FFmpeg: Masking webcam while recording
I hope you're all having a great day.
I'm trying to record a webcam that is shaped as a rounded-rectangular on the top-right of the screen.
I'm using this mask
The shape of the webcam in the video is actually the same as the mask but the problem is that it can only record the first frame then the webcam freezes until the end of the video.
ffmpeg -f gdigrab -s 1360x768 -framerate 30 -i desktop
-f dshow -i video="webcam-device":audio="audio-input-device"
-filter_complex "movie='roundedrectangle.png',alphaextract[a];[1:v][a]alphamerge,scale=256:-1[cutout];[0:v][cutout]overlay=10:10,split=2[output0][output1]"
-map 1:a -c:a aac -map "[output0]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output0.mp4
-map 1:a -c:a aac -map "[output1]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output1.mp4
Expected output: Two videos with sound that got a rounded-rectangular webcam on the top left of the screen.
Thank you so much.
ffmpeg mask
asked Dec 11 '18 at 15:18
Sano
73
add a comment |
I hope you're all having a great day.
I'm trying to record a webcam that is shaped as a rounded-rectangular on the top-right of the screen.
I'm using this mask
The shape of the webcam in the video is actually the same as the mask but the problem is that it can only record the first frame then the webcam freezes until the end of the video.
ffmpeg -f gdigrab -s 1360x768 -framerate 30 -i desktop
-f dshow -i video="webcam-device":audio="audio-input-device"
-filter_complex "movie='roundedrectangle.png',alphaextract[a];[1:v][a]alphamerge,scale=256:-1[cutout];[0:v][cutout]overlay=10:10,split=2[output0][output1]"
-map 1:a -c:a aac -map "[output0]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output0.mp4
-map 1:a -c:a aac -map "[output1]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output1.mp4
Expected output: Two videos with sound that got a rounded-rectangular webcam on the top left of the screen.
Thank you so much.
ffmpeg mask
asked Dec 11 '18 at 15:18
Sano
73
add a comment |
I hope you're all having a great day.
I'm trying to record a webcam that is shaped as a rounded-rectangular on the top-right of the screen.
I'm using this mask
The shape of the webcam in the video is actually the same as the mask but the problem is that it can only record the first frame then the webcam freezes until the end of the video.
ffmpeg -f gdigrab -s 1360x768 -framerate 30 -i desktop
-f dshow -i video="webcam-device":audio="audio-input-device"
-filter_complex "movie='roundedrectangle.png',alphaextract[a];[1:v][a]alphamerge,scale=256:-1[cutout];[0:v][cutout]overlay=10:10,split=2[output0][output1]"
-map 1:a -c:a aac -map "[output0]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output0.mp4
-map 1:a -c:a aac -map "[output1]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output1.mp4
Expected output: Two videos with sound that got a rounded-rectangular webcam on the top left of the screen.
Thank you so much.
ffmpeg mask
asked Dec 11 '18 at 15:18
Sano
73
I hope you're all having a great day.
I'm trying to record a webcam that is shaped as a rounded-rectangular on the top-right of the screen.
I'm using this mask
The shape of the webcam in the video is actually the same as the mask but the problem is that it can only record the first frame then the webcam freezes until the end of the video.
ffmpeg -f gdigrab -s 1360x768 -framerate 30 -i desktop
-f dshow -i video="webcam-device":audio="audio-input-device"
-filter_complex "movie='roundedrectangle.png',alphaextract[a];[1:v][a]alphamerge,scale=256:-1[cutout];[0:v][cutout]overlay=10:10,split=2[output0][output1]"
-map 1:a -c:a aac -map "[output0]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output0.mp4
-map 1:a -c:a aac -map "[output1]" -c:v libx264 -b:v 2M -preset fast -s 1280x720 -f mp4 output1.mp4
Expected output: Two videos with sound that got a rounded-rectangular webcam on the top left of the screen.
Thank you so much.
ffmpeg mask
ffmpeg mask
asked Dec 11 '18 at 15:18
Sano
73
asked Dec 11 '18 at 15:18
Sano
73
asked Dec 11 '18 at 15:18
Sano
73
asked Dec 11 '18 at 15:18
Sano
73
asked Dec 11 '18 at 15:18
Sano
73
73
add a comment |
add a comment |
1 Answer
1
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oldest
votes
alphamerge terminates with the shortest input and your 2nd input is a single frame. So you need to loop it.
movie='roundedrectangle.png':loop=0,alphaextract[a];
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
Good lord this is the third time you help me out, I'm feeling embarrassed :') Thank you so much
– Sano
Dec 12 '18 at 9:01
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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oldest
votes
alphamerge terminates with the shortest input and your 2nd input is a single frame. So you need to loop it.
movie='roundedrectangle.png':loop=0,alphaextract[a];
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
Good lord this is the third time you help me out, I'm feeling embarrassed :') Thank you so much
– Sano
Dec 12 '18 at 9:01
add a comment |
alphamerge terminates with the shortest input and your 2nd input is a single frame. So you need to loop it.
movie='roundedrectangle.png':loop=0,alphaextract[a];
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
Good lord this is the third time you help me out, I'm feeling embarrassed :') Thank you so much
– Sano
Dec 12 '18 at 9:01
add a comment |
alphamerge terminates with the shortest input and your 2nd input is a single frame. So you need to loop it.
movie='roundedrectangle.png':loop=0,alphaextract[a];
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
alphamerge terminates with the shortest input and your 2nd input is a single frame. So you need to loop it.
movie='roundedrectangle.png':loop=0,alphaextract[a];
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
answered Dec 11 '18 at 17:05
Gyan
14.5k21745
14.5k21745
Good lord this is the third time you help me out, I'm feeling embarrassed :') Thank you so much
– Sano
Dec 12 '18 at 9:01
add a comment |
Good lord this is the third time you help me out, I'm feeling embarrassed :') Thank you so much
– Sano
Dec 12 '18 at 9:01
Good lord this is the third time you help me out, I'm feeling embarrassed :') Thank you so much
– Sano
Dec 12 '18 at 9:01
Good lord this is the third time you help me out, I'm feeling embarrassed :') Thank you so much
– Sano
Dec 12 '18 at 9:01
add a comment |
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