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• how to add subtitle and watermark on multi videos at same time in ffmpeg ?

  16 novembre 2020, par shadymelad

  i want to know how to add sutitle and watermark for maulti videos on one folders by FFMPEG like game of thrones all episode ?
i make watermark for all folders one time by useing thie code

  


  


  for %i in ("C :\Users\fady\Downloads\convert*.mp4") do ffmpeg -i "%i"
-i C :\Users\fady\Downloads\convert\fady.png -filter_complex "overlay=main_w-overlay_w-10:10" -codec:a copy
"C :\Users\fady\Downloads\convert\new% ni.mp4"

  


  


  but i want to add subtitle on the code
any one can help ?

  


  update
i try this code

  


  


  ffmpeg -i .mkv -i Cima2u.png -filter_complex "[0]subtitles=.srt[v] ;[1][v]scale2ref=w='iw*10/100':h='ow/mdar'[wm][vid] ; [vid][wm]overlay=main_w-overlay_w-5:main_h-overlay_h-5" -preset fast % ni.mp4

  


  


  but this for one file if i want to make it for folder many files can i ?

  


• FFMPEG : How to extract a PNG sequence from a video, remove duplicate frames in the process and keep the original frame number ?

  16 mai 2020, par Simon

  I have a recording of an old game which has variable framerate. Since I want to process individual frames to upscale and modernize the footage I would like to avoid any duplicate frames. I know that I can use this function to extract all frames from a video :

  



  ffmpeg -i input.mov -r 60/1 out%04d.png


  



  And I know that I can remove duplicate frames using this function :

  



  ffmpeg -i input.mov -vf mpdecimate,setpts=N/FRAME_RATE/TB output.mov


  



  However, the above command removes duplicate frames and puts frames next to each other whereas in order to keep a timecode of sorts it would be a lot more useful to be able to extract PNGs with frame number (video is progressive 60fps) but without all of the duplicates.

  



  So, the question is : what if I want to extract PNG files BUT maintain the original corresponding framenumber within the sequence ? So, if we have a video with 10 frames and frames 2-8 are duplicates it spits out 1.png 2.png 9.png and 10.png ? How do I combine both bits of code listed above ?

  


• WebRTC H264 video live streaming (w FFMPEG) from OpenGL

  25 novembre 2022, par OBI

  I am trying to make a peer-to-peer game streaming platform. At this point I managed to capture the OpenGL frames and I have a functional Java websockets server, I can have 2 clients that establish a peer to peer connection (I have solved the STUN/TURN servers part) and transfer text at this point.

  



  I do not quite understand how I could stream a video made out of the Opengl frames with a low latency (<100ms). The problem mainly lies in the FFMPEG part, I want to use this to encode the frames, get the result (stdin/stdout redirect for ffmpeg ?), somehow link to the the JS API of the host (maybe a local websocket to which the JS of the hoster will connect to).

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  I tried several FFMPEG arguements/commands with stdin and stdout pipes and they did not work.

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