Recherche avancée

Sur d’autres sites (7710)

• OpenCV stream captured CAM with H264 (mp4) codec

  28 août 2015, par user1200794

  I like to stream the web cam pictures wich are captured by opencv. I think about a solution with ffmpeg and live555 (poorly they are not document so well). My problems are :

  1. How can convert the captured images to a H264 format so the picures/second match. If it is in a loop I get more than 25 pictures/sekond and the video is to fast.

  2. How can i directly stream the converted H264 stream over the network via rtp / rtps or similar.

  Thanks for your help !

• FFmpeg Slideshow + Audio + Watermark + Maintain Aspect Ratio

  16 janvier 2016, par Pamela

  I’m trying to make a slideshow from some pictures along with an existing mp3 (copied). Picture dimensions differ, but I want the video output to be 16:9 aspect ratio and 3840x2160. I also want a watermark. It is important that pictures are not stretched.

  I tried this code...

  ffmpeg -y -framerate 1/1.5 -i "pics/%03d.jpg" -i audio.mp3 -c:v libx264 -r 24 -preset veryfast -tune stillimage -c:a copy -pix_fmt yuv420p -aspect 16:9 -filter_complex "scale=iw*min(3840/iw\,2160/ih):ih*min(3840/iw\,2160/ih),pad=3840:2160:(3840-iw)/2:(2160-ih)/2, movie=watermark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" vid.mkv

  But it is giving me this error :

  [AVFilterGraph @ 0x2d21480] Too many inputs specified for the "movie"
  filter. Error initializing complex filters. Invalid argument

  I am able to successfully make a slideshow with pictures, audio, and watermark ; however, I am unable to factor in the aspect ratio without having pictures getting stretched.

  If it makes a difference, the output video will be uploaded to YouTube.

• Is there any way to resume live h264 playback (client rejoin) using the h.264 codec ?

  22 février 2021, par Ice

  Currently, I'm having a bit of an issue with the MediaSource API for resuming live h264 playback.
My server-side code will keep the first packet from FFmpeg, then dispatch it to clients. However, this works well but raises an issue.

  


  When I restart the stream and it dispatches to the client(s), it goes as expected and this is the result I expect when a client disconnects then has to reconnect to the stream, is the aforementioned result

  


  However, if I were to rejoin the stream, I get this as the result

  


  Also, FFMpeg data is being sent to the client in the picture above, it's just not rendering it for some reason.

  


  Here's my function for playing audio/video frames that I get from the server.

  


  private _playFrame(type: 0 | 1) {
    const src = type === 0 ? this.audioSource : this.videoSource;
    if (!src || src.updating) return;
    const queue = type === 0 ? this.audioFrameQueue : this.videoFrameQueue;
    src.appendBuffer(queue.shift());
    if (this.video.src && this.video.paused) this.video.play().then(() => null);
}