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• Java VLCJ canvas and drawing ontop with transparent background

  23 janvier 2013, par Dizzle

  I have spent a bit of time researching about whether it is possible to draw on top of a VLCJ movie within a Java application. I have found a few bits of conflicting advice some saying it is not possible and some referencing articles which have moved on oracle.com.

  Can someone clarify if it is or is not possible to draw java2d graphics like rectangles/lines which also have transparent backgrounds so the video stream underneath can be viewed whilst the shapes are present on screen ?

  If this is not possible with vlcj what would be a good alternative for a linux and windows compatible media player allowing for annotation over a playing video stream ? Please note i do not have to be limited to java but something where i can get re-use out of developed drawing routines for multiple platforms would be ideal.

• FFMPEG overlay issue for 2 videos, sound missing from second input

  7 septembre 2014, par Abhishek Singh

  I’m trying to achive an overlay with ffmpeg wich take the two flv files as input and make a output and both videos playing simultaneously. things are working fine with below ffmpeg command :

  ffmpeg -i input1.flv -vf "[in] scale=359:320, pad=2*iw+6:ih [left]; movie=input2.flv, scale=359:320 [right]; [left][right] overlay=365:0 [out]" -b:v 3600k -y output.flv

  But issue is with the sound of second video and that is missing from the output.flv, only input1 sound is available in the output.flv.

  Console output is :

  ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Nov 25 2012 12:23:20 with gcc 4.7.2 (GCC)
  
    configuration: --disable-static --enable-shared --enable-gpl --enable-version3
  
   --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib
  
  --enable-frei0r --enable-libass --enable-lib`enter code here`opencore-amrnb --enable-libopencore-
  
  amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut -
  
  -enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger -
  
  -enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --
  
  enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enab
  
  le-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52.  9.100 / 52.  9.100
  
    libavcodec     54. 77.100 / 54. 77.100
  
    libavformat    54. 37.100 / 54. 37.100
  
    libavdevice    54.  3.100 / 54.  3.100
  
    libavfilter     3. 23.102 /  3. 23.102
  
    libswscale      2.  1.102 /  2.  1.102
  
    libswresample   0. 17.101 /  0. 17.101
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, flv, from 'input1.flv':
  
    Metadata:
  
      canSeekToEnd    : false
  
      createdby       : FMS 4.0
  
      creationdate    : Mon Jan 07 07:05:40 2013
  
      encoder         : Lavf54.37.100
  
    Duration: 00:03:04.81, start: 0.000000, bitrate: 314 kb/s
  
      Stream #0:0: Video: flv1, yuv420p, 160x120, 3600 kb/s, 1k tbr, 1k tbn, 1k tb
  
  c
  
      Stream #0:1: Audio: mp3, 22050 Hz, mono, s16, 32 kb/s
  
  Output #0, flv, to 'output.flv':
  
    Metadata:
  
      canSeekToEnd    : false
  
      createdby       : FMS 4.0
  
      creationdate    : Mon Jan 07 07:05:40 2013
  
      encoder         : Lavf54.37.100
  
      Stream #0:0: Video: flv1 ([2][0][0][0] / 0x0002), yuv420p, 724x320, q=2-31,
  
  3600 kb/s, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: mp3 ([2][0][0][0] / 0x0002), 22050 Hz, mono, s16p
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (flv -> flv)
  
    Stream #0:1 -> #0:1 (mp3 -> libmp3lame)
  
  Press [q] to stop, [?] for help
  
  frame=  120 fps=0.0 q=4.5 size=     550kB time=00:00:08.57 bitrate= 525.3kbits/s
  
  frame=  225 fps=221 q=2.0 size=    1422kB time=00:00:18.26 bitrate= 637.6kbits/s
  
  Buffer queue overflow, dropping.
  
  [Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
  
      Last message repeated 1 times
  
  frame=  338 fps=222 q=2.0 size=    2414kB time=00:00:26.97 bitrate= 733.0kbits/s
  
  Buffer queue overflow, dropping.
  
