QtAV is a media playing library based on Qt and FFmpeg. It can help you to write a player with less effort than ever before.
QtAV has been added to FFmpeg projects page http://ffmpeg.org/projects.html
QtAV is free software licensed under the term of LGPL v2.1. If you use QtAV or its constituent libraries, you must adhere to the terms of the license in question.
QtAV can meet your most demands
- Seek, pause/resume
- Video capture
- Aspect ratio
- Transform video using GraphicsItemRenderer. (rotate, shear, etc)
- Playing frame by frame (currently support forward playing)
- Playing speed control. At any speed.
- Variant streams: locale file, http, rtsp, etc.
- Playing music
- Choose audio channel
- Volume control
- Fullscreen, stay on top
- Compatiblity: QtAV can be built with both Qt4 and Qt5. QtAV supports both FFmpeg(>=0.9) and Libav.
- Multiple render engine support. Currently supports QPainter, GDI+, Direct2D, XV and OpenGL(and ES2).
- Dynamically change render engine when playing.
Extensible Framework (work in progress)
QtAV currently uses FFmpeg to decode video, convert image and audio data, and uses PortAudio to play sound. Every part in QtAV is designed to be extensible. For example, you can write your audio output class using OpenAL, image converting class using cuda to get better performance etc. These features will be added in the feature by default.
- FFmpeg (>=0.9)Latest version is recommanded.
or Libav (>=0.8) Latest version is recommanded.
The required development files for MinGW can be found in sourceforge page: depends
You can build QtAV with many compilers and on many platforms. You can use gcc, clang, vc to compile it.
See the wiki Build QtAV
Here is a brief guide:
It's recommend not to build in source dir.
cd your_build_dir qmake QtAV_project_dir/QtAV.pro make
qmake will run check the required libraries at the first time, so you must make sure those libraries can be found by compiler.
Then qmake will create a cache file .qmake.cache in your build dir. Cache file stores the check results, for example, whether portaudio is available. If you want to recheck, run
qmake QtAV_project_dir/QtAV.pro -config recheck
WARNING: If you are in windows mingw with sh.exe environment, you may need run qmake twice.
How To Write a Player
Wrtie a media player using QtAV is quite easy.
WidgetRenderer renderer; renderer.show(); AVPlayer player; player.setRenderer(&renderer); player.play("test.avi");
For more detail to using QtAV, see the wiki Use QtAV In Your Project or examples.
For End Users
An simple player can be found in examples. The command line options is
player [-vo qt|gl|d2d|gdi|xv] [url/path]
You can choose a paint engine with -vo option. For example, in windows that support Direct2D, you can run
player -vo d2d filename
The default is Qt's paint engine.
- Double click: fullscreen switch
- Ctrl+O: open a file
- Space: pause/continue
- F: fullscreen on/off
- I: switch display quality
- T: stays on top on/off
- N: show next frame. Continue the playing by pressing "Space"
- O: OSD
- P: replay
- Q/ESC: quit
- S: stop
- R: switch aspect ratio
- M: mute on/off
- Up / Down: volume + / -
- Ctrl+Up/Down: speed + / -
- -> / <-: seek forward / backward
- Drag and drop a media file to player
The default behavior can be replaced by subclassing QObject and call
void AVPlayer::setPlayerEventFilter(QObject *obj) (use null to disable).
- Component framework
- Filters: filter api. integrate all filters in libavfilter.
- Hardware acceleration using DirectX, NVIDIA Cuda, ATI UVD, Intel IPP, OpenCL and OpenGL:
- decoding: DXVA, XvBA, cuvid, VAAPI
- image, audio and text filters
- rendering: DirectX
- Stylish GUI based on Qt Graphics View Framework
- Document and SDK
- Other: better sync method and seeking, tests, playing statistics, etc.
- Region of interest support.
- More platform support. Maemo, Android, iOS, BB10 etc. Depends on Qt and FFmpeg for those platforms.
- ppa, debian package etc.
- QML support (beginning)
QtAV on Win8
QtAV on Mac OS X
IP camera using QtAV. OS: Fedora 18 (some developers from Italy http://www.selcomsrl.eu/)
Rotate a video item
Copyright © Wang Bin firstname.lastname@example.org
Shanghai University, Shanghai, China