Add audio or video track if not present in input with ffmpeg
Using ffmpeg 4.1 on windows 7, I am trying to add null audio or empty video track if input file doesn't have it. I don't know how to use anullsrc/aevalsrc. I looked a lot and found that i have to provide the duration as well with anullsrc.
In my case, input files are in webm format which may contain both audio and video track or one of them. So, whatever track is missing that i want to add till the end.
I am new to ffmpeg. Please help.
Thanks,
R.
ffmpeg
asked Jan 26 at 17:27
RudreshRudresh
1
add a comment |
Using ffmpeg 4.1 on windows 7, I am trying to add null audio or empty video track if input file doesn't have it. I don't know how to use anullsrc/aevalsrc. I looked a lot and found that i have to provide the duration as well with anullsrc.
In my case, input files are in webm format which may contain both audio and video track or one of them. So, whatever track is missing that i want to add till the end.
I am new to ffmpeg. Please help.
Thanks,
R.
ffmpeg
asked Jan 26 at 17:27
RudreshRudresh
1
add a comment |
Using ffmpeg 4.1 on windows 7, I am trying to add null audio or empty video track if input file doesn't have it. I don't know how to use anullsrc/aevalsrc. I looked a lot and found that i have to provide the duration as well with anullsrc.
In my case, input files are in webm format which may contain both audio and video track or one of them. So, whatever track is missing that i want to add till the end.
I am new to ffmpeg. Please help.
Thanks,
R.
ffmpeg
asked Jan 26 at 17:27
RudreshRudresh
1
Using ffmpeg 4.1 on windows 7, I am trying to add null audio or empty video track if input file doesn't have it. I don't know how to use anullsrc/aevalsrc. I looked a lot and found that i have to provide the duration as well with anullsrc.
In my case, input files are in webm format which may contain both audio and video track or one of them. So, whatever track is missing that i want to add till the end.
I am new to ffmpeg. Please help.
Thanks,
R.
ffmpeg
ffmpeg
asked Jan 26 at 17:27
RudreshRudresh
1
asked Jan 26 at 17:27
RudreshRudresh
1
asked Jan 26 at 17:27
RudreshRudresh
1
asked Jan 26 at 17:27
RudreshRudresh
1
asked Jan 26 at 17:27
RudreshRudresh
1
1
add a comment |
add a comment |
1 Answer
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If you have to do this for many files, first create a dummy video and audio file.
ffmpeg -f lavfi -i color -f lavfi -i anullsrc -ac 1 -ar 8000 -t 5 dummy.webm
Now, you can make use of ffmpeg's automatic stream selection and -shortest option
ffmpeg -i input.webm -stream_loop -1 -i dummy.webm -c copy -shortest av.webm
answered Jan 26 at 18:15
GyanGyan
15.2k21845
add a comment |
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1 Answer
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1 Answer
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If you have to do this for many files, first create a dummy video and audio file.
ffmpeg -f lavfi -i color -f lavfi -i anullsrc -ac 1 -ar 8000 -t 5 dummy.webm
Now, you can make use of ffmpeg's automatic stream selection and -shortest option
ffmpeg -i input.webm -stream_loop -1 -i dummy.webm -c copy -shortest av.webm
answered Jan 26 at 18:15
GyanGyan
15.2k21845
add a comment |
If you have to do this for many files, first create a dummy video and audio file.
ffmpeg -f lavfi -i color -f lavfi -i anullsrc -ac 1 -ar 8000 -t 5 dummy.webm
Now, you can make use of ffmpeg's automatic stream selection and -shortest option
ffmpeg -i input.webm -stream_loop -1 -i dummy.webm -c copy -shortest av.webm
answered Jan 26 at 18:15
GyanGyan
15.2k21845
add a comment |
If you have to do this for many files, first create a dummy video and audio file.
ffmpeg -f lavfi -i color -f lavfi -i anullsrc -ac 1 -ar 8000 -t 5 dummy.webm
Now, you can make use of ffmpeg's automatic stream selection and -shortest option
ffmpeg -i input.webm -stream_loop -1 -i dummy.webm -c copy -shortest av.webm
answered Jan 26 at 18:15
GyanGyan
15.2k21845
If you have to do this for many files, first create a dummy video and audio file.
ffmpeg -f lavfi -i color -f lavfi -i anullsrc -ac 1 -ar 8000 -t 5 dummy.webm
Now, you can make use of ffmpeg's automatic stream selection and -shortest option
ffmpeg -i input.webm -stream_loop -1 -i dummy.webm -c copy -shortest av.webm
answered Jan 26 at 18:15
GyanGyan
15.2k21845
answered Jan 26 at 18:15
GyanGyan
15.2k21845
answered Jan 26 at 18:15
GyanGyan
15.2k21845
answered Jan 26 at 18:15
GyanGyan
15.2k21845
15.2k21845
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