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• Using fluen-ffmpeg to overlay video on a video (at top left or right)

  18 juin 2021, par Ruthwik Reddy

  So the title should make sense I want to overlay one video on another.
It's getting confused at so many places with concatenating video it's not that, I want to do something like this :


  


  I am able to do this in normal ffmpeg using this command

  

  


  ffmpeg -i VideoB.mp4 -i VideoA.mp4 -map 0:0 -map 1:1 -vf "movie=VideoA.mp4, scale=400:-1 [inner]; [in][inner] overlay=0:0 [out]" VideoAinsideVideoBsoundA.mp4


  


  I'm having trouble writing this in fluent-ffmpeg going through StackOverflow I found something like this but the issue here is it's treating both videos separately but I want to overlay one on another.
This is the code which places videos side by side there is extra space as padding if I try to mess with sides.

  


  ffmpeg()
   .input("./videoA.mp4")
   .input("./videoB.mp4")
   .complexFilter([
     "[0:v]scale=300:300[0scaled]",
     "[1:v]scale=300:300[1scaled]",
     "[0scaled]pad=600:300[0padded]",
     "[0padded][1scaled]overlay=shortest=1:x=300[output]",
   ])
   .outputOptions(["-map [output]"])
   .output("./out.mp4")
   .on("error", (err) => {
     console.log(err.message);
   })
   .on("end", () => {
     console.log("success");
   })
   .run()


  


  Can someone guide me here thank you.

  


• avformat/hlsenc : Add deinit function

  15 décembre 2019, par Andreas Rheinhardt

  avformat/hlsenc : Add deinit function
  This fixes memleaks in instances such as :
  
  a) When an allocation fails at one of the two places in hls_init() where
  
  the error is returned immediately without goto fail first.
  
  b) When an error happens when writing the header.
  
  c) When an allocation fails at one of the three places in
  
  hls_write_trailer() where the error is returned immediately without goto
  
  fail first.
  
  d) When one decides not to write the trailer at all (e.g. because of
  
  errors when writing packets).
  
  Furthermore, it removes code duplication and allows to return
  
  immediately, without goto fail first.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/hlsenc.c

• OpenCV3 returning float FRAME_COUNT

  15 mars 2016, par mprat

  I am using OpenCV3 on OSX with Python 2.7 bindings. However, when I try to read the frame count of my video (a .mp4 video), it returns a float - I am expecting an int. Do I need to compile OpenCV3 with some special flags ? Am I missing some codecs ?

  import cv2
  
  vid = cv2.VideoCapture("vid.mp4")
  
  print vid.get(cv2.CAP_PROP_FRAME_WIDTH)

  And it returns a float.

  Installation details :

  • ffmpeg : brew install ffmpeg --with-dcadec --with-openh264 --with-openjpeg --with-openssl --with-tools --with-x265  --with-zimg --with-libvidstab --with-libvpx
  • opencv3 : brew install opencv3 --with-ffmpeg --with-contrib