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• Compiling ffmpeg for android using cygwin-x86

  11 mai 2015, par VEP10

  I’d like to test ijkplayer (android) project.
  During compiling ffmpeg libs (./compile-ffmpeg.sh) usin Cygwin in WIN7 environment I faced the following error message :

  "build on CYGWIN_NT-6.1 x86_64
  Host system ’cygwin-x86’ is not supported by the source NDK !
  Try —system= with one of : windows-x86_64"

  The suggested ’system’ command doesn’t solve the problem.
  Axtually I use android-ndk-r10c

  If I try the same process using MINGW32 I get a lot of syntax error.
  Please help !

• FFmpeg mp4 encoder for android html

  24 mai 2017, par Dell Watson

  Hello I’m trying to put video .mp4 auto-captured by my webcam using ffmpeg into HTML, and then activated my localhost so my android could see it.

  the video in my android WAS ABLE to play BUT it’s all white and pixels error, so it’s a fail.

  I thought because android has difference surface because in my desktop it runs perfectly, then i keep searching and trying with ogv/webm.

  In the end, I just use a downloaded mp4 and it runs perfectly tho.
  now I think the problem was coming from my mp4-webcam created by ffmpeg(run in cmd)

  I compare a mp4-webcam vs mp4-downloaded

  5sec vs 1min,

  Data-rate : 16477kbps vs 613kbps

  framerate : 30frm/s vs 23frm/s

  size : 9MB vs 5 MB

  even tho it’s only 5sec video by webcam, it still has larger data than a 1min video-downloaded maybe it was because without conversion.

  but the question, is that the reason of the problem ? android-html(google chrome) wasn’t able to display and make a dead pixels since in desktop it runs. it shouldn’t be the problem right ?

  I really need to transfer webcam-record into android-surface (my web-app).

  I have no idea to fix it, any advice ? I’ve been searching a lot. Maybe there was another problem I do not know yet.

  EDIT : my cmd ffmpeg run : ffmpeg -y -f v4l2 -i /dev/video1 -codec:v libx264 -qp 0 -t 0:00:05 hss.mp4

  EDIT 2 : my 2nd thought because ffmpeg encoder that I used(libx264) isnot support for android. but i still no idea

• Integrate the FFMPEG in android

  12 juillet 2016, par John Smith

  I’m trying to integrate FFMPEG into my android app(I am trying to implement a video cropper), I was following the steps from an Kevin Law’s answer here :

  quora question

  I have downloaded the android ndk.
  In the step two it says I should modify the package name which I did.
  It also says that I should modify the flags for codecs I’m interested in.
  So my first question is

  1. Which codecs would I need to work with mp4, 3gp and maybe avi files in android ?

  I tried to leave everything by default and build with build.sh script but it fails on the line where I have changed the package name

      FLAGS="$FLAGS --soname-prefix=/data/data/cropit.dassem.com.videocropper/lib/"

  with

  Unknown option "--soname-prefix=/data/data/cropit.dassem.com.videocropper/lib/".
  
  See ./configure --help for available options.

  2. Now is there anyone familiar with FFMPEG integration and sees something that I have missed ?

  I do not want to use the pre-compiled FFMPEG libraries because they are really big, the ones I found take around 15 MB of space. I’ve read somewhere that if i’ll compile and integrate FFMPEG myself it will be much smaller.

  3. Are there any easier ways of cropping video on android ?

  Maybe there is no point in dealing with this, which proves quite a pain I must admit, and there is an easier solution available ?