ffmpeg -i v.3gp -acodec copy -vf "movie=w.png [logo]; [in][logo] overlay=10:main_h-overlay_h-10 [out]" nv.3gp
It work's fine, but i want watermark only first 30 seconds.
Any ideas?
You can convert the logo into a 30 second video with png codec and alpha channel, and apply the video as overlay.
The duration of the logo video should be specified through the number of frames at the frame rate of the main video (in your case, v.3pg). For example, for 30 fps main video run:
ffmpeg.exe -loop 1 -i w.png -vframes 901 -vf "fade=out:899:1:alpha=1"
-vcodec png -pix_fmt rgba w.mov
The logo needs to be faded out; otherwise it will not disappear. Then use the logo video as overlay on another video:
ffmpeg -i v.3gp -acodec copy -vf "movie=w.mov [logo]; [in][logo]
overlay=10:main_h-overlay_h-10 [out]" nv.3gp
Alternatively, rather then ending abruptly, the logo can be faded out gradually, e.g. within 30 frames using -vf "fade=out:870:30:alpha=1".
overlay filter supports timeline editing; you can simply read from a png file and then overlay=enable='lte(t,30)':...
Realize it's late, but as I was looking at a similar problem I managed to solve this one.
It fades in with 0.5 sec from start, then fades out at 30 sec
ffmpeg \
-i v.3gp \
-loop 1 -i w.png \
-acodec copy \
-filter_complex \
"[1:v] fade=in:st=0:d=0.5,fade=out:st=30:d=0.5 [logo]; [0:v][logo] overlay=10:main_h-overlay_h-10" \
nv.3gp
You may cut the first 30 seconds, apply watermark to it, then join it with the remaining part.
Related
I am adding an animated gif as an overlay to a video with a command like this:
ffmpeg -y -i video.mp4 -i overlay.gif -filter_complex "[0:v][1:v] overlay=38:11:enable='between(t,1.35,15.042000)'" -pix_fmt yuv420p -c:a copy -safe 0 output.mp4
In that command I'm asking it to show the gif from 1.35 to 15, and that works insofar as the overlay is only shown between those times, but it's as if the animation starts before it reaches 1.35, because the bit of the animation before that point doesn't ever appear on the screen. The start of the animation is missing from the final video.
Tried in ffmpeg-20180925-a7429d8 and ffmpeg-N-100581-ga454a0c14f
Typically, I find the answer after posting:
https://dev.to/oskarahl/ffmpeg-overlay-a-video-on-a-video-after-x-seconds-4fc9
Solution:
Use the setpts filter to delay the overlay video (gif.mp4) start with x seconds.
ffmpeg -i main_video.mp4 -i gif.mp4 -filter_complex
“[1:v]setpts=PTS-STARTPTS+1/TB[delayedGif];
[0:v][delayedGif]overlay=enable='between(t,1,3)'[out]”
-map [out] complete.mp4
The setpts filter evaluates its expression and assigns the value as the timestamp for the current frame it is processing.
I want to convert images to video which works fine with ffmpeg but i need to add ken burns effect to every images.
the code i was to get only only works on the last and first images (the effect i mean).
ffmpeg -y -i %d.jpg -t 25 -pix_fmt yuv420p -vf zoompan=z='zoom+0.001':s=1280x800,scale=hd1080 -c:v libx264 -preset fast -crf 22 -t 300 -threads 2 zoomout.mp4
SOLVED
the problem is from the images, so i used new set of images
I have an mp4 that I want to overlay on top of a jpeg. The command I'm using is:
Ffmpeg -y -i background.jpg -i video.mp4 -filter_complex "overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2" -codec:a copy output.mp4
But for some reason, the output is 0 second long but the thumbnail does show the first frame of the video centred on the image properly.
I have tried using -t 4 to set the output's length to 4 seconds but that does not work.
I am doing this on windows.
