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• FFMPEG + Android wrapper using the latest versions off FFMPEG

  8 avril 2014, par StackOverflowed

  I am trying to compile FFMPEG to work with my Android app. I've looked at : https://github.com/halfninja/android-ffmpeg-x264 which is almost what I want but I need a later version of FFMPEG (so I'm trying to use the latest, 2.2).

  I'm using most of the scripts located there, but the problem is after I run compile_make_everything.sh, I try to run ndk-build but I get errors (basically it can't find the main function in ffmpeg.c).

  This is my Android.mk :

  LOCAL_PATH := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  
  
  #LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
  
  LOCAL_MODULE  := videokit
  
  LOCAL_SRC_FILES := videokit/com_myapp_example_FFMpegService.c 
  
  
  
  LOCAL_LDLIBS := -llog -ljnigraphics -lz -landroid
  
  
  
  LOCAL_STATIC_LIBRARIES :=ffmpeg
  
  
  
  include $(BUILD_SHARED_LIBRARY)
  
  $(call import-module,ffmpeg-2.0.1/android/arm)

  If I modify my LOCAL_SRC_FILES to include ffmpeg.c, it fails when I tries to find some of the helper libraries it requires :
  LOCAL_SRC_FILES := videokit/com_myapp_example_FFMpegService.c ffmpeg/ffmpeg.c ffmpeg/cmdutils.c

  The error :

  In file included from
  /home/me/ffmpeg/new-android-ffmpeg/Project/jni/ffmpeg/ffmpeg.c:44:0 :
  /home/me/ffmpeg/new-android-ffmpeg/Project/jni/ffmpeg/libavformat/avformat.h:255:32 :
  fatal error : libavcodec/avcodec.h : No such file or directory
  compilation terminated.

  How can I include the latest ffmpeg library while still being able to call the main function ?

• Can you split a file using ffmpeg directly from a db ?

  31 mars 2014, par Jeff

  I am splitting a file using ffmpeg and python. I am able split a file if I input a file path, but if I send in the file itself from my mongodb, it errors out. Is there a way to get ffmpeg to run using the file instead of the path to the file ?

  python code :

  args = [ffmpeg_binary,
  
                           "-v", "quiet",
  
                           "-y", "-i", video_file, "-vcodec", "copy", "-acodec", "copy",
  
                   "-ss", "00:00:00", "-t", "00:00:10", "-sn",
  
                   output_file_name ]
  
  
  
  pipe = sp.Popen(args)

  if video_file is a gridfs.grid_file.GridOut object or a (gridfs.grid_file.GridOut object).read(), I get :

  Traceback (most recent call last):
  
    File "C:/dev/youniversity/test.py", line 21, in <module>
  
      split_vid_from_file(vid_file)
  
    File "C:\dev\youniversity\src\lib\ffmpeg_lib.py", line 107, in split_vid_from_file
  
      pipe = sp.Popen(args)
  
    File "C:\Python27\lib\subprocess.py", line 709, in __init__
  
      errread, errwrite)
  
    File "C:\Python27\lib\subprocess.py", line 957, in _execute_child
  
      startupinfo)
  
  TypeError: must be string without null bytes or None, not str
  
  </module>

  How do I split the video directly from the DB ?

  EDIT : I found that you can do this :

  ... "-y", "-", ... 
  
  
  
  pipe = sp.Popen(args, stdin=sp.PIPE)

  but I don't want the user to type input, I want to pipe in the variable.

• Encode h264 automatically on nginx server

  18 février 2017, par Thinh Pham

  I have installed and configured my own streaming server using Nginx with rtmp module base on this tutorial https://www.vultr.com/docs/setup-nginx-on-ubuntu-to-stream-live-hls-video. I only use live application and record stream into flv file. And now I want to encode any new flv files in my VOD directory automatically to play it on my website. Is it possible to config it in my nginx.conf ? I have tried set record_suffix .mp4; in order to play it without encode but failed.
  Additional, exec ffmpeg -i is not work for me when I want to restream into mobile application.