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• Is anyone willing to join a GTK+3 project started in 2009 and still active ?

  15 mars 2020, par GiuTor

  first of all if my question is not relevant to stackoverflow website please delete it, I apologize in advance.

  I started Imagination, a DVD slideshow maker developed with GTK+2 in 2009. Along the years users have contributed with few patches. The software was ported to GTK+3 last year. Imagination works by using Cairo to paint the transition on a GTK drawing area and ffmpeg run in the background to encode the video. I’m currently getting rid of ffmpeg and using libav to encode the video.

  Does anybody want to help with libav coding ? The software is available through SVN :

  svn co https://svn.code.sf.net/p/imagination/code/trunk imagination

  The web site is hosted at sourceforge : http://imagination.sourceforge.net/

  Thanks :)

• MP4 moof fragment headers

  23 juillet 2019, par Ariana

  I have a MP4 parser software that get’s a fragmented .mp4 video, parses the MOOV and fragment headers and streams it. I have generated a .mp4 file myself using FFMPEG and MP4Box/bento4, but the software has problems processing it.

  ffmpeg -i input.mp4 -g 25 -c:v libx264 -c:a copy out1.mp4
  
  
  
  mp4fragment out1.mp4 --fragment-duration 1000 --track 'video' output.mp4

  Using the MP4 Explorer software, I noticed in my generated .mp4 file, for all moof.traf.trun, sample duration is set to 0, but in the Track Fragment Header box, it sets the default_sample_duration to 512. While in the another .mp4 file which works fine, there is no default_sample_duration field, but each individual sample has a duration of size 512. Looks like this might cause the problem. The right figure shows the working mp4, and the left one is my generated mp4.

  Is this an update in the newer versions of FFMPEG (or MP4Box or bento4) ? Is there any ways to force setting the sample duration in samples ?

  My .mp4 file

  The working .mp4 file

  

• How to play video through framebuffer device and audio through pulseaudio (simultaneously)

  5 août 2019, par waterj

  I have a video/audio file called test_video.mp4 that I want the video component of to stream to /dev/fb0 and the audio component of to stream to pulseaudio using ffmpeg. This is so that I can play the file on a piece of custom hardware running Alpine through an HDMI connection to a monitor with speakers.

  I know this is pretty bad, but I wiped the virtual machine I tried doing this on, so I don’t have a record of the commands I’ve tried. I’m open to any and all suggestions, though !