video

问题 Using following code, I'm able to trim video by time: ffmpeg -i input.mp4 -filter_complex \ "[0:v]trim=60:65,setpts=PTS-STARTPTS[v0]; \ [0:a]atrim=60:65,asetpts=PTS-STARTPTS[a0]; \ [0:v]trim=120:125,setpts=PTS-STARTPTS[v1]; [0:a]atrim=120:125,asetpts=PTS-STARTPTS[a1]; \ [v0][a0][v1][a1]concat=n=2:v=1:a=1[out]" \ -map "[out]" output.mp4 Above code trim video from 60-65 sec & 120-125sec then concatenate in output.mp4 file. Need to know how to trim video by using frame number and concatenate. Is

问题 I'm trying to upload a video from my ReactJS application to Vimeo but I'm getting a "No user credentials were provided." error (8003). I followed this guide from the Vimeo API: https://developer.vimeo.com/api/upload/videos#form-approach My code (for the first step of uploading a video): const accessToken = "74a218e620507395c78219ab9421639c"; const size = form.file.size; // size of video in bytes axios .post("https://api.vimeo.com/me/videos", { headers: { Accept: "application/vnd.vimeo.*+json

问题 I have a problem with the output of AVFrame (AVPicture) into the ANativeWindow. I wrote simpe test code: void *Player::readThread(void * reserved) { ALOGD("Read thread started!"); VideoState *state = (VideoState *) reserved; int err = 0; int ret; int i; AVFormatContext *formatContext = NULL; AVCodecContext *codecContext = NULL; AVCodecParameters *codecParams = NULL; AVCodecID codecID = AV_CODEC_ID_NONE; AVCodec *decoder = NULL; AVFrame *frame = NULL; AVFrame *frameRGBA = NULL; AVPacket packet

问题 I have 10 trials and two conditions (randomized across the trials) that consist of playing either an optic flow mp4 movie or a random flow mp4 movie. To load and play the mp4 I used visual.MovieStim3 nBlocks = 4 nTrials = 10 nb_conditions = np.arange(1,3) # We have two conditions : condition 1 is Optic flow and condition 2 is Random flow conditions = nb_conditions.repeat(nTrials/2) # 5 times condition1 and 5 times condition2 conditions_rand = np.random.permutation(nb_conditions) # Randomize

问题 I'm attempting to do a proof of concept by downloading a TV episode of Bob's Burgers at https://www.watchcartoononline.com/bobs-burgers-season-9-episode-3-tweentrepreneurs. I cannot figure out how to extract the video url from this website. I used Chrome and Firefox web developer tools to figure out it is in an iframe, but extracting src urls with BeautifulSoup searching for iframes, returns links that have nothing to do with the video. Where are the references to mp4 or flv files (which I

问题 I need to play 3gp, FLV, avi Video file format in my application. I had searched lot about it. Got some library like "FFmpeg" Library. But could not find any sample code for it. Any other ways for it are also appreciated. Does any body have done it before? I am even not sure that if it is possible or not in iOS. Please give me solution for it. UPDATE : I tried one 3gp Video in my AVquePlaye but it is not play in my code, While i use same Video in WhatsApp in my iPhone , Surprisingly video is

问题 I'm trying to use a drop down window to be able to change the rate of which a video is playing at. I've added the options on markup here: <select id="playBackRateDrop"> <option>0.5</option> <option selected= "selected">1</option> <option>1.5</option> <option>2</option> </select> Added a variable to getElementById here var playRate= document.getElementById("playBackRateDrop"); Added a actionListener to the dropdown window playRate.addEventListener("select", setPlaySpeed); And created a

问题 I'm using the video.js plugin. I'm using ajax to load in another bunch of videos from another page but I want to call the javascript again to perform the skinning again. Is there a callback function I can use after my ajax has finished loading in the html? To be specific I'm after the actual function name (if there is one) that video.js has made. ie the javascript which runs to dress up the videos. 回答1: Ajax has a success call back you may be able to use. $.ajax({ type: "GET", url: url,

问题 Im trying to display different video resolution according to the users screen height resolution, i have this code but im not an expert with javascript. It's supposed to change the src attribute, if the res is lower o equal to 360px height, and so on. Any suggestions? <script type="text/rocketscript"> var v = new Array(); v[0] = ["https://dl.dropboxusercontent.com/u/51626189/nli-vids/intro/intro-360_x264.mp4"]; v[1] = ["https://dl.dropboxusercontent.com/u/51626189/nli-vids/intro/intro-480_x264

问题 I'm trying to add water mark on image and video. For image i got the solution as below Image water marking code Method static void addWatermarkOnImage(String text, File sourceImageFile, File destImageFile) { try { BufferedImage sourceImage = ImageIO.read(sourceImageFile); Graphics2D g2d = (Graphics2D) sourceImage.getGraphics(); // initializes necessary graphic properties AlphaComposite alphaChannel = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.1f); g2d.setComposite(alphaChannel);