  [Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
  
      Last message repeated 12 times
  
  frame=  452 fps=223 q=2.0 size=    3326kB time=00:00:35.38 bitrate= 770.1kbits/s
  
  frame=  562 fps=223 q=2.0 size=    4246kB time=00:00:43.15 bitrate= 806.0kbits/s
  
  Buffer queue overflow, dropping.
  
  [Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
  
      Last message repeated 11 times
  
  frame=  669 fps=221 q=2.0 size=    5237kB time=00:00:51.28 bitrate= 836.6kbits/s
  
  frame=  777 fps=220 q=2.0 size=    6105kB time=00:00:58.75 bitrate= 851.2kbits/s
  
  frame=  893 fps=222 q=2.0 size=    6897kB time=00:01:06.72 bitrate= 846.8kbits/s
  
  frame= 1006 fps=222 q=2.0 size=    7701kB time=00:01:14.60 bitrate= 845.6kbits/s
  
  frame= 1121 fps=223 q=2.0 size=    8539kB time=00:01:22.45 bitrate= 848.3kbits/s
  
  frame= 1235 fps=223 q=2.0 size=    9316kB time=00:01:30.39 bitrate= 844.3kbits/s
  
  frame= 1344 fps=223 q=2.0 size=   10135kB time=00:01:37.98 bitrate= 847.3kbits/s
  
  Buffer queue overflow, dropping.
  
  [Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
  
      Last message repeated 33 times
  
  frame= 1437 fps=220 q=2.0 size=   10800kB time=00:01:46.67 bitrate= 829.3kbits/s
  
  frame= 1540 fps=219 q=2.0 size=   11577kB time=00:01:54.16 bitrate= 830.7kbits/s
  
  frame= 1651 fps=219 q=2.0 size=   12330kB time=00:02:01.64 bitrate= 830.3kbits/s
  
  frame= 1756 fps=218 q=2.0 size=   13141kB time=00:02:09.06 bitrate= 834.1kbits/s
  
  frame= 1859 fps=217 q=2.0 size=   13879kB time=00:02:16.28 bitrate= 834.3kbits/s
  
  frame= 1962 fps=217 q=2.0 size=   14703kB time=00:02:23.69 bitrate= 838.2kbits/s
  
  frame= 2070 fps=217 q=2.0 size=   15448kB time=00:02:30.98 bitrate= 838.2kbits/s
  
  frame= 2176 fps=216 q=2.0 size=   16241kB time=00:02:38.46 bitrate= 839.6kbits/s
  
  Buffer queue overflow, dropping.
  
  [Parsed_overlay_4 @ 02259ae0] Buffer queue overflow, dropping.
  
      Last message repeated 20 times
  
  frame= 2275 fps=215 q=2.0 size=   16990kB time=00:02:46.78 bitrate= 834.5kbits/s
  
  frame= 2389 fps=216 q=1.6 size=   17784kB time=00:02:54.44 bitrate= 835.1kbits/s
  
  frame= 2493 fps=216 q=2.0 size=   18555kB time=00:03:01.73 bitrate= 836.4kbits/s
  
  frame= 2534 fps=216 q=2.0 Lsize=   18945kB time=00:03:04.81 bitrate= 839.7kbits/
  
  s
  
  video:18227kB audio:588kB subtitle:0 global headers:0kB muxing overhead 0.691204
  
  %

  i think -map is filter that is for the audio handling of both video.see this link.

  Superimposing two videos onto a static image ?

  Thanks in Advance.

• Blu Ray pre-encoding

  29 mai 2014, par user1122069

  I am working on authoring many Blu Ray disc images. I was wondering if there was a way to pre-encode video to MPEG-2 so that this process could run unattended overnight and over many days. I have already found that by importing the movie file on a Blu Ray image causes Toast to skip the encoding step.

  Does anyone familiar with FFMPEG and Blu Ray know what command to use ? Or suggest another free application. It should be the same as would be ready to import to a disc with remuxixing or multiplexing, etc. I can fine tune it to match the VBR settings on Toast and post the result here also if it works (saves the time to encode).

  I have about 50 1 hour videos to encode.