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• SOLVED - Compiling FFMPEG on Windows with Cywin and NDK r5

  19 mai 2012, par protectedmember

  This isn't a question - it's an answer for alll of you who have been facing the same problems as I have. I've been trying to compile this thing for a while now and I know of the numerous posts floating around the internet offering help. I have read and tried most of the suggestions and wanted to colate my success into this single post for others to benefit from.

  Since I don't have a blog, I thought it wouldn't hurt to post on here instead.

  I have managed to compile FFMPEG 0.10.3 (Freedom) on Windows 7 (32 bit) using NDK r5 and Cygwin. The steps :

  1 - Download/install Cygwin in the root of your C drive. I'm not going to give instructions on this, it's simple enough and there are plenty of tutorials on this.

  2 - Download NDK r5 from here and extract to the root of your C drive.

  3 - Download FFMPEG 0.10.3 from here and extract to the root of your C drive.

  4 - Open the file 'configure' in the root of the FFMPEG directory in a text editor.

  5 - Comment out lines 2073, 2074 and 2075.

  6 - Below 2075, add the following line :

  TMPDIR=c :/cygwin/tmp

  7 - Download this script (thankyou roman10) and place it inside your FFMPEG root directory. Rename the file to

  build_android.sh

  8 - Open the script in a text editor and edit line 17 to read

  c :/android-ndk-r5

  9 - Click start > run and type "bash" (without the speech marks) and press enter.

  10 - Type the following and press enter :

  cd /cygdrive/c/ffmpeg-0.10.3

  11 - Type the following and press enter :

  ./build_android.sh

  12 - Sit back and wait... libffmpeg.so will soon appear in your "c :\ffmpeg-0.10.3\android\" directory (where is defined in the bottom of the script from roman10's blog). The default architecture is armv7-a.

  The script from roman10's blog will actually compile quite a large shared object (.so) file. The compiler flags can be adjusted to suit your needs in the script from roman10's blog.

  I hope this helps,

  P.

• How does Chrome decide how much video to buffer for HTML5 MP4 ?

  5 mars 2015, par user3466413

  I have an MP4 video that is variable bitrate, so the average bitrate doesn’t necessarily stay consistent throughout the entire file. Because my video is a capture of a computer screen, some parts of the video are very low bitrate because nothing is happening, and other parts are a much higher bitrate because there’s a lot of activity on the screen.

  How does Chrome decide how much video to buffer for progressive download HTTP(S) videos ? I’m running into a problem where Chrome tends to buffer too little, so playback stutters.

  If there’s no way of convincing Chrome to download a certain time of video (and I don’t want to just preload the entire thing), can I author the MP4 some special way to solve the problem ? I’m using FFmpeg and MP4Box. Maybe it’s up to the HTTP server ?

• Live stream videos on YouTube with ffmpeg ?

  30 janvier 2021, par Manuservus

  What the program should do :

  


  It should download a video from an URL.

  


  Then put the video into a streaming interface (on the right side there should be the live chat from YouTube, in the middle, there should be the downloaded video).

  


  Next stream it live to YouTube.

  


  The process should repeat endless times.

  


  Download video from URL —> Stream it live to YouTube in a streaming interface -> repeat the whole process.

  


  Is this even possible in Python ? If yes how ?

  


  I would appreciate any help !

  


  PS : The stream should run smoothly without a break. That means : As soon as a video is finished, the next comes straight away.