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• laravel-ffmpeg - fopen(/tmp/laravel-ffmpegi340VY.mkv) : failed to open stream : No such file or directory

  26 janvier 2020, par jyoti gautam

  Using the laravel-ffmpeg librabry to convert video file from .webm to mp4 aws s3 bucket url and using following code.

  $videoFile = '/courses/images/1579626678msr-2020-01-21T17-11-18-771Z.webm';  //= upload/video1.mp4
  
     FFMpeg::fromDisk('s3')
  
      ->open($videoFile)
  
      ->getFrameFromSeconds(10)
  
      ->export()
  
      ->toDisk('s3')
  
      ->inFormat(new \FFMpeg\Format\Video\X264)
  
      ->save('small_steve.mp4');

  How can access file from s3 bucket and convert ?

• FFMPEG Open several video files at the same time ? C++ [on hold]

  8 octobre 2017, par LemanRass

  I wrote a C++ plugin for playing videos using FFmpeg libraries. All works perfectly when playing a single video, but when I try to play at least 2 videos at the same time I have these errors :

  #01 pc 0000714d  /data/app/com.ffmpeg.sdk.videoplugin-
  
  1/lib/arm/libAndroidVideoPlugin.so (_ZN12FFmpegReader13ReadNextFrameEPvPc+404)
  
  #02 pc 00005a9f  /data/app/com.ffmpeg.sdk.videoplugin-
  
  1/lib/arm/libAndroidVideoPlugin.so (_ZN9Videofile17UpdateFramesCacheEv+118)
  
  #03 pc 000057d1  /data/app/com.ffmpeg.sdk.videoplugin-
  
  1/lib/arm/libAndroidVideoPlugin.so (_firstUpdateThread+80)

  It seems that when I open the second video it, replaces the first one.
  I came up with this idea when I opened 2 videos one by one (without any errors) then I started to play only the second one and as a result I didn’t get any errors. But when I tried to read frames from the first video, my app crashed with the error above.

  A bit about plugin`s structure :

  1. I created a class called FFmpegReader where methods work
     directly with ffmpeg (Opening file, ReadFrames and returning them as void*,
     Seek and Close).

  2. Then I created one more class which creates a FFmpegReader instance using
     the "new" operator inside its constructor, descriptor (unique id of the opened
     file), queue of cached frames (up to 100 at the same time) and
     methods to operate with FFmpegReader and framesCache.

  3. I created a main file where I created a vector of objects of class from
     the second point I described above. Also I declared 4 threads for each
     opened video file (4 opened videos is the max number of allowed opened
     videos at the same time). They call the method to update a cache of frames in
     its own video file using the video file descriptor. Finally I declared methods
     which will be called from the main app which is using this plugin to retrieve
     cached frames from cache.

  As you can see, I did everything to let it works separately with each new opened video. It seems the problem is inside of FFmpeg. There might be some restrictions I’m not aware of.

  ================UPDATE=================

  Sources of Main: https://pastebin.com/DfGH0BRZ
  
  Sources of Videofile class: https://pastebin.com/WjdS532B
  
  Sources of FFmpegReader class: https://pastebin.com/aPHpBvBv

  Hope it’s gonna help...

• Error in installing Open-CV with ffmpeg

  24 décembre 2013, par Matteo

  I am trying to install the library Open-CV working on on Ubuntu 11.04.

  I followed all instructions found in the InstallationGuide.

  However after installing with success I realized that I hadn't FFMPEG support because in my configuration file FFMPEG was disabled :

  Video I/O: 
  
  --     DC1394 1.x:                 NO 
  
  --     DC1394 2.x:                 YES 
  
  --     FFMPEG:                     NO 
  
  --       codec:                    YES 
  
  --       format:                   YES 
  
  --       util:                     YES 
  
  --       swscale:                  NO 
  
  --       gentoo-style:             YES 
  
  --     GStreamer:                  YES 
  
  --     UniCap:                     NO 
  
  --     PvAPI:                      NO 
  
  --     V4L/V4L2:                   Using libv4l 
  
  --     Xine:                       NO

  So I tried to rebuild everything after installing FFMEPG as decribed here.

  After configuring installation with the instruction

  cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON ../OpenCV-2.3.1

  I ran the make command getting this error :

  make[2]: *** [bin/opencv_test_calib3d] Error 1
  
  make[1]: *** [modules/calib3d/CMakeFiles/opencv_test_calib3d.dir/all] Error 2
  
  make: *** [all] Error 2

  This is the point of compilation where the error is coming out :

  Linking CXX executable ../../bin/opencv_test_calib3d
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_analysis_headerout'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_out_samplerate'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_disable_reservoir'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_encode_buffer'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vaUnmapBuffer'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vaDestroyBuffer'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_comment_clear'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_param_default'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_param_apply_profile'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_brate'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_encoder_headers'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `faacEncGetCurrentConfiguration'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_analysis_blockout'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_info_clear'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_analysis_buffer'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_comment_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vaCreateBuffer'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_bWriteVbrTag'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `faacEncSetConfiguration'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_encode_ctl'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `D_IF_decode'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `faacEncGetDecoderSpecificInfo'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_block_clear'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_close'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_encoder_encode'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_VBR'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `Encoder_Interface_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_analysis'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_get_framesize'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `faacEncOpen'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_encode_packetout'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_quality'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `Decoder_Interface_exit'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_encode_alloc'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_encode_setup_vbr'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_info_clear'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_in_samplerate'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_encoder_reconfig'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_param_apply_fastfirstpass'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_VBR_quality'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_mode'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `D_IF_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_set_num_channels'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `faacEncEncode'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_encode_setup_managed'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `Encoder_Interface_exit'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `Decoder_Interface_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vaRenderPicture'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_encode_ctl'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_info_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_analysis_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_encoder_delayed_frames'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_param_parse'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_encode_free'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `D_IF_exit'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_dsp_clear'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `Decoder_Interface_Decode'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vaMapBuffer'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_block_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_bit_depth'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_picture_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_encoder_close'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_encoder_open_120'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `faacEncClose'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vaEndPicture'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_encode_flush'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_encode_buffer_interleaved'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_comment_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_comment_clear'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_init_params'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `x264_param_default_preset'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_encode_setup_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_bitrate_addblock'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_comment_add_tag'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_encode_flushheader'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `lame_encode_buffer_int'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `th_encode_ycbcr_in'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_bitrate_flushpacket'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_analysis_wrote'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vorbis_info_init'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `Encoder_Interface_Encode'
  
  ../../lib/libopencv_highgui.so.2.3.1: undefined reference to `vaBeginPicture'
  
  collect2: ld returned 1 exit status

  can anybody please tell me what's the problem with installation process I'm following ?

  Why is there this library referentiation error ?