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• android NDK cannot locate symbol "mmap64"

  4 juin 2018, par tainguyen

  I’m a beginer in ffmpep, I did my first simple project as this tutorial

  https://proandroiddev.com/android-ndk-how-to-integrate-pre-built-libraries-in-case-of-the-ffmpeg-7ff24551a0f?gi=72f471c40747

  But it raised the error "cannot locate mmap64 symbol...".

  Help me please !

  This is my logcat :

  java.lang.UnsatisfiedLinkError : dlopen failed : could not load library "libavutil.so" needed by "libnative-lib.so" ; caused by cannot locate symbol "mmap64" referenced by "libavutil.so"...
  at java.lang.Runtime.loadLibrary(Runtime.java:365)
  at java.lang.System.loadLibrary(System.java:526)
  at video.media.tainguyen.test_ffmpeg_ndk.MainActivity.(MainActivity.java:12)
  at java.lang.Class.newInstanceImpl(Native Method)
  at java.lang.Class.newInstance(Class.java:1208)
  at android.app.Instrumentation.newActivity(Instrumentation.java:1079)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2222)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2363)
  at android.app.ActivityThread.access$900(ActivityThread.java:161)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1265)
  at android.os.Handler.dispatchMessage(Handler.java:102)
  at android.os.Looper.loop(Looper.java:157)
  at android.app.ActivityThread.main(ActivityThread.java:5356)
  at java.lang.reflect.Method.invokeNative(Native Method)
  at java.lang.reflect.Method.invoke(Method.java:515)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
  at dalvik.system.NativeStart.main(Native Method)

  I built my so file with NDK r17, ffmpeg version 3.4, ubuntu 12.04.5(64bit) (I just built it in ubuntu, my current OS is windows 7 64 bit)
  My project is created in android studio 2.2 using NDK r17

  compileSdkVersion 27

  buildToolsVersion "27.0.2"

  minSdkVersion 15

  targetSdkVersion 27

  externalNativeBuild
  cmake
  cppFlags ""
  arguments "-DANDROID_STL=c++_shared"
  targets "native-lib","avutil","avformat","avcodec"
  
  
  ndk
  abiFilters "x86", "x86_64", "armeabi-v7a", "arm64-v8a", "armeabi"
  

• FFMPEG hevc_nvenc "No NVENC capable devices found" with NVidia GTX950M

  5 juillet 2018, par NaturalBornCamper

  I get the error "No NVENC capable devices found" when trying a simple encoding like this, even skipping audio to make sure it’s not an audio problem :

  ffmpeg.exe -i input.mp4 -c:v hevc_nvenc -an out.mp4

  I also tried with more details, like setting the pixel format, the preset, the rate-control, the format.

  On the documentation page there :
  https://trac.ffmpeg.org/wiki/HWAccelIntro
  it says that if we get this error we should check for the pixel format. The video has yuv420p here and even specifying the format results in the same error.

  i also checked the NVidia supported cards and it says GeForce, but no details about the models :
  https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Encoder

  I tried h264_nvenc and it works perfectly however, the problem is only with hevc_nvenc
  Has anyone encountered this problem ?

  Complete console output :

  [h264 @ 0000000002534560] Reinit context to 1280x544, pix_fmt: yuv420p
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isom
  
      creation_time   : 2014-05-23T13:04:15.000000Z
  
    Duration: 01:54:03.95, start: 0.000000, bitrate: 3193 kb/s
  
      Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x544 [SAR 1:1 DAR 40:17], 2750 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-05-23T11:25:27.000000Z
  
      Stream #0:1(spa): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 439 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-05-23T12:56:43.000000Z
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_nvenc))
  
  Press [q] to stop, [?] for help
  
  [h264 @ 000000000260ea40] Reinit context to 1280x544, pix_fmt: yuv420p
  
  [graph 0 input from stream 0:0 @ 0000000003857ec0] w:1280 h:544 pixfmt:yuv420p tb:1/24000 fr:24000/1001 sar:1/1 sws_param:flags=2
  
  [hevc_nvenc @ 00000000038574e0] Loaded Nvenc version 8.0
  
  [hevc_nvenc @ 00000000038574e0] Nvenc initialized successfully
  
  [hevc_nvenc @ 00000000038574e0] 1 CUDA capable devices found
  
  [hevc_nvenc @ 00000000038574e0] [ GPU #0 - < GeForce GTX 950M > has Compute SM 5.0 ]
  
  [hevc_nvenc @ 00000000038574e0] Codec not supported
  
  [hevc_nvenc @ 00000000038574e0] No NVENC capable devices found
  
  [hevc_nvenc @ 00000000038574e0] Nvenc unloaded
  
  Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  Conversion failed!

• qsv : Error out if getting session handle failed in avfilter

  15 août 2018, par Zhong Li

  qsv : Error out if getting session handle failed in avfilter
  Solve some issues found by an automated code scansion.
  
  Suppress the complain "variables ’handle’ is used but maybe
  
  uninitialized".
  Signed-off-by : Zhong Li <zhong.li@intel.com>
  
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  

  • [DBH] libavfilter/qsvvpp.c
  • [DBH] libavfilter/vf_deinterlace_qsv.c
  • [DBH] libavfilter/vf_scale_qsv.c