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• FFmpeg can't run in some device Android

  30 mars 2016, par tqn

  i’m working in a video processing project and now i’m using ffmpeg library in Android. I’m facing with a strange problem with asus zenphone 4 t00l (or all x86 device, I’ve just test in this x86 phone). When start command in project, app always crash :

  03-30 15:08:18.461 21068-21068/com.paditech.videa I/FFmpeg: Loading FFmpeg for armv7-neon CPU
  
  03-30 15:08:18.781 21068-21068/com.paditech.videa I/System.out: Success........
  
  03-30 15:26:12.933 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 59
  
  03-30 15:26:12.933 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 63
  
  03-30 15:26:15.913 21068-21068/com.paditech.videa D/VideoActivity: onDestroy
  
  03-30 15:26:18.993 21068-21068/com.paditech.videa I/FFmpeg: Loading FFmpeg for armv7-neon CPU
  
  03-30 15:26:19.263 21068-21068/com.paditech.videa I/System.out: Success........
  
  03-30 15:26:42.583 21068-21184/com.paditech.videa D/FFmpeg: Running publishing updates method
  
  03-30 15:26:42.583 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 59
  
  03-30 15:26:42.583 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 85
  
  03-30 15:26:42.683 21068-21068/com.paditech.videa D/VideoActivity: /data/data/com.paditech.videa/files/ffmpeg[1]: syntax error: '-�-4�' unexpected
  
  03-30 15:26:42.683 21068-21068/com.paditech.videa D/VideoActivity: /data/data/com.paditech.videa/files/ffmpeg[1]: syntax error: '-�-4�' unexpected

  First, I think the problem is ffmpeg library. So I created a test module with simple activity just load and run command and there’re no problem.

  Second, I’m afraid that app cannot load version ffmpeg, because in my log, it’s armv7-neon althought it’s x86 (In my test module, it display x86). And according my search result, may be a external library make app to use abi arm (Build.CPU_API="armv7"). So I try remove all library in gradle in module Test and detected a library. But check in aar file of library, it support all x86 and arm. But after remove it, app still crash with same log. And strangely, althogh Test module register as arm but it’still run success (External question : Why add library jp.wasabeef:picasso-transformations make system register as armv7 although it’s x86)

  Finally, i think problem is command. But after debug, I use same command for Test module but it still success. Now i’m still stuck with it. Could anyone help me to solve it. Thanks. Here my demo code :

      String input = "/storage/emulated/0/Videa/Video/VIDEO_20160122_160020.mp4";
  
      String output = "/storage/emulated/0/Videa/Audio/AUDIO_20160330_142501.wav";
  
      String[] command = {
  
              "-y",
  
              "-i",
  
              input,
  
              "-vn",
  
              "-f",
  
              "wav",
  
              output
  
      };
  
      FFmpeg ffmpeg = FFmpeg.getInstance(getApplicationContext());
  
      try {
  
          ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
  
  
              @Override
  
              public void onSuccess(String message) {
  
                  super.onSuccess(message);
  
                  System.out.println("Success " + message);
  
              }
  
  
  
              @Override
  
              public void onFailure(String message) {
  
                  super.onFailure(message);
  
                  System.out.println("Failure " + message);
  
              }
  
          });
  
      } catch (Exception e) {
  
          e.printStackTrace();
  
      }

  And here is Failed command :

      ArrayList<string> cmd = new ArrayList<string>();
  
      cmd.add("-y");
  
      cmd.add("-i");
  
      cmd.add(input);
  
      cmd.add("-vn");
  
      cmd.add("-f");
  
      cmd.add("wav");
  
      cmd.add(output);
  
      String[] result = new String[cmd.size()];
  
      return cmd.toArray(result);
  
  </string></string>

• Webcam - Publishing and Archiving on line video files

  11 novembre 2014, par Emmanuel Brunet

  I want to publish an ASF live video stream over the internet and also copy the backup to disk (without sound to spare disk space)

  I’m running debian 7.7 wheezy / ffmpeg 2.2 and ffserver 1.2.9.

