Recherche avancée

Sur d’autres sites (12198)

• To see IP Camera using FFMPEG

  14 janvier 2013, par Pike

  I try to use ffmpeg on android and want to see IP Camera
  but somethings wrong
  avformat_open_input(&gFormatCtx, "rtsp ://root:root@111.111.111.111/profile1/media.smp",NULL,NULL)
  av_open_input_file(&gFormatCtx,"rtsp ://root:root@111.111.111.111/profile1/media.smp", NULL, 0, NULL)
  

  two function can't return handle
  

  so add —enable-network —enable-protocol=tcp —enable-demuxer=rtsp —enable-decoder=h264 option
  

  then
  

  C:/Work/FFmpegBasic/obj/local/armeabi-v7a/libavformat.a(rtpdec.o): in function av_register_rtp_dynamic_payload_handlers:C:/Work/FFmpegBasic/jni/ffmpeg/libavformat/rtpdec.c:89: error: undefined reference to 'ff_g726_16_dynamic_handler'
  
   C:/Work/FFmpegBasic/obj/local/armeabi-v7a/libavformat.a(rtpdec.o): in function av_register_rtp_dynamic_payload_handlers:C:/Work/FFmpegBasic/jni/ffmpeg/libavformat/rtpdec.c:89: error: undefined reference to 'ff_g726_24_dynamic_handler'
  
   C:/Work/FFmpegBasic/obj/local/armeabi-v7a/libavformat.a(rtpdec.o): in function av_register_rtp_dynamic_payload_handlers:C:/Work/FFmpegBasic/jni/ffmpeg/libavformat/rtpdec.c:89: error: undefined reference to 'ff_g726_32_dynamic_handler'
  
   C:/Work/FFmpegBasic/obj/local/armeabi-v7a/libavformat.a(rtpdec.o): in function av_register_rtp_dynamic_payload_handlers:C:/Work/FFmpegBasic/jni/ffmpeg/libavformat/rtpdec.c:89: error: undefined reference to 'ff_g726_40_dynamic_handler'
  
   C:/Work/FFmpegBasic/obj/local/armeabi-v7a/libavcodec.a(allcodecs.o): in function avcodec_register_all:C:/Work/FFmpegBasic/jni/ffmpeg/libavcodec/allcodecs.c:346: error: undefined reference to 'ff_libaacplus_encoder'
  
   C:/Work/FFmpegBasic/obj/local/armeabi-v7a/libavcodec.a(allcodecs.o): in function avcodec_register_all:C:/Work/FFmpegBasic/jni/ffmpeg/libavcodec/allcodecs.c:346: error: undefined reference to 'ff_libspeex_encoder'
  
  collect2: ld returned 1 exit status
  
  /cygdrive/c/android-ndk-r8d/build/core/build-binary.mk:397: recipe for target `/cygdrive/c/Work/FFmpegBasic/obj/local/armeabi-v7a/libbasicplayer.so' failed
  
  make: *** [/cygdrive/c/Work/FFmpegBasic/obj/local/armeabi-v7a/libbasicplayer.so] Error 1

  but when I use nm(1) I found the symbol
  does anyone help me ?
  

• Android ffmpeg0.8 is not compiling with android ndk5 with cygwin compiler

  7 novembre 2013, par itsrajesh4uguys

  I am using the following tutorial for ffmpeg compilation .

  http://www.roman10.net/how-to-build-ffmpeg-for-android/

  I am followed all the instructions which they have provided. have changed the path in
  build_android.sh ,
  i am using android ndk5 and cygwing latest compiler.
  But i am facing following issue. .so file is not gets created .

  Krajesh@Rajesh /cygdrive/D/RAJESH-ANDROID/Rajesh-workspace/FFMPEG_2
  
  $ /cygdrive/d/Android_NDK/android-ndk-r5/ndk-build
  
  Prebuilt       : libffmpeg.so <= jni/ffmpeg-0.8/android/armv7-a/
  
  Install        : libffmpeg.so => libs/armeabi-v7a/libffmpeg.so
  
  install: cannot open `/cygdrive/D/RAJESH-ANDROID/Rajesh-workspace/FFMPEG_2/obj/local/armeabi-v7a/libffmpeg.so' for reading: Permission denied
  
  /cygdrive/d/Android_NDK/android-ndk-r5/build/core/build-binary.mk:305: recipe for target `/cygdrive/D/RAJESH-ANDROID/Rajesh-workspace/FFMPEG_2/libs/armeabi-v7a/libffmpeg.so' failed
  
  make: *** [/cygdrive/D/RAJESH-ANDROID/Rajesh-workspace/FFMPEG_2/libs/armeabi-v7a/libffmpeg.so] Error 1

  Can any one please explain why i am getting that permission denied issue and how to overcome that . i am using windows 7 pc.

  Thanks.
  Rajesh K

• Faster frame extraction than ffmpeg

  23 janvier 2013, par Ben Ford

  I have a video analytics program that processes assorted frames from a video. (Several hours long)
  The video is likely going to be an MP4 but may be other formats going forwards.

  At the moment, I have a C# wrapper around an ffmpeg call to extract an individual frame at the requested time. (I'm using the ffmpeg.exe binary. Not the libraries directly)
  At the moment, this all works. But it's slow. Very slow.

  I've found ways to improve the speed by storing the extracted frames in a ramdisk while they're being processed. Changing the stored image format etc...

  I just wanted to check if anyone could think of any way to pull individual frames out. At split-second accuracy.
  I know this is probably possible with DShow etc... I went straight to FFMPEG as I've used it before. But if DShow is likely to be faster I'll gladly change !