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• Use ffmpeg with python

  24 février 2014, par user2063350

  I have an ffmpeg setup on my pc, which streams mp3 with this code :

  ffmpeg -f dshow -i audio="Input device" -c:a libmp3lame -f mpegts udp://192.168.1.2:7777

  Also i have a server and I want to start recording stream to mp3 file whenever stream starts. Server is running all day long listening for pc to connect.
  How can I do this with python ? I want to create unique file with time and date in filename in filename each time stream starts. Can I do this using udp protocol or what protocol do You suggest me to use ? and what modules in python are helpful for this task ?

  subprocess.call('ffmpeg -y -i udp://192.168.1.2:7777 -acodec copy output.mp3')

  P.S. Sorry for my bad English.

• FFMPEG mp4 input on android

  2 juin 2017, par DweebsUnited

  I have been banging my head against the wall on this for a while now. I need to trim part of an mp4 file, using ffmpeg on android. I have ffmpeg compiled, linked, and I can confirm that it works as expected in my ndk calls. What I am running into is getting an mp4 file to ffmpeg in a protocol it can actually work with.

  Right now, I have a Uri for the file that I get a ParcelFileDescriptor from. I pass its file descriptor to an ndk call that does all the ffmpeg processing using the pipe protocol. Issue : ffmpeg cannot read an mp4 over the pipe protocol, because it needs to seek back to the start once it finds the moov atom.

  All I’m doing is remuxing the videos. I’m not doing any heavy work, or more complicated ffmpeg calls

  Attempted solution : Set up custom AVio calls that open the descriptor as a file stream, and handle it that way. Issue : file descriptor from java is not seekable, it’s more of a stream.

  Possible solution : Preprocess videos to have the moov atom at the front. Issue : Not allowed, the files come from somewhere I cannot control.

  Possible solution : Run one call to find all the file information, then another to actually remux the file. Issue : I don’t know what I need to save from the first parse through to make this possible. Just the moov atom ? Can I just replace the io object in the first call’s inputFormatContext with a new one in the second call ? Can I pass it two distinct file descriptors, both to the same file, and not have to make two ndk calls ?

  Any help or ideas you can offer is greatly appreciated.

• configure : Make compilable with VS2015

  6 mars 2015, par Peter Tissen

  configure : Make compilable with VS2015
  So Visual Studio 2015 has some breaking changes regarding the C
  
  runtime. In short, they made C99 compatable runtime.
  
  Refer to http://blogs.msdn.com/b/vcblog/archive/2014/06/18/crt-features-fixes-and-breaking-changes-in-visual-studio-14-ctp1.aspx
  Made-Seriously-Happy : "Ronald S. Bultje" <rsbultje@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] configure