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• xuggler on debain compiling error [closed]

  14 septembre 2012, par Marcel Colomb

  I try to install xuggler on a debian server. If I run :

  ant run-tests

  I get following Error :

   [exec] libavutil/../subdir.mak:96: warning: overriding commands for target `libavutil/'
  
   [exec] libavutil/../subdir.mak:26: warning: ignoring old commands for target `libavutil/'
  
   [exec] libavutil/../subdir.mak:96: warning: overriding commands for target `libavutil/'
  
   [exec] libavutil/../subdir.mak:96: warning: ignoring old commands for target `libavutil/'
  
   [exec] Makefile:239: /tests/fate.mak: No such file or directory
  
   [exec] Makefile:240: /tests/fate2.mak: No such file or directory
  
   [exec] Makefile:242: /tests/fate/aac.mak: No such file or directory
  
   [exec] Makefile:243: /tests/fate/als.mak: No such file or directory
  
   [exec] Makefile:244: /tests/fate/fft.mak: No such file or directory
  
   [exec] Makefile:245: /tests/fate/h264.mak: No such file or directory
  
   [exec] Makefile:246: /tests/fate/mp3.mak: No such file or directory
  
   [exec] Makefile:247: /tests/fate/vorbis.mak: No such file or directory
  
   [exec] Makefile:248: /tests/fate/vp8.mak: No such file or directory
  
   [exec] make[3]: *** No rule to make target `/tests/fate/vp8.mak'.  Stop.
  
   [exec] make[2]: *** [all-local] Error 2
  
   [exec] make[1]: *** [all-recursive] Error 1
  
   [exec] make: *** [all-recursive] Error 1
  
   [exec] make[3]: Leaving directory `/usr/local/xuggle-xuggler/build/native/x86_64-unknown-linux-gnu/captive/ffmpeg/csrc'
  
   [exec] make[2]: Leaving directory `/usr/local/xuggle-xuggler/build/native/x86_64-unknown-linux-gnu/captive/ffmpeg'
  
   [exec] make[1]: Leaving directory `/usr/local/xuggle-xuggler/build/native/x86_64-unknown-linux-gnu/captive'

  Is someone having the same issue and solved it ? Thank you

• Can the outputFile of MediaRecorder be a named pipe ?

  13 avril 2017, par Harrison

  Following
  Android Camera Capture using FFmpeg
  and
  feed raw yuv frame to ffmpeg with timestamp

  I successfully put raw frames of Android phone camera into a named pipe made by mkfifo, and used ffmpeg to process them and generated a video file.

  But the problem is that by ffmpeg, the encoding is very slow, it can only process 3 5 frames per second. The reason I have to use ffmpeg instead of MediaRecorder is that later I need to use ffmpeg to generate HLS segments and m3u8 file.

  So I have to turn to use native encoder like MediaRecorder and try to set its OutputFile to a named pipe following
  How to use unix pipes in Android

  My code likes this,

  private String pipe = "/data/data/com.example/v_pipe1";
  
  ...
  
  mMediaRecorder.setOutputFile(pipe);
  
  ...
  
  mMediaRecorder.start();

  Also I have a ffmpeg thread to use this pipe as the input.

  But when I call mMediaRecorder.start() ; It will throw java.lang.IllegalStateException. I’ve tried to put ffmpeg thread before or after calling mMediaRecorder.start(), but with the same error.

  I have no idea about this now. Could someone tell me how to solve this ?
  Any suggestions are welcome and appreciated. Thanks.

• FFmpeg slideshow with each only image only once

  5 décembre 2017, par magic_al

  I’ve created a slideshow from a couple of .jpg images using concat and the following input file.

  file '/tmp/tmpBlRyrb/images/0001.jpg'
  
  duration 5
  
  file '/tmp/tmpBlRyrb/images/0002.jpg'
  
  duration 8
  
  file '/tmp/tmpBlRyrb/images/0003.jpg'
  
  duration 3
  
  file '/tmp/tmpBlRyrb/images/0004.jpg'
  
  duration 3
  
  file '/tmp/tmpBlRyrb/images/0005.jpg'
  
  duration 8
  
  file '/tmp/tmpBlRyrb/images/0006.jpg'
  
  duration 3
  
  file '/tmp/tmpBlRyrb/images/0007.jpg'
  
  duration 14
  
  file '/tmp/tmpBlRyrb/images/0008.jpg'
  
  duration 14
  
  file '/tmp/tmpBlRyrb/images/0009.jpg'
  
  duration 18
  
  file '/tmp/tmpBlRyrb/images/0009.jpg'

  I set vsync to passthrough in order to only include each image once and therefore limit the resulting video size. I also tried cfr resulting in a much larger video since the frames are duplicated.

  So I ended up with the following command :

  ./ffmpeg -f concat -safe 0 -i /tmp/tmpBlRyrb/durations.txt -vsync 2 -vcodec copy video.mp4

  The resulting video works fine in Ubuntus’ Totem video player. However, I experience a bunch of different problems depending on the container format (I tried mp4, mkv, avi and mov) in other video players.

  On Ubuntu/vlc I cannot jump through the video or it just dosn’t play at all. Same goes for Mac/vlc. Mac/quicktime won’t open the videos at all. My android phone hangs completely and I’ve to restart it.

  How can I create a slideshow from images which include each image only once in order to limit the file size of the video and make sure that it plays in all players/on all devices using FFmpeg ?