Overlay first seconds of a video over the last seconds of the same video
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I'd like to do the following with ffmpeg :
Replace the last n seconds of a video with the first n seconds of this same video. Those first n seconds would have to appear fading in.
To clarify, if n = 2 :
- Take the first 2 seconds, remove them from the beginning of the video.
- Overlay those 2 seconds on the last 2 seconds of the video, fading in (fade in time would also be n.
I have tried this command :
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=00:02,setpts=PTS-STARTPTS[v0]; [0:v]trim=02:10,setpts=PTS-STARTPTS[v1]; [v0][v1]concat=n=2:v=1:a=0[out]" -map "[out]" output.mp4
which has absolutely no effect, output file is the same as my input file.
Any help ?
Thanks !
ffmpeg
asked Mar 12 at 14:03
michelmichel
1
add a comment |
I'd like to do the following with ffmpeg :
Replace the last n seconds of a video with the first n seconds of this same video. Those first n seconds would have to appear fading in.
To clarify, if n = 2 :
- Take the first 2 seconds, remove them from the beginning of the video.
- Overlay those 2 seconds on the last 2 seconds of the video, fading in (fade in time would also be n.
I have tried this command :
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=00:02,setpts=PTS-STARTPTS[v0]; [0:v]trim=02:10,setpts=PTS-STARTPTS[v1]; [v0][v1]concat=n=2:v=1:a=0[out]" -map "[out]" output.mp4
which has absolutely no effect, output file is the same as my input file.
Any help ?
Thanks !
ffmpeg
asked Mar 12 at 14:03
michelmichel
1
add a comment |
I'd like to do the following with ffmpeg :
Replace the last n seconds of a video with the first n seconds of this same video. Those first n seconds would have to appear fading in.
To clarify, if n = 2 :
- Take the first 2 seconds, remove them from the beginning of the video.
- Overlay those 2 seconds on the last 2 seconds of the video, fading in (fade in time would also be n.
I have tried this command :
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=00:02,setpts=PTS-STARTPTS[v0]; [0:v]trim=02:10,setpts=PTS-STARTPTS[v1]; [v0][v1]concat=n=2:v=1:a=0[out]" -map "[out]" output.mp4
which has absolutely no effect, output file is the same as my input file.
Any help ?
Thanks !
ffmpeg
asked Mar 12 at 14:03
michelmichel
1
I'd like to do the following with ffmpeg :
Replace the last n seconds of a video with the first n seconds of this same video. Those first n seconds would have to appear fading in.
To clarify, if n = 2 :
- Take the first 2 seconds, remove them from the beginning of the video.
- Overlay those 2 seconds on the last 2 seconds of the video, fading in (fade in time would also be n.
I have tried this command :
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=00:02,setpts=PTS-STARTPTS[v0]; [0:v]trim=02:10,setpts=PTS-STARTPTS[v1]; [v0][v1]concat=n=2:v=1:a=0[out]" -map "[out]" output.mp4
which has absolutely no effect, output file is the same as my input file.
Any help ?
Thanks !
ffmpeg
ffmpeg
asked Mar 12 at 14:03
michelmichel
1
asked Mar 12 at 14:03
michelmichel
1
asked Mar 12 at 14:03
michelmichel
1
asked Mar 12 at 14:03
michelmichel
1
asked Mar 12 at 14:03
michelmichel
1
1
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Use
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=0:n,setpts=PTS-STARTPTS,fade=st=0:d=n,format=yuva420p[v0]; [0:v]trim=n,format=yuva420p,colorchannelmixer=aa=0,setpts=PTS-STARTPTS[v1]; [v1][v0]concat=n=2:v=1:a=0[ol];[0:v]overlay,trim=n,setpts=PTS-STARTPTS[out]" -map "[out]" output.mp4
The first n seconds are extracted and have a fade applied and an opaque alpha channel added. The remainder of the video has a transparent alpha channel added. The first portion is appended to the 2nd one. This whole stream is then overlaid on the full original video stream. The portion of the overlay with transparent alpha is invisble so the base video shows through, but the last n seconds of the overlay, which is, in fact, the first n seconds the video but with fade applied, is overlaid on the last n seconds of the base video.
answered Mar 12 at 14:27
GyanGyan
15.9k21848
Why should the OP use this command? What does it do?
– Burgi
Mar 12 at 16:22
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review
– Burgi
Mar 12 at 16:22
@Burgi added explanation. It always provided an answer to the question.
– Gyan
Mar 12 at 17:23
add a comment |
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1 Answer
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oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Use
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=0:n,setpts=PTS-STARTPTS,fade=st=0:d=n,format=yuva420p[v0]; [0:v]trim=n,format=yuva420p,colorchannelmixer=aa=0,setpts=PTS-STARTPTS[v1]; [v1][v0]concat=n=2:v=1:a=0[ol];[0:v]overlay,trim=n,setpts=PTS-STARTPTS[out]" -map "[out]" output.mp4
The first n seconds are extracted and have a fade applied and an opaque alpha channel added. The remainder of the video has a transparent alpha channel added. The first portion is appended to the 2nd one. This whole stream is then overlaid on the full original video stream. The portion of the overlay with transparent alpha is invisble so the base video shows through, but the last n seconds of the overlay, which is, in fact, the first n seconds the video but with fade applied, is overlaid on the last n seconds of the base video.
answered Mar 12 at 14:27
GyanGyan
15.9k21848
Why should the OP use this command? What does it do?
