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wang-bin 14ba2f85c5 version 1.5.0 2015-02-13

Changelog:
- Add QtAVWidgets module contains widget based renderers, video preview
widget
- QtAV module only depends on QtCore and QtGui
- Improve audio output API
- Simplify deployment on OSX. Deploy sdk from release packages without
build.
- Improve seekable detection
- Fix noise audio if volume increased
- Fix noise and wrong playback speed for wmv videos
- Preview is more accurate
- Do not copy AVPacket but use reference count.
- Faster audio track switch
- Reopen audio output only if audio format changed
- VideoFrame: new API for converting to another format or QImage
- OpenGL VAO, VBO support.
- QML
  * Fix some crashes in QQuickItemRenderer
  * Add FBO item renderer and use the same code path as other opengl
renderers
  * timeout property
- player and QMLPlayer example
  * player: real time preview on progress bar
  * Fast seek and display if seek shortcut is pressed and hold

2015-02-14 03:16:14 +08:00

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Since QtAV 1.3.1, you can configure how to build QtAV in a easier way.

When running qmake, qmake will do some tests to check the building environment and the features can be enabled. The default behavior is to check all the features in both $$EssentialDepends and $$OptionalDepends(see QtAV.pro) and to build all parts in source tree including examples, tests. Now you can simply select what you want to check and build using a user.conf in QtAV source directory.

Disable Features Manually

Currently features in $$EssentialDepends will always be checked: avutil, avcodec, avformat, swscale, swresample, avresample, gl. Features in $$OptionalDepends will also be checked by default.

Features in $$OptionalDepends can be disabled by adding a CONFIG value in QtAV_SRC_DIR/user.conf(create it if not exists). For example, to disable vaapi, just add:

CONFIG += no-vaapi

All options available are: no-openal, no-portaudio, no-direct2d, no-gdiplus, no-dxva, no-xv, no-vaapi, no-cedarv.

Disable config.tests

config.tests will check what features QtAV can support. It may takes a few seconds. Some you may skip these checking to save time. You can add

CONFIG += no_config_tests

in QtAV_SRC/user.conf to disable it then qmake will be faster. But you then must enable the features you want manually in user.conf. All features available are $$OptionalDepends. For example, to enable avresample, add

CONFIG += config_avresample

in user.conf.

Link Against Static FFmpeg

It is supported since 1.4.2. You can add CONFIG += static_ffmpeg in QTAV_BUILD_DIR/.qmake.cache. Additional link flags will be added. Only ffmpeg build with QtAV/script/build_ffmpeg.sh is tested.

Old GLibc Compatibility

QtAV built from a newer linux system like ubuntu 14.04 may not work on old system like ubuntu 12.04 because of some symbols is missing. For example, clock_get_time is in glibc>=2.17 and librt. An convenience option is added since 1.4.2. Just add CONFIG += glibc_compat in QTAV_BUILD_DIR/.qmake.cache

TODO

more flexible configuration, such as build path, blablabla.

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