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• libavfilter/dnn : remove limit for the name of DNN model input/output

  25 avril 2019, par Guo, Yejun

  libavfilter/dnn : remove limit for the name of DNN model input/output
  remove the requirment that the name of DNN model input/output
  
  should be "x"/"y",
  Signed-off-by : Guo, Yejun <yejun.guo@intel.com>
  
  Signed-off-by : Pedro Arthur <bygrandao@gmail.com>
  

  • [DH] libavfilter/dnn_backend_native.c
  • [DH] libavfilter/dnn_backend_tf.c
  • [DH] libavfilter/dnn_interface.h
  • [DH] libavfilter/vf_sr.c

• Elastic Transcoder output duration doesnt match with the sum of my Input duration

  28 mars 2019, par auricless

  I have multiple media file to concatenate into a single video file. Composed of different media types including video, audio and image. I use FFMPEG to convert audio and images to a video then finally, will use Elastic Transcoder to stitch/concatenate the video files in a single one. On creating transcoder job, whenever I placed the input video which is originally an image, converted by FFMPEG, to be the last input in order, it shrinks the duration of its exposure in the final output by 5 seconds whenever its original duration is > 5. This happens only with that condition.

  Example :
  (1) video1 - 10s
  (2) image1 - 10s
  (3) video2 - 15s
  (4) image2 - 20s
  output : video - 40s
  (image2’s duration or exposure in the output shrinks to approx. 5s)

  Clearly, the sum of Input duration and the Output duration does not match. It is even explicitly stated on the Job result of elastic transcoder.

  ---

  Thought I had a wrong conversion settings in FFMPEG so I changed some options. After some changes and comparing the image converted to video (V1) with an authentic video to stitch with (V2), their settings are almost the same. In this I use ffmpeg -i myVideo.mp4 to check its details. They differ only on SAR, DAR, tbr and tbn and I dont really know what are their use.

  Already checked the duration of the converted images after ffmpeg conversion and it is accurate, it only messed up after feeding it to the elastic transcoder and placed as the last input.

  Here is my conversion command with FFMPEG(image to video) :
  ffmpeg -r 29.97 -i [input.jpg] -f lavfi -i anullsrc=r=48000:cl:stereo -t [duration] -acodec aac -vcodec libx264 -profile:v baseline -pix_fmt yuv420p -t [duration] -vf scale=854:480 -strict -2 [output.mp4]

  The expected result should be that the output file is consistent with the actual duration it has.

  [EDIT]

  Here’s real videos I feed on Elastic Transcoder using ffprobe filename :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'clip2.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.71.100
  
    Duration: 00:00:10.05, start: 0.042667, bitrate: 476 kb/s
  
      Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
      Stream #0:1(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 2136:2135 DAR 89:50], 341 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'image2.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.12.100
  
    Duration: 00:02:10.03, start: 0.033333, bitrate: 130 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1943:1004 DAR 829661:240960], 2636 kb/s, SAR 283440:146461 DAR 1181:343, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

• error ffmpeg Cannot open display :0.0+0,0, error 1. :0.0+0,0 : Input/output error

  15 mars 2019, par SUPERMAN

  Hello I get this error when i want to capture my screen on linux with ffmpeg ubuntu 16:04 :

  the command i’am using :

  $ ffmpeg -f x11grab -r 15 -s 1920x1080 -i :0.0+0,0 -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video0
  
  ffmpeg version 4.1.1-0york1~16.04 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.11) 20160609
  
    configuration: --prefix=/usr --extra-version='0york1~16.04' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-nonfree --enable-libfdk-aac --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  [x11grab @ 0x5611f156e540] Cannot open display :0.0+0,0, error 1.
  
  :0.0+0,0: Input/output error