Newest 'ffmpeg' Questions - Stack Overflow

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• Android and ffmpeg libb - can't build

  15 décembre 2011, par nmnir

  I'm trying to build my native app with ffmpeg. the ndk-build output is $ ../../../ndk-build Prebuilt : libffmpeg.so <= cp: omitting directory/cygdrive/c/android2/android-ndk-r6/samples/native-audio/jni' make: * [/cygdrive/c/android2/android-ndk-r6/samples/native-audio/obj/local/armeabi/libffmpeg.so] Error 1

  Here is my Android.mk:

  LOCAL_PATH := $(call my-dir) 
  #declare the prebuilt library 
  include $(CLEAR_VARS) 
  LOCAL_MODULE := ffmpeg-prebuilt 
  LOCAL_SRC_FILES := ffmpeg/android/armv7-a/libffmpeg.so 
  LOCAL_EXPORT_C_INCLUDES := ffmpeg/android/armv7-a/include 
  LOCAL_EXPORT_LDLIBS := ffmpeg/android/armv7-a/libffmpeg.so 
  LOCAL_PRELINK_MODULE := true 
  include $(PREBUILT_SHARED_LIBRARY) 
  
  include $(CLEAR_VARS) 
  LOCAL_ALLOW_UNDEFINED_SYMBOLS=false 
  LOCAL_MODULE := native-audio-jni 
  LOCAL_SRC_FILES := native-audio-jni.cpp 
  LOCAL_C_INCLUDES := $(LOCAL_PATH)/ffmpeg/android/armv7-a/include 
  LOCAL_SHARED_LIBRARY := ffmpeg-prebuilt 
  LOCAL_LDLIBS    := -lOpenSLES -landroid -llog -ljnigraphics -lz -lm $(LOCAL_PATH)/ffmpeg/android/armv7-a/libffmpeg.so 
  LOCAL_STATIC_LIBRARY := stdc++
  include $(BUILD_SHARED_LIBRARY)
  

• Building native app with ffmpeg lib

  15 décembre 2011, par nmnir

  I have created libffmpeg.so using the android build system. Now I'm trying to use in my app. Pls help me with following questions:

  1. How do I add ffmpeg to my includes directory?
  2. How do I link to ffmpeg.so?

  Thanks, Nahum

  ---

  Well I did at written, getting the following error: 1.7.9(0.237/5/3) Prebuilt : libffmpeg.so <= cp: omitting directory/cygdrive/c/android2/android-ndk-r6/samples/native-audio /jni' make: * [/cygdrive/c/android2/android-ndk-r6/samples/native-audio/obj/local/ar meabi/libffmpeg.so] Error 1`

  Please advice. Thanks, Nahum

• Creating a pipe between C# and Ffmpeg

  15 décembre 2011, par John Oliver

  I have a C# program that creates a video and saves it to the disk in real-time. Instead of doing that, I want it to write it directly in a pipe connected with ffmpeg...

  The function that keeps saving the video in the disk, which I can not control, receives an IntPtr with a reference to the file.

  So, I need to create a pipe or something like that with ffmpeg, get a pointer to that, and use that pointer in the function, so that it streams the file to ffmpeg and not the disk...

  Regards, John Oliver

• How to encode video using ffmpeg-java on Android from Bitmaps ?

  15 décembre 2011, par gtcompscientist

  I am using ffmpeg-java compiled for Android to encode/decode video for my application.

  The problem that I've run into is that I am currently getting each frame as a Bitmap (just a plain android.graphics.Bitmap) and I can't figure out how to stuff that into the encoder.

  Here is the code that I am using to instantiate all the ffmpeg libraries:

      AVCodecLibrary cLibrary = AVCodecLibrary.INSTANCE;
      cLibrary.avcodec_register_all();
      cLibrary.avcodec_init();
  
      AVFormatLibrary fLibrary = AVFormatLibrary.INSTANCE;
      fLibrary.av_register_all();
  
      //AVUtilLibrary uLibrary = AVUtilLibrary.INSTANCE;
      //uLibrary.av_malloc();
  
      AVCodec pCodec = cLibrary.avcodec_find_encoder(AVCodecLibrary.CODEC_ID_H263);
      if (pCodec == null)
      {
          Logging.Log("Unable to find codec.");
          return;
      }
      Logging.Log("Found codec.");
  
  
      AVCodecContext codecCtx = cLibrary.avcodec_alloc_context();
      codecCtx.bit_rate = 64000;
      codecCtx.coded_width = VIDEO_WIDTH;
      codecCtx.coded_height = VIDEO_HEIGHT;
      codecCtx.time_base = new AVRational(1, VIDEO_FPS);
      codecCtx.pix_fmt = AVCodecLibrary.PIX_FMT_YUV420P;
      codecCtx.codec_id = AVCodecLibrary.CODEC_ID_H263;
      //codecCtx.codec_type = AVMEDIA_TYPE_VIDEO;
  
      if (cLibrary.avcodec_open(codecCtx, pCodec) < 0)
      {
          Logging.Log("Unable to open codec.");
          return;
      }
      Logging.Log("Codec opened.");
  

  This is what I want to be able to execute next:

  cLibrary.avcodec_encode_video(codecCtx, pPointer, pFrame.size(), pFrame);
  

  But, as of now, I don't know how to put the Bitmap into the right piece or if I have that setup correctly.

  A few notes about the code: - VIDEO_WIDTH = 352 - VIDEO_HEIGHT = 288 - VIDEO_FPS = 30; - I'm unsure about how pPointer and pFrame are handled.

• Anybody has any idea how this site works ? www.ivipid.com [closed]

  14 décembre 2011, par Aamir Siddique

  I am a website developer (php) and i have been given a task to develop a similar website:

  http://ivipid.com/

  I need to make an identical website and i am trying to figure out how this can be done.

  Any ideas would be highly appreciated, please advice.

  Thanks!