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• After scaled video, it convert transparent background to white

  8 mars 2017, par Sohaib Raza

  I scaled video using ffmpeg. When i scaled video, the output video having white background ,while the input video having transparent background.
  below command using for scaled video.

  ffmpeg -i inputVideo.mp4 -vf scale=100:100 outputVideo.mp4

  you can see the image below that is take from my video,for more understanding my problem.

  image from input video
  

  you can see the above image from input video having no white background.

  image from output video
  

  you can see the above image from output video having white backgournd.

  please give me your valuable answer regarding this question.
  any answer will be very appreciate.

  D: onProgress:   configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
D: onProgress:   libavutil      55. 17.103 / 55. 17.103
D: onProgress:   libavcodec     57. 24.102 / 57. 24.102
D: onProgress:   libavformat    57. 25.100 / 57. 25.100
D: onProgress:   libavdevice    57.  0.101 / 57.  0.101
D: onProgress:   libavfilter     6. 31.100 /  6. 31.100
D: onProgress:   libswscale      4.  0.100 /  4.  0.100
D: onProgress:   libswresample   2.  0.101 /  2.  0.101
D: onProgress:   libpostproc    54.  0.100 / 54.  0.100
D: onProgress: Input #0, gif, from '/storage/emulated/0/Pictures/eye.gif':
D: onProgress:   Duration: N/A, bitrate: N/A
D: onProgress:     Stream #0:0: Video: gif, bgra, 480x190, 5 fps, 10 tbr, 100 tbn, 100 tbc
D: onProgress: Output #0, gif, to '/storage/emulated/0/GIF/REV20170308_101145.gif':
D: onProgress:   Metadata:
D: onProgress:     encoder         : Lavf57.25.100
D: onProgress:     Stream #0:0: Video: gif, bgr8, 125x56, q=2-31, 200 kb/s, 10 fps, 100 tbn, 10 tbc
D: onProgress:     Metadata:
D: onProgress:       encoder         : Lavc57.24.102 gif
D: onProgress: Stream mapping:
D: onProgress:   Stream #0:0 -> #0:0 (gif (native) -> gif (native))
D: onProgress: Press [q] to stop, [?] for help
D: onProgress: frame=   11 fps=0.0 q=-0.0 Lsize=      17kB time=00:00:02.90 bitrate=  48.8kbits/s speed=14.8x<br />
D: onProgress: video:16kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 5.287261%
D: Started command : ffmpeg [Ljava.lang.String;@422f62d0
D: onSuccess: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
    built with gcc 4.8 (GCC)
    configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
    libavutil      55. 17.103 / 55. 17.103
    libavcodec     57. 24.102 / 57. 24.102
    libavformat    57. 25.100 / 57. 25.100
    libavdevice    57.  0.101 / 57.  0.101
    libavfilter     6. 31.100 /  6. 31.100
    libswscale      4.  0.100 /  4.  0.100
    libswresample   2.  0.101 /  2.  0.101
    libpostproc    54.  0.100 / 54.  0.100
  Input #0, gif, from '/storage/emulated/0/Pictures/eye.gif':
    Duration: N/A, bitrate: N/A
      Stream #0:0: Video: gif, bgra, 480x190, 5 fps, 10 tbr, 100 tbn, 100 tbc
  Output #0, gif, to '/storage/emulated/0/GIF/REV20170308_101145.gif':
    Metadata:
      encoder         : Lavf57.25.100
      Stream #0:0: Video: gif, bgr8, 125x56, q=2-31, 200 kb/s, 10 fps, 100 tbn, 10 tbc
      Metadata:
        encoder         : Lavc57.24.102 gif
  Stream mapping:
    Stream #0:0 -> #0:0 (gif (native) -> gif (native))
  Press [q] to stop, [?] for help
  frame=   11 fps=0.0 q=-0.0 Lsize=      17kB time=00:00:02.90 bitrate=  48.8kbits/s speed=14.8x<br />
  video:16kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 5.287261%

• FFMPEG Keyframes Exception

  3 avril 2017, par newToRacket

  I was hoping someone could help me, when pulling keyframes from a .mp4 file using FFMPEG in python I get this error :

       C:\Python27\python.exe "C:/Coll. Detection/UAS_Detection/GUI.py"
  
  in GUI main
  
  ('filePath', PyQt4.QtCore.QString(u'C:\\Users\\Razor\\Downloads\\video_test_512kb.mp4'), '\n')
  
  File Path -> C:\Users\Razor\Downloads\video_test_512kb.mp4
  
  SingleDetect C:\Users\Razor\Downloads\video_test_512kb.mp4
  
  ffmpeg version N-84679-gd65b595 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 6.3.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 51.100 / 55. 51.100
  
    libavcodec     57. 86.103 / 57. 86.103
  
    libavformat    57. 67.100 / 57. 67.100
  
    libavdevice    57.  3.101 / 57.  3.101
  
    libavfilter     6. 78.100 /  6. 78.100
  
    libswscale      4.  3.101 /  4.  3.101
  
    libswresample   2.  4.100 /  2.  4.100
  
    libpostproc    54.  2.100 / 54.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Razor\Downloads\video_test_512kb.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      creation_time   : 1970-01-01T00:00:00.000000Z
  
      title           : test file mp4 - http://www.archive.org/details/Pbtestfilemp4videotestmp4
  
      encoder         : Lavf51.10.0
  
      comment         : license:  http://creativecommons.org/licenses/by-nc-sa/2.5/
  
    Duration: 00:00:16.27, start: 0.000000, bitrate: 562 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 512 kb/s, 15 fps, 15 tbr, 15 tbn, 30 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 45 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0000000003500e00] deprecated pixel format used, make sure you did set range correctly
  
