Recherche avancée

Sur d’autres sites (9091)

• avformat/matroskaenc : use display aspect ratio for DisplayWidth and DisplayHeight...

  22 octobre 2016, par James Almer

  avformat/matroskaenc : use display aspect ratio for DisplayWidth and DisplayHeight when possible
  This avoids potential rounding errors and guarantees the source aspect
  
  ratio is preserved.
  
  Keep writing pixel values when Stereo 3D Mode is enabled and for WebM,
  
  as the format doesn’t support anything else.
  This fixes ticket #5743, implementing the suggestion from ticket #5903.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavformat/matroskaenc.c

• In Android, how can I display mp4 files captured by Android itself without having "sorry this video cannot be played" trouble ?

  31 octobre 2013, par fercis

  I am new in Android and have an application as follows :

  1) I record videos by my phone (Samsung Galaxy Note 2).
  2) I send video files (mp4) to a cloud (Dropbox in my example) without any change in encoding. And store the URL of the sent video on the cloud.

  And when the application is in view video mode,
  3) I want to view the videos with the URL (which may be captured by other client Applications) in videoview.

  I cannot view the videos that are captured by the phone itself. There are many discussions in SO about the encoding compatibility (H 263, H 264 etc.).

  Video recoding with ffmpeg

  However, I could not manage to find a way to CHANGE the encoding of the video to be recorded by the application. Camera.Parameters class has the encoding information only for pictures. The quality is not important, I only want to capture videos which can be directly played in the same Android application without any change.

• Using Qt Media Player on Raspberry Pi 1

  18 mai 2015, par Mauker

  I have a project built using Qt5 which has to play a video. Just like in the videowidget sample code.

  I’ve followed these instructions to build qt5 on my Pi. And it went just fine. But when I try to run any qt program that uses QMediaPlayer, I get the error message :

  defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"

  Which means I don’t have a backend to play the video, right ? Is there any one that I can use which will with Qt, like ffmpeg ? And how can I get it to work ? Specially for h264 videos.

  I’ve tried to install gstreamer as is told on this link, but it’s not working. Will I have to rebuild the entire qt5 again ?

  P.S. : I have the raspberry pi 1 model B with raspbian installed.

  Edit : As mentioned by Greenflow, I checked the ./configure log and saw that the GStreamer was compiled in, but the video apps are still not working...

  The message on the log was like this :

  GStreamer .............. yes (0.10)

  And the message on Greenflow’s log was like this :

  GStreamer .............. yes (1.0)

  Clearly it’s another version of GStreamer, but is it the problem ?

  I’ve also found this post which says QtMultimedia on the Pi is rather useless, but the post is from 2013, so I’m not sure if it’s really relevant. I’d like to have this app playing hardware accelerated videos on my Raspberry Pi, but I’m almost dropping the idea.

  Anyways, thanks Greenflow for the head start.

  Edit 2 : Found this thread on the Qtcentre. Damn, this thing is not going to be easy to solve, I guess...