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• FFMPEG HLS streaming and transcodding on the fly to HTML player - video duration changes while transcoding

  20 août 2019, par Thomas Tho

  I am trying to make a video streaming server and watch videos directly from web browser. The idea is to make the server to stream video from remote server, transcode with different audio format in local server, and then instantly stream to the client (this is specific way I need it to function).
  This is the FFMPEG code im currently using :

  ffmpeg -i "url" -c:v copy -c:a aac -ac 2 -f hls -hls_time 60 -hls_playlist_type event -hls_flags independent_segments out.m3u8

  The HLS stream is attached to the HTML player with hls.js and it works. However, the video duration is constantly changing while video is being transcoded. I have tried to change video duration with JS like $('video').duration = 120;with no luck.

  How do i make the player to display the video file duration instead of stream current transcoded time ?

  I am also planning to implement video seeking but i am clueless. The current idea is to send seeking time to the server, terminate ffmpeg, and start from specific time. However, i think the player might get stuck on loading and will not start playing without reloading.

• Store a videostream from webcam but as 1s long files that can later be merged together [duplicate]

  17 février 2018, par Jennifer R

  This question is an exact duplicate of :

  • How to segment a video and then concatenate back into original one with ffmpeg
    
    1 answer
    

  I’m trying to store a videostream from a webcam but need it to be 1s long files. I have never worked with storing videofiles so i’m not sure if and how i should use opencv and how those videofiles need to be contained that i can merge them together. I tried the old windows cmd code

  copy /b *.avi combined.avi

  but since avi is sort of a container type i only got as far as the first file. I’m guessing since there’s some container data limiting the first file and i can’t watch it.

  I need help in both questions. How can i store a video stream and how do i merge those videos ? Do i use ffmpeg for the latter and is it possible to edit the container data to the correct length ?

• Why does an "ffmpeg fail" occur when trying to export frames from my "data_src.mp4" file, while using DeepFaceLab ?

  28 août 2020, par Toby Ryberg

  I've been following this step-by-step videoin installing and using DeepFaceLab on my Macbook Pro, which uses OS Catalina. I've been stuck at the step which begins at the 4:42 mark, where he enters this code :

  


  python main.py videoed extract-video —input-file WORKSPACE/data_src.mp4 —output-dir WORKSPACE/data_src

  


  After entering the command, I'm prompted to enter an FPS value ; no problem. Next, it asks for a file output type, which is where I get tied up— as far as I know. It appears as though I can enter either png or jpeg, but receive the same error message, which looks like this :

  


  / !\ ffmpeg fail, job commandline :['ffmpeg', '-i', '/Users/tobyryberg/Documents/deepfakes/DeepFaceLab/WORKSPACE/data_src.mp4', '-pix_fmt', 'rgb24', '/Users/tobyryberg/Documents/deepfakes/DeepFaceLab/WORKSPACE/data_src/%5d.png']

  


  I have no idea what went wrong, as I BELIEVE that I have been doing everything right thus far. If this is at all necessary information, I've opted to use an 18+ minute long video for my source clip, which is an .mp4 file, without audio. If there's someone out there who has the patience to work with me and figure out what went wrong, I'll be forever grateful !