1.10.0 Release Note

Changelog

• Improve seek speed, fix drop too much frames after seek
• VideoFrameExtractor: seek faster if called many times. Speed up progress bar preview
• Support media files from android assets. Use protocol ‘assets:’
• Apply video decoder options when playing
• Better iOS support
• VideoToolbox:
  • Check profile to avoid crash
  • Support RGB output
  • Use rgb422_apple texture
  • Support iOS 0-copy rendering using OpenGLES
  • More interop types for OSX and iOS
• OpenGL
  • Use 16bit depth textures for >8bit videos (e.g. 10bit) if possible
  • Correct input/output color range. This fixes QtAV video different from other players
  • Fix high opengl and core profile rendering
  • Better EGL detection
• VO:
  • Simplify signal emitting
  • Support background color, simplify background painting
  • VideoOutput delete crash, resize issues
  • Improve performance of QPainter based renderers
• AudioOutput:
  • remove setBufferSize, add a better API setBufferSamples
  • Add flush(), clear(). Not implemented for backends.
  • Fix OpenAL playback for some audio formats
  • Dynamic load OpenAL by default except iOS
  • Add AudioToolbox support for OSX/iOS and becomes the default backend
  • PulseAudio: workaround noise for multiple instance
• Subtitle:
  • Support ass font files in android assets
  • Fix srt decoding
• QML:
  • Add QtMultimedia compatible APIs VideoOutput.contentRect/sourceRect
• Simplify SurfaceType
• Fix strange behaviors near eof: seek, stepForward, exit etc.
• Fix playback block if audio duration is shorter than video
• VideoFrame constructed from QImage takes image’s ownership
• Add VideoFrame.colorRange, AudioFrame.duration
• encoder: support start time
• Add AVPlayer.bufferSpeed, seekFinished(qint64)
• Fix abort when loading
• Examples:
  • Fix videos in videowall not synchronized
  • QMLPlayer has better touch screen experience
  • QMLPlayer supports win10 store (But Qt is not well supported)
  • Drag & Drop support on OSX
  • URL open dialog for QMLPlayer

iOS Support

QtAV supports VideoToolbox for iOS. The decoding part is done by avcodec. What QtAV do is rendering the decoded frames. In this version, a new property interop is introduced in VideoToolbox decoder. It can be CVPixelBuffer, CVOpenGLES, IOSurface and Auto. CVPixelBuffer supports both iOS and OSX because it simply upload the frame plane data to textures, but data copy happened. CVOpenGLES is used by iOS and IOSurface is for OSX. No data copy. So it’s faster than CVPixelBuffer. But there are some bugs that the rendering can fail when switching from sw decoder to VideoToolbox 0-copy mode, or toggling 0-copy mode.