  Output #0, image2, to 'tmp/%d.jpeg':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      comment         : license:  http://creativecommons.org/licenses/by-nc-sa/2.5/
  
      title           : test file mp4 - http://www.archive.org/details/Pbtestfilemp4videotestmp4
  
      encoder         : Lavf57.67.100
  
      Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 15 fps, 15 tbn, 15 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.86.103 mjpeg
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
  
  2017-04-02 18:36:07.832000
  
  Traceback (most recent call last):
  
    File "Detection.py", line 59, in <module>
  
      draw_detections(frame, found)
  
    File "Detection.py", line 32, in draw_detections
  
      result = Result.objects.create(picture=img, x=x, y=y, w=w, h=h)
  
  AttributeError: type object 'Result' has no attribute 'objects'
  
  frame=   21 fps=0.0 q=19.3 Lsize=N/A time=00:00:16.06 bitrate=N/A speed= 191x    
  
  video:160kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  
  
  Process finished with exit code 0
  
  </module>

  I’m trying to run these keyframes through an opencv human shape recognition api. It saves close to 300 keyframes to the folder I specified but for some reason the program just hangs afterwords instead of running the open cv hogger api on the newly saved keyframes. Will post script if it will help. Thank you for any help you can provide !!!

• Video cropping with FFMpeg on Android is very slow [duplicate]

  7 avril 2017, par Rami Jemli

  This question already has an answer here :

  • Fast Video Compression on Android
    
    2 answers
    

  What i tried :

  I am trying to implement video cropping on android using FFMpeg (ffmpeg-android).
  

  Here is the command I use :
  

  String[] complexCommand = {"-i", inputPath, "-strict", "experimental", "-vf", "crop=1080:1080:0:0", "-threads", "5", "-c:v", "libx264", "-preset", "ultrafast", filePath};

  The problem :

  Video cropping is working, but even though I am using all needed options to make the operation fast, it still takes a 1min long video the same duration to crop.
  

  How can I achieve better speeds ?
  Will I need to implement video cropping on server instead of device ?
  Is there another way to implement video cropping on Android instead of FFMpeg ?

  I understand that I can achieve better UX by letting the user edit a cropped TextureView/SurfaceView while doing the actual cropping in background, but I want to avoid this way as it takes more time.

  UPDATE

  Here is FFMpeg’s log output :

  SUCCESS with output : ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
      built with gcc 4.8 (GCC)
  
      configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
      libavutil      55. 17.103 / 55. 17.103
  
      libavcodec     57. 24.102 / 57. 24.102
  
      libavformat    57. 25.100 / 57. 25.100
  
      libavdevice    57.  0.101 / 57.  0.101
  
      libavfilter     6. 31.100 /  6. 31.100
  
      libswscale      4.  0.100 /  4.  0.100
  
      libswresample   2.  0.101 /  2.  0.101
  
      libpostproc    54.  0.100 / 54.  0.100
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/100ANDRO/MOV_0066.mp4':
  
      Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2017-04-02 11:58:58
  
      com.android.version: 6.0.1
  
      Duration: 00:00:59.60, start: 0.000000, bitrate: 17759 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17498 kb/s, SAR 1:1 DAR 16:9, 29.90 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
      rotate          : 90
  
      creation_time   : 2017-04-02 11:58:58
  
      handler_name    : VideoHandle
  
      Side data:
  
      displaymatrix: rotation of -90.00 degrees
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 155 kb/s (default)
  
      Metadata:
  
      creation_time   : 2017-04-02 11:58:58
  
      handler_name    : SoundHandle
  
      [libx264 @ 0xb5bc4400] using SAR=1/1
  
      [libx264 @ 0xb5bc4400] using cpu capabilities: none!
  
      [libx264 @ 0xb5bc4400] profile High 4:4:4 Predictive, level 3.2, 4:2:0 8-bit
  
      [libx264 @ 0xb5bc4400] 64 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x1:0x1 me=dia subme=1 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=5 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=0
  
      Output #0, mp4, to '/storage/emulated/0/Download/compress_video1.mp4':
  
      Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      com.android.version: 6.0.1
  
      encoder         : Lavf57.25.100
  
      Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1080x1080 [SAR 1:1 DAR 1:1], q=-1--1, 29.92 fps, 11488 tbn, 29.92 tbc (default)
  
      Metadata:
  
      handler_name    : VideoHandle
  
      creation_time   : 2017-04-02 11:58:58
  
      encoder         : Lavc57.24.102 libx264
  
      Side data:
  
      unknown side data type 10 (24 bytes)
  
      Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
      creation_time   : 2017-04-02 11:58:58
  
      handler_name    : SoundHandle
  
      encoder         : Lavc57.24.102 aac
  
      Stream mapping:
  
      Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
      Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
      Press [q] to stop, [?] for help
  
      frame=    6 fps=0.0 q

  Any help is greatly appreciated !