cross-fade

ffmpeg - make a seamless loop with a crossfade

由 ぐ巨炮叔叔 提交于 2021-02-18 16:08:34
问题 I want to apply a crossfade to the last x frames of a video with the first x frames in order to obtain a seamless loop. How can I do that? 回答1: Let's say your video is 30 seconds long and your fade is 1 second long. Your command would be ffmpeg -i video.mp4 -filter_complex "[0]split[body][pre]; [pre]trim=duration=1,format=yuva420p,fade=d=1:alpha=1,setpts=PTS+(28/TB)[jt]; [body]trim=1,setpts=PTS-STARTPTS[main]; [main][jt]overlay" output.mp4 The video is split into two identical streams. The

Cross fading several audio files using sox

由 a 夏天 提交于 2021-01-27 21:32:04
问题 I'm trying to cross-fade several audio files together with a 3 second cross-fade and join them together in to one file with sox. I can join several files together by the command below but not sure how to cross fade between each one: sox $(ls /tmp/a*.wav | sort -n) /tmp/out/out.wav I can cross fade two files with the commands below but not sure how to combine the first line that joins several files together with the second line that splices / cross fades sox 100hz.wav 440hz.wav out.wav splice

Merging multiple video files with ffmpeg and xfade filter

由 五迷三道 提交于 2021-01-01 07:00:30
问题 I need to merge multiple video files (with included audio) into a single video. I've noticed xfade has been recently released and used it but I am running into an audio sync issue. All videos are in the same format / resolution / fame and bitrate / etc both for video and audio. Here is what I am using to merge 5 videos of various durations with 0.5 crossfade transitions: ffmpeg \ -i v0.mp4 \ -i v1.mp4 \ -i v2.mp4 \ -i v3.mp4 \ -i v4.mp4 \ -filter_complex \ "[0][1]xfade=transition=fade

How to overlap and merge multiple audio files using ffmpeg?

由 北城以北 提交于 2019-12-31 05:36:09
问题 I am trying to merge multiple audio files into a single file but instead of concatenating which I can do using the following command: ffmpeg -v debug -i file1.wav -i file2.wav -i file3.wav -filter_complex [0:0]concat=n=3:v=0:a=1[out] -map [out] output.wav Though this command works fine for concatenating, I want to overlap let's say the last 100ms of the end of the first file and 100ms of the start of the next file. I am now trying to use 'acrossfade' filter that ffmpeg provides but I am not

How to use @keyframes for cross-fade gallery of images in css?

由 时间秒杀一切 提交于 2019-12-11 07:48:07
问题 I have a fiddle (Fiddle A) in which cross-fade gallery of images happen for 2 images (2 tiles). Here is the snippets of html/css which I have used. <div class="featured-block" style="display:flex; justify-content: center;"> <a href="https://www.google.com/" class="featured-block__item cf"> <div class="featured-block__item-inner"> <figure class="featured-block__image img-fit" itemprop="image" itemscope="" itemtype="http://schema.org/ImageObject"> <img class="default-opacity" src="https://i

Cycle through background images using fadeIn()

由 我们两清 提交于 2019-12-10 21:06:39
问题 I'm making a responsive website with some parallax images and the very first image is meant to be a cycling image, like an image slider. I am using jquery Cool kitten for its responsiveness. The related jquery plugins i have loaded are: <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script> <script type="text/javascript" src="js/jquery-ui.js"></script> The css for the div is: #slide2 { background-image:url(../images/darkmap.png); height:700px; } I have found that using HTML

ffmpeg convert a series of images to video - with crossfade or any other transition between every two frames

由 谁说胖子不能爱 提交于 2019-12-06 04:50:36
问题 I am currently able to convert a series of images to video, but I do also need to add transitions / animation in between them. String[] ffmpegCommand = {"/data/data/mypackage/app_bin/ffmpeg", "-y", "-qscale", "1", "-r", "" + framerate, "-i", "/data/data/mypackage/app_ipImg/image%3d.jpg", "-t", "" + (((total_images) * delay_of_each_frame_in_seconds) + 4), //"-s",heightwidth, "-vcodec", "libx264", "-s", "640x480", Environment.getExternalStorageDirectory() + "/photo_directory/myVideo.mp4"}; The

ffmpeg convert a series of images to video - with crossfade or any other transition between every two frames

由 做~自己de王妃 提交于 2019-12-04 11:21:22
I am currently able to convert a series of images to video, but I do also need to add transitions / animation in between them. String[] ffmpegCommand = {"/data/data/mypackage/app_bin/ffmpeg", "-y", "-qscale", "1", "-r", "" + framerate, "-i", "/data/data/mypackage/app_ipImg/image%3d.jpg", "-t", "" + (((total_images) * delay_of_each_frame_in_seconds) + 4), //"-s",heightwidth, "-vcodec", "libx264", "-s", "640x480", Environment.getExternalStorageDirectory() + "/photo_directory/myVideo.mp4"}; The above command is working for me to create video from image series But Now, I do want to add fade or

Crossfading 2 views using a button in Android

由 不羁的心 提交于 2019-12-04 06:47:37
问题 I am having some trouble using the android crossfading views. I'm trying to crossfade between 2 pictures back and forth. I can load the image, but once I hit the crossfade button, the app crashes. I tried following the code from the android site and modifying to fit my needs. I'm not quite sure if I have the XML file setup correctly to do the multiple views. I've tried the ImageViews inside of FrameLayout and without the FrameLayout also. Not sure how to set it up properly. Thanks for your

OnPageChangeListener alpha crossfading

由 筅森魡賤 提交于 2019-11-28 23:20:34
问题 There are a lot of questions with regard to crossfading in Android, but they all include animations. My question is about crossfading using the OnPageChangeListener of a ViewPager. I have a ViewPager which could have an unlimited number of views, but in practice uses about 6 or 7 views. Not much going on there. Each View in the ViewPager has a background Bitmap which should be fixed and crossfade with the background of the next (or previous) View instead of scrolling along with the rest of
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