video

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . Hello i have an android application , in which i want a video chat functionality , i searched a lot on internet but couldnot find any working and simple solution to this , then i found hangout api , now i want to add hangout video call feature to my own application but i cannot

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . Hello i have an android application , in which i want a video chat functionality , i searched a lot on internet but couldnot find any working and simple solution to this , then i found hangout api , now i want to add hangout video call feature to my own application but i cannot

问题 I'm generating an app preview video to send to the AppStore. Depending on the device type, the AppStore requires certain video resolutions. I have a main video, with resolution 1920x1080, which I was able to upload. I need to generate another video with the resolution 1920x886 for supporting 6.5" devices, so I used the following command to perform the scaling: ffmpeg -i video_1920_1080.mp4 -vf scale=1920:886 -c:a copy video_1920_886.mp4 If I get the info for the generated video using ffmpeg

问题 How can I create a mpg/mp4 file from let's say 10 images using ffmpeg. Each image shall stay for 5 minutes, after the 5 minutes are over the next image shall appear and so on.... How can I achieve this? 回答1: If your images are numbered in a sequence (img001, img002, img003..), use ffmpeg -framerate 1/300 -i img%3d.jpg -r 5 video.mp4 (I've set an output framerate of 5 for player compatibility. Each image will still remain for 300 seconds) If your filenames are irregular, and you are executing

问题 I'm concatenating 2 video files 00000 and 00001: ffmpeg -y -f concat -safe 0 -i file_list.txt -loglevel error -c copy test.mp4 file_list.txt: file '00000.mp4' file '00001.mp4' 00000.mp4: Duration: 00:00:00.42, start: 0.000000, bitrate: 204 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 182 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default) 00001.mp4: Duration: 00:00:01.63, start: 0.000000, bitrate: 58 kb/s Stream #0:0(und): Video: h264 (High) (avc1 /

问题 I've stuggled to find an answer to this problem, I would like to add controls to HTML5 background video, so that users can at least choose to pause the video for accessibility reasons. The built-in HTML5 "Controls" attribute work just fine but as soon as I add my CSS to put the video in the background, the controls disappear. How do I keep the controls and have the video in the background? Here is my simple HTML5 code: <div class="fullscreen-bg"> <video controls loop muted autoplay poster=

问题 I've stuggled to find an answer to this problem, I would like to add controls to HTML5 background video, so that users can at least choose to pause the video for accessibility reasons. The built-in HTML5 "Controls" attribute work just fine but as soon as I add my CSS to put the video in the background, the controls disappear. How do I keep the controls and have the video in the background? Here is my simple HTML5 code: <div class="fullscreen-bg"> <video controls loop muted autoplay poster=

问题 I've stuggled to find an answer to this problem, I would like to add controls to HTML5 background video, so that users can at least choose to pause the video for accessibility reasons. The built-in HTML5 "Controls" attribute work just fine but as soon as I add my CSS to put the video in the background, the controls disappear. How do I keep the controls and have the video in the background? Here is my simple HTML5 code: <div class="fullscreen-bg"> <video controls loop muted autoplay poster=

问题 I am trying to reduce the frame/window size of my video capture to 320x180 but I can't seem to do it. I am using a Windows Kinect for Xbox One and its connected to my pc using an adapter. I have tried setting the cv2.CAP_PROP_FRAME_WIDTH to 320 and cv2.CAP_PROP_FRAME_HEIGHT to 180 but once I try and get the values it returns 1920 and 1080. I have also tried installing and reinstalling the Kinect SDK and drivers. import cv2 import numpy as np vid = cv2.VideoCapture(0) vid.set(cv2.CAP_PROP

问题 I use the following command to pipe the FFmpeg output to 2 ffplay , but it doesn't work. ffmpeg -ss 5 -t 10 -i input.avi -force_key_frames 00:00:00.000 -tune zerolatency -s 1920x1080 -r 25 -f mpegts output.ts -f avi -vcodec copy -an - | ffplay -i - -f mpeg2video - | ffplay -i - How can I pipe the FFmpeg output to 2 (or more) ffplay? I saw this page but it doesn't work for ffplay. (it is for Linux but my OS is windows) Please help me Thanks 回答1: There's some kind of Tee-Object (alias tee ) in