8 mai

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 17:29
  PyQt QGraphicsScene Render Scene As Video Format - Alex Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to allow the user to export the scene as an mp4 (video format), the items of the scene consists of QGraphicsVideoItem and multiple QGraphicsTextItem, I need to export the scene as it will allow the user to save the video with the text items. I've found one of the ways to do this but the issue is that it will take hours for a simple 5 seconds videos as it saves every image to a byte to create a video, every image is a millisecond. If I change from millisecond to seconds it could speed up but the video will not look as smooth, is there a more efficient way of doing (...)
• 17:17
  ffmpeg filters inserting escape characters in python [duplicate] - jdauthre Newest 'ffmpeg' Questions - Stack Overflow
  I am running ffmpeg in python as a subprocess. I want to burn the subtitles into a video. Just using ffmpeg (commandline without python in windows) the following works: ffmpeg.exe" -y -i "input_file" -vf "subtitles= \\'input_file_path\\' :si=0" -acodec copy "output_file_path" the \\ escape characters are required by ffmpeg for special characters within a filter, However trying to replicate this within a python subprocess has proved problematic, here is one of many failed attempts: command = (...)
• 16:30
  How do I correctly pause and resume recording with ffmpeg without messing with the fps? - 10typesofpeople Newest 'ffmpeg' Questions - Stack Overflow
  I am recording desktop video and audio with ffmpeg. I am controlling the process with c#. Simplified, my ffmpeg arguments are "ffmpeg -f gdigrab -framerate 30 -i desktop -preset ultrafast -pix_fmt yuv420p output.mp4" I have some functionality to pause and resume the recording, essentially just suspending and resuming the process. This works, however, it leaves the paused section in the video, just one frame for the entire duration. To fix this, I added "-vf setpts=N/FR/TB" yo the arguments. This resolved that issue, but while recording my framerate was 1.3 fps rather than 30 and the (...)
• 15:22
  How can I convert a video raw frame to image using ffmpeg [closed] - Sean Newest 'ffmpeg' Questions - Stack Overflow
  I have a video stream (from a DJI Drone) coming to a websocket server.The websocket server saves the data using the technique described in this answer. Technical Details The frame is : From a H265 video generated by the drone has size: height 1080 , width 1440 FPS : 30 Size: 45235 This is the raw video data as we receive from the getData() function of the video frame returned by the addStreamDataListener method Goal I want that the saved frame (I have noted the peculiar size) to be converted to ffpmeg. Attempt(s) to (...) -- getData() function, addStreamDataListener method, github
• 14:58
  pylwdrone and ffmpeg-python: pipe:0: Invalid data found when processing input - Saail Chavan Newest 'ffmpeg' Questions - Stack Overflow
  I am using a lewei camera on my drone and i have managed to get the stream using https://github.com/meekworth/pylwdrone, i want to do basic image processing like face or object detection or qr code scan which i am unable to do when i use this command in terminal: $ pylwdrone stream start --out-file - | ffplay -i -fflags nobuffer -flags low_delay -probesize 32 -sync ext - i get a clear feed with no errors enter image description here When i am using the script in python i am getting errors and the feed is bit lagged and skips frames pipe:0: Invalid data (...) -- https://github.com/meekworth/pylwdrone, enter image description here
• 15:07
  I use ffmpeg to format videos according to tik-toke standards - John Red Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg to format videos according to tik-toke standards, but I don't know why videos are not cropped and lose quality. const transcode = async () => const ffmpeg = ffmpegRef.current; await ffmpeg.writeFile('input.mp4', await fetchFile(file)); await ffmpeg.exec([ '-i', 'input.mp4', '-vf', 'scale=1080:1920,crop=ih*(9/16):ih', 'output.mp4' ]); const data = await ffmpeg.readFile('output.mp4'); videoRef.current.src = URL.createObjectURL(new Blob([data.buffer], (...)
• 13:21
  Can't reproduce a mp4 video in any of my browsers (Ubuntu 22.04.4) - user3303019 Newest 'ffmpeg' Questions - Stack Overflow
  This one is weird. I can't reproduce the following video in the browser (tried brave, chrome, firefox and edge). https://a-pop.stg.intuitivo.ai/assets/animations/wowMomentOpenDoor.mp4 I have installed all sorts of codecs I may need and the regular video player plays the file no problem. For some reason it was working on Brave up until last week and it wasn't on chrome. It only happens on Linux apparently. Windows, Mac, android and iOS have no problem with the browser playing the animation. I don't have a clue what could be (...) -- https://a-pop.stg.intuitivo.ai/assets/animations/wowMomentOpenDoor.mp4
• 13:13
  OpenGL to FFMpeg encode - Ian A McElhenny Newest 'ffmpeg' Questions - Stack Overflow
  I have a opengl buffer that I need to forward directly to ffmpeg to do the nvenc based h264 encoding. My current way of doing this is glReadPixels to get the pixels out of the frame buffer and then passing that pointer into ffmpeg such that it can encode the frame into H264 packets for RTSP. However, this is bad because I have to copy bytes out of the GPU ram into CPU ram, to only copy them back into the GPU for encoding.
• 12:20
  React JS video compressor - Muhammadali Newest 'ffmpeg' Questions - Stack Overflow
  I tried it and sure enough I'm not typing the correct command in exec. Please let me know if you have a video resizing command for exec. const compress = async () => const videoURL = "../public/videos/20240508_095425.mp4"; const ffmpeg = ffmpegRef.current; await ffmpeg.writeFile("input.mp4", await fetchFile(videoURL)); await ffmpeg.exec([ "-i", "input.mp4", "-c:v", "copy", "-c:a", "aac", "-b:a", "128k", "output.mp4", ]); const fileData = await ffmpeg.readFile("output.mp4"); const data = new (...)
• 11:54
  Is there a way to improve/ decode .h264 stream and use opencv for image processing - Saail Chavan Newest 'ffmpeg' Questions - Stack Overflow
  I am using a lewei camera on my drone and i have managed to get the stream using https://github.com/meekworth/pylwdrone, i want to do basic image processing like face or object detection or qr code scan which i am unable to do when i use this command in terminal: $ pylwdrone stream start --out-file - | ffplay -i -fflags nobuffer -flags low_delay -probesize 32 -sync ext - i get a clear feed with no errors enter image description here When i am using the script in python i am getting errors and the feed is bit lagged and skips frames import cv2 import (...) -- https://github.com/meekworth/pylwdrone, enter image description here, enter image description here