  ---

  The IP camera video streams specifications are

  Input #0, asf, from 'http://account:password@webcam/videostream.asf':
  
    Duration: N/A, start: 0.000000, bitrate: 32 kb/s
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc), 640x480, 50 tbr, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: adpcm_ima_wav ([17][0][0][0] / 0x0011), 8000 Hz, 1 channels, s16p, 32 kb/s

  To achieve this I have set up a /etc/ffserver.conf configuration

  Port 11000
  
  
  
  BindAddress 0.0.0.0
  
  
  
  MaxClients 1000
  
  
  
  MaxBandwidth 40000
  
  
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 200K
  
  ACL allow localhost
  
  ACL allow 192.168.1.1 192.168.255.255
  
  
  
  </feed>
  
  
  
  
  
  # --------------------------- ASF ----------------------
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format asf
  
  
  
  AVOptionVideo flags +global_header
  
  VideoFrameRate 25
  
  VideoSize 640x480
  
  VideoBitRate 1024
  
  VideoBufferSize 1024
  
  StartSendOnKey
  
  NoAudio
  
  </stream>
  
  
  
  # ------------ Server status -------------------
  
  
  
  <stream>
  
  Format status
  
  
  
  # Only allow local people to get the status
  
  ACL allow localhost
  
  ACL allow 192.168.0.0 192.168.255.255
  
  
  
  #FaviconURL http://pond1.gladstonefamily.net:8080/favicon.ico
  
  </stream>
  
  
  
  
  
  # ---------- Redirect --------------------
  
  
  
  <redirect>
  
  URL http://www.ffmpeg.org/
  
  </redirect>

  To connect the feed I run

  to start the ffserver

  ffserver -f /etc/ffserver.conf

  to collect the stream from the camera

  ffmpeg -i http://account:password@webcam/videostream.asf -c:v libx264 -an http://localhost:11000/feed1.ffm

  and all works like a charm.

  ---

  My questions are :

  • How in the same time having the stream saved to disk ?

  (as done by the command)

  ffmpeg -i http://account:password@webcam/videostream.asf -preset veryfast -t 00:60:00 -b:v 512K -c:v libx264 -pix_fmt yuv420p -an /var/backup/videos/YYY-MM-DD.mp4

  Note that the output .mp4 file names should rotate to get multiple timestamped output archives

  • How can I published video over RTSP ?

  I’ve found examples on the internet but none worked for me

  Thanks in advance

  regards

• avdevice/xcbgrab : don't assume xserver endianness

  31 janvier 2021, par Andriy Gelman

  avdevice/xcbgrab : don't assume xserver endianness
  xserver defines the endianness of the grabbed images. Use this information
  
  to set the correct pixel format.
  This also fixes format selection in configuration depth=32/bpp=32 with
  
  xserver on a little endian machine. Before the patch, the big endian
  
  layout 0RGB was always selected which is incorrect because BGR0 should
  
  be used. RGB24 was also incorrectly assumed (but this format was removed
  
  in xserver 1.20).
  The big-endian settings can be tested using docker+qemu from a little-endian
  
  machine :
  $ docker run —rm —privileged multiarch/qemu-user-static —reset -p yes
  
  $ docker run —rm -it -v /tmp :/tmp powerpc64/debian /bin/bash
  In docker container
  
  $ apt-get update
  
  $ apt-get install xvfb
  
  $ apt-get install x11-apps
  To test AV_PIX_FMT_0RGB32
  
  $ Xvfb :2 -screen 0 720x480x24 &
  
  $ export DISPLAY=:2
  
  $ xclock -geometry 720x480 -bg green #test different colors
  On your host machine grab the frames using the following
  
  command. View output to check that colors are rendered correctly
  
  $ ./ffmpeg -y -f x11grab -i :2.0 -codec:v mpeg2video out.mp4
  Other pixel formats can be tested by modifying how Xvfb is started in the docker
  
  container :
  AV_PIX_FMT_RGB565
  
  $ Xvfb :2 -screen 0 720x480x16
  AV_PIX_FMT_RGB555
  
  $ Xvfb :2 -screen 0 720x480x15
  AV_PIX_FMT_BGR24 / AV_PIX_FMT_RGB24
  
  This is difficult to test because bpp=24 support was removed in xserver 1.20
  
  https://lists.x.org/archives/xorg-devel/2018-February/056175.html?hmsr=joyk.com&utm_source=joyk.com&utm_medium=referral
  
  However, I was able to run previous version of Xvfb (with some
  
  modifications to force 24bpp) to check that images are rendered correctly.
  Reviewed-by : Carl Eugen Hoyos <ceffmpeg@gmail.com>
  
  Signed-off-by : Andriy Gelman <andriy.gelman@gmail.com>
  

  • [DH] libavdevice/xcbgrab.c