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• FFMPEG RTP MpegTS Muxrate

  4 décembre 2017, par Lhh92

  I am needing an application that takes an input rtp MpegTS stream and re-muxes it, remaps the PIDs and then sends it out as an RTP MpegTS multicast. I understand FFMPEG in its current form cannot do this as the rtp_mpegts does not pick up the options from the command line.

  I have started to look at the FFMPEG source to find a way to add it into to have these options. I am slightly confused by the way FFMPEG uses the AVFormatContext to pass around information. I have added a new priv_class to the rtp_mepgts which points to a class with options in it (identical to the mpegtsenc.c class) so that the options will actually be added to that context. However, it is now failing when trying to do a realloc somewhere.

  Before going down the line too far - is this the correct approach to take ? Is this how to add the options correctly to FFMPEG or is there another way completely I should be looking ?

• How to open and view an image stored in .yuv format ?

  20 juin 2018, par Electrix

  I have an image(grayscale) stored as a .yuv file. How do i open the image to see with any viewer or preferably opencv ??
  Using on command line -
  display -size 640x480 -colorspace gray -depth 8 4:2:0 -interlace plane 0001.yuv shows the image in a blurred form.
  ffmpeg -i 0001.bmp.yuv -f rawvideo -pix_fmt gray out.jpg gives -

  Output file #0 does not contain any stream

  Its a 640x480 image. All the related questions talk about .yuv videos.

• ffmpeg convert video file with 8 audio channels to multichannel wav

  6 avril 2017, par imgoingtoshabooms

  on run input, parameters
  tell application "Terminal"
  activate
  set filesString to ""
  repeat with file_ in input
  set filesString to filesString & " " & quoted form of (POSIX path >of file_)
  end repeat
  do script "for f in" & filesString & " ; do
   /Documents/ffmpeg/ffmpeg -i \"$f\" -acodec pcm_s16le \"$f%.*.wav\"
  done"
  end tell
  return input
  end run

  I wrote an applescript to add a right-click service in OS X, but this only takes the first channel and creates a mono wav file. How can i create a multichannel wav to accommodate 8 mono tracks ?