Piwik http://piwik.org/

• 03:35
  CRO Program: Best Practices and KPIs to Track [2024] - Erin Piwik
  Driving traffic to your website is only one part of the equation; the second part is getting those visitors to convert by completing a desired action — creating an account, signing up for a newsletter or completing a purchase. But if you fail to optimise your website for conversions, you’ll have a hard time guiding visitors further down the funnel and turning them into customers. That’s where a CRO program (or conversion rate optimisation) can help. This article will cover conversion rate optimisation best practices and outline key metrics and KPIs to start tracking to see an improvement (...) -- terms and conditions, data processing agreement (DPA)

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 11:00
  Using ffmpeg to extract multiple images from video and get timestamp of extracted images - jogall Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to extract one frame (as a jpeg) every five minutes from videos, and piping the output from the console to a text file in order to get the exact timestamps of the extracted frames. The command I'm using is: ffmpeg -i input.avi -ss 00:10:00 -vframes 10 -vf showinfo,fps=fps=1/300 %03d.jpg &> output.txt Where -ss 00:10:00 lets me skip ahead 10 mins in the video before starting, and -vframes 10 lets me capture only the first 10 frames (1 frame per 5 mins). This almost works fine except that the command outputs information for all frames, (...)
• 09:09
  Record D3.js whiteboard animation as mp4 audio and video - Jin Ng Newest 'ffmpeg' Questions - Stack Overflow
  I have a whiteboard/hand sketching app written with D3.js svg path elements. These elements are grouped into scenes with their own mp3 audio. Multiple scenes with their animated svg paths are played according to a timeline, with the audio running perfectly. So the end result is like a whiteboard animated movie. This works well within the app. How can i record the whole animation as a mp4 file? I would like to run this entirely on the client side. I have looked at ffmpeg but prefer not to do a desktop install for this web app. I looked into using (...)
• 05:27
  File conversion to mp3 returning failure everytime using flutter package ffmpeg_kit_flutter - Sanath balthar Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert an audio file generated from flutter "text to speech" package to mp3 file but it is failing everytime. I have written the below code for file conversion. The conversion fails everytime. I have imported the package ffmpeg_kit_flutter. It doesnt even show why the conversion is failing. I have looked up in stackoverflow and other sites but could not find any relevant solutions. I am using vscode as editor. I have attached flutter doctor output below as well. Could anyone please guide me? Let me know if you need more information. List command = [  (...)
• 03:58
  Check if a video file has subtitles - TRS Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to check if a video file has a subtitle using bash and get a simple answer like "yes" or "no". I don't need to know any details about the subtitles. Maybe using ffmpeg?
• 03:23
  seeking in a file that ffmpeg is processing from a live stream - Ken Mandelberg Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to take input from a live stream and write an mkv file. The stream runs a few hours. I want to play the mkv file while this is in progress. I find that the players basically do "seeks" by playing through the file, which is ok for very short "seeks" but not for very long ones. When the ffmpeg ends it finalizes the mkv file, and seeks long or short work fine. What can I do to be able to have a more usable mkv while ffmpeg is in progress? I suppose I could force ffmpeg to create a new mkv file every hour, with a name including an index. (Is there any (...)
• 01:33
  FPS reduction for H264 - Александр А Newest 'ffmpeg' Questions - Stack Overflow
  There is a USB camera that sends H264 frames with a frequency of 30 fps in a resolution of 1920x1080, which requires throughput of about 6 mbit/s. It is necessary to reduce this to no more than 2 mbit/s. All this is done on a weak ARMv7, so the option of transcoding is extremely resource intensive, especially considering that I did not find how to do it as a GPU Mali. Given that the basic functionality is performed on the framework ffmpeg, is it possible to reduce the frame rate, ideally to 10 fps, WITHOUT loss of quality and (...)

7 mai

Piwik http://piwik.org/

• 22:27
  How (and Why) to Run a Web Accessibility Audit in 2024 - Erin Piwik
  When most businesses design their websites, they primarily think about aesthetics, not accessibility. However, not everyone who visits your website has the same abilities or access needs. Eight percent of the US population has visual impairments. The last thing you want is to alienate website visitors with a bad experience because your site isn’t up to accessibility standards. (And with growing international regulation, risk fines or lawsuits as a result.) A web accessibility audit can help you identify and fix any issues for users with impaired vision, hearing or other physical (...) -- terms and conditions, data processing agreement (DPA)