You need to loop the image. Since it loops indefinitely you then must use the shortest option in overlay so it ends when video.mp4 ends.
ffmpeg -loop 1 -i background.jpg -i video.mp4 -filter_complex \
"overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2:shortest=1" \
-codec:a copy -movflags +faststart output.mp4
See overlay documentation for more info.
Well you should loop the image until the video duration. So to do the you need to add -loop 1 before the input image. Then the image will have a infinite duration. So to control it specify -shortest before the output file which will trim all the streams to the shortest duration among them. Else you can use -t to trim the image duration to the video length. This will do what you want.
Hope this helps!
trying to get my head around ffmpeg to create a slideshow where each image is displayed for ~5 seconds with some audio. created a bat file to run the following so far:
ffmpeg -f image2 -i image-%%03d.jpg -i music.mp3 output.mpg
It gets the images and displayes them all very fast in the first second of the video, it then plays out the rest of the audio while showing the last image.
I want to make the images stay up longer (about 5 seconds), and stop the video after the last frame (not playing the rest of the song), are either of these things possible? i could hack the frame rate thing i guess by having hundreds of the same image in order to keep it up longer, but this is far from ideal!
Thanks
The default encoder for mpg output, mpeg1video, is strict about the allowed frame rates, so an input and an output -r are required:
ffmpeg -r 1/5 -i image-%03d.jpg -i music.mp3 -r 25 -qscale:v 2 -shortest -codec:a copy output.mpg
The input images will have a frame rate of 1 frame every 5 seconds and the output will duplicate frames to reach 25 frames per second.
-f image2 is generally not required.
-qscale:v can control output quality. A sane range is 2-5.
-shortest will make the output duration the same as the shortest input duration.
-codec:a copy copy your MP3 audio instead of re-encoding.
MPEG-1 video has more modern alternatives. See the FFmpeg and x264 Encoding Guide for more info.
Also see:
* FFmpeg FAQ: How do I encode single pictures into movies?
* FFmpeg Wiki: Create a video slideshow from images
You could use the filter fps instead of output framerate
ffmpeg -r 1/5 -i img%03d.png -i musicfile -c:v libx264 -vf fps=25 -pix_fmt yuv420p out.mp4
This however skips the last image for me strangely.
Need to add watermark for first 3 seconds the video using ffmpeg. Here's what I got right now:
ffmpeg -y -i '255871.mov' -qscale:v 0 -qscale:a 0 -vf '[in] transpose=1 [out];movie=watermark.png , select=lte(t\,3) [bg]; [out][bg] overlay=x=20:y=main_h-60 [out]' output.mp4
It rotates video to the right and adds watermark at the bottom of the video for first 3 seconds. The problem is watermark is visible during the whole video.
Thought that select doesn't work at all. Tried following command
ffmpeg -y -i '255871.mov' -qscale:v 0 -qscale:a 0 -vf '[in] transpose=1 [out];movie=watermark.png , select=0 [bg]; [out][bg] overlay=x=20:y=main_h-60 [out]' output.mp4
Watermark is not visible. This is correct and proves that select filter works as expected. As I understand this is how ffmpeg works: it leaves last frame of the shortest video visible.
How can I force ffmpeg to discard show watermark after N seconds?
Have to answer it myself. ffmpeg mailing list helped me to solve the issue.
The main idea is to convert existing watermark into video using Apple Animation codec (it supports transparency) and fade out last frame of created video using fade filter.
Example:
ffmpeg -loop 1 -i watermark.png -t 3 -c qtrle -vf 'fade=out:73:1:alpha=1' watermark.mov
ffmpeg -y -i '255871.mov' -qscale:v 0 -qscale:a 0 -vf '[in] transpose=1 [out];movie=watermark.mov [bg]; [out][bg] overlay=x=20:y=main_h-60 [out]' output.mp4
Fade out is required because ffmpeg uses last frame of overlaid video for the rest of the video. This filter makes last frame fully transparent via alpha=1 parameter. In fact it should be fade=out:74:1:alpha=1, but it didn't work for me, don't know why