Newest 'ffmpeg' Questions - Stack Overflow

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• Dynamic video creation using multiple images

  22 février 2014, par user996048

  I want to create a user video which should take a photo album as input and play exactly like Facbook Look back video.

  I have looked at couple of option including imagemagick and ffmpeg. Are there any good alternatives available for doing this.

• Create video from image sequence starting at image_100

  22 février 2014, par Johanna

  I'm using ffmpeg to convert a sequence of images into a .mov file. The command line I use is:

  ffmpeg.exe -f image2 -i im_%04d.jpeg -r 25 -sameq -vcodec mjpeg out.mov
  

  It works fine if the first image of the sequence starts at im_0000, but when the first image starts for example at im_0100, then I get an

  im_%04d.jpeg: Error number -2 occurred
  

  How can I force it to analyse the sequence, no matter what number the first image is?

• How can I simulate ffmpeg's empty_moov option within code ?

  22 février 2014, par mczarnek

  Command-line ffmpeg has the ability to use an empty moov_atom at the beginning of a file.

  More info: http://www.ffmpeg.org/ffmpeg-formats.html#Options-3

  I would like to do the same thing, except within code. Anyone know how?

• How to stream video using ffmpeg

  21 février 2014, par Nedeljko

  I am very stupid and can not solve problem using google.

  I need the command line for windows to start ffmpeg to read raw data video in yuv420 format in local y4m file, encode it as x264 and send it as stream over network. Then I must be able to play this stream via VLC player.

  Also, I need solution for C++ which receives yuv420 stream from somewhere and send it to local ffmpeg application to encode it as x264 and send it via network as stream.

  Thanx a lot.

• How to extract an Image from a video file in qt ?

  21 février 2014, par Wagmare

  I want to extract an image (First frame) form a video file in qt. I used ffmpeg application to extract a frame, it gives extact result what I need, but ffmpeg is a seperate application, which overloads process. So I want to make it as static linking. Is it possible make static link to ffmpeg , is there is any statick library available for extracting frame from video or are there any other ways to extract frame from video? I dont want to use Qt phonon, because it physically opens a phonon dialog and then take a scrrenshot. I want the extracting process should happenin background.

  Thanks in Advance