– Burgi
Mar 12 at 16:22
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review
– Burgi
Mar 12 at 16:22
@Burgi added explanation. It always provided an answer to the question.
– Gyan
Mar 12 at 17:23
add a comment |
Use
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=0:n,setpts=PTS-STARTPTS,fade=st=0:d=n,format=yuva420p[v0]; [0:v]trim=n,format=yuva420p,colorchannelmixer=aa=0,setpts=PTS-STARTPTS[v1]; [v1][v0]concat=n=2:v=1:a=0[ol];[0:v]overlay,trim=n,setpts=PTS-STARTPTS[out]" -map "[out]" output.mp4
The first n seconds are extracted and have a fade applied and an opaque alpha channel added. The remainder of the video has a transparent alpha channel added. The first portion is appended to the 2nd one. This whole stream is then overlaid on the full original video stream. The portion of the overlay with transparent alpha is invisble so the base video shows through, but the last n seconds of the overlay, which is, in fact, the first n seconds the video but with fade applied, is overlaid on the last n seconds of the base video.
answered Mar 12 at 14:27
GyanGyan
15.9k21848
Why should the OP use this command? What does it do?
– Burgi
Mar 12 at 16:22
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review
– Burgi
Mar 12 at 16:22
@Burgi added explanation. It always provided an answer to the question.
– Gyan
Mar 12 at 17:23
add a comment |
Use
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=0:n,setpts=PTS-STARTPTS,fade=st=0:d=n,format=yuva420p[v0]; [0:v]trim=n,format=yuva420p,colorchannelmixer=aa=0,setpts=PTS-STARTPTS[v1]; [v1][v0]concat=n=2:v=1:a=0[ol];[0:v]overlay,trim=n,setpts=PTS-STARTPTS[out]" -map "[out]" output.mp4
The first n seconds are extracted and have a fade applied and an opaque alpha channel added. The remainder of the video has a transparent alpha channel added. The first portion is appended to the 2nd one. This whole stream is then overlaid on the full original video stream. The portion of the overlay with transparent alpha is invisble so the base video shows through, but the last n seconds of the overlay, which is, in fact, the first n seconds the video but with fade applied, is overlaid on the last n seconds of the base video.
answered Mar 12 at 14:27
GyanGyan
15.9k21848
Use
ffmpeg -i media.mp4 -filter_complex "[0:v]trim=0:n,setpts=PTS-STARTPTS,fade=st=0:d=n,format=yuva420p[v0]; [0:v]trim=n,format=yuva420p,colorchannelmixer=aa=0,setpts=PTS-STARTPTS[v1]; [v1][v0]concat=n=2:v=1:a=0[ol];[0:v]overlay,trim=n,setpts=PTS-STARTPTS[out]" -map "[out]" output.mp4
The first n seconds are extracted and have a fade applied and an opaque alpha channel added. The remainder of the video has a transparent alpha channel added. The first portion is appended to the 2nd one. This whole stream is then overlaid on the full original video stream. The portion of the overlay with transparent alpha is invisble so the base video shows through, but the last n seconds of the overlay, which is, in fact, the first n seconds the video but with fade applied, is overlaid on the last n seconds of the base video.
answered Mar 12 at 14:27
GyanGyan
15.9k21848
edited Mar 12 at 17:16
answered Mar 12 at 14:27
GyanGyan
15.9k21848
answered Mar 12 at 14:27
GyanGyan
15.9k21848
answered Mar 12 at 14:27
GyanGyan
15.9k21848
15.9k21848
Why should the OP use this command? What does it do?
– Burgi
Mar 12 at 16:22
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review
– Burgi
Mar 12 at 16:22
@Burgi added explanation. It always provided an answer to the question.
– Gyan
Mar 12 at 17:23
add a comment |
Why should the OP use this command? What does it do?
– Burgi
Mar 12 at 16:22
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review
– Burgi
Mar 12 at 16:22
@Burgi added explanation. It always provided an answer to the question.
– Gyan
Mar 12 at 17:23
Why should the OP use this command? What does it do?
– Burgi
Mar 12 at 16:22
Why should the OP use this command? What does it do?
– Burgi
Mar 12 at 16:22
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review
– Burgi
Mar 12 at 16:22
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review
– Burgi
Mar 12 at 16:22
@Burgi added explanation. It always provided an answer to the question.
– Gyan
Mar 12 at 17:23
@Burgi added explanation. It always provided an answer to the question.
– Gyan
Mar 12 at 17:23
add a comment |
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