalFiles, ffmpeg.KwArgs{"a": "1"}).
Error:
panic: interface conversion: interface {} is string, not int
goroutine 1 [running]:
github.com/u2takey/ffmpeg-go.Concat({0x140000d2ea0, 0x3, 0x4}, {0x1400019fdf0, 0x1, 0x100e84ee8?})
/Users/kishore/go/pkg/mod/github.com/u2takey/[email protected]/filters.go:108 +0x2d0
main.main()
/Users/kishore/proj/github.com/kishorevaishnav/hotbrain/main.go:120 +0x158
exit status 2
