diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/video_thread.py | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/src/video_thread.py b/src/video_thread.py index 47afe35..5123f9a 100644 --- a/src/video_thread.py +++ b/src/video_thread.py @@ -73,7 +73,9 @@ class Worker(QtCore.QObject): return ffmpegCommand def determineAudioLength(self): - '''Returns longest audio length of loaded components, or False if failure occurs''' + ''' + Returns audio length which determines length of final video, or False if failure occurs + ''' if any([ True if 'pcm' in comp.properties() else False for comp in self.components @@ -96,6 +98,10 @@ class Worker(QtCore.QObject): return duration def preFrameRender(self): + ''' + Initializes components that need to pre-compute stuff. + Also prerenders "static" components like text and merges them if possible + ''' self.staticComponents = {} # Call preFrameRender on each component @@ -180,10 +186,8 @@ class Worker(QtCore.QObject): def frameRender(self, audioI): ''' - Grabs audio data indices at frames to export, from compositeQueue. - Sends it to the components' frameRender methods in layer order - to create subframes & composite them into the final frame. - The resulting frames are collected in the renderQueue + Renders a frame composited together from the framse returned by each component + audioI is a multiple of self.sampleSize, which can be divided to determine frameNo ''' def err(): self.closePipe() @@ -225,9 +229,8 @@ class Worker(QtCore.QObject): def showPreview(self, frame): ''' - Receives a final frame that will be piped to FFmpeg, - adds it to the checkerboard and emits a final QImage - to the MainWindow for the live preview + Receives a final frame that will be piped to FFmpeg, + adds it to the MainWindow for the live preview ''' # We must store a reference to this QImage # or else Qt will garbage-collect it on the C++ side @@ -236,6 +239,16 @@ class Worker(QtCore.QObject): @pyqtSlot() def createVideo(self): + ''' + 1. Numpy is set to ignore division errors during this method + 2. Determine length of final video + 3. Call preFrameRender on each component + 4. Create the main FFmpeg command + 5. Open the out_pipe to FFmpeg process + 6. Iterate over the audio data array and call frameRender on the components to get frames + 7. Close the out_pipe + 8. Call postFrameRender on each component + ''' log.debug("Video worker received signal to createVideo") log.debug( 'Video thread id: {}'.format(int(QtCore.QThread.currentThreadId()))) @@ -315,6 +328,9 @@ class Worker(QtCore.QObject): "Exporting video: %s%%" % str(int(progressBarValue)) ) + # =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~==~=~=~=~=~=~=~=~=~=~=~=~=~=~ + # Finished creating the video! + # =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~==~=~=~=~=~=~=~=~=~=~=~=~=~=~ numpy.seterr(all='print') |