Brought to you by Headjack
FFmpeg is one of the most powerful tools for video transcoding and manipulation, but it's fairly complex and confusing to use. That's why I decided to create this cheat sheet which shows some of the most often used commands.
Let's start with some basics:
ffmpeg calls the FFmpeg application in the command line window, could also be the full path to the FFmpeg binary or .exe file| use rvtypes; | |
| use app_utils; | |
| use commands; | |
| use extra_commands; | |
| use rvui; | |
| require math; | |
| require io; | |
| require qt; | |
| require system; |
| def root_settings_to_string(root): | |
| """Serialise the project settings. Used when writing the selected | |
| nodes (otherwise things like the frame range would be lost) | |
| """ | |
| # Write non-default settings, in .nk script format. Also write | |
| # user-knob definitons to avoid errors like NUKE-256 | |
| rootstring = root.writeKnobs(nuke.TO_SCRIPT | nuke.WRITE_USER_KNOB_DEFS) | |
| # TODO: Why doesn't writeKnobs write [first/last]_frame? Also |
| from PySide import QtGui, QtCore | |
| def findDagWidget(): | |
| stack = QtGui.QApplication.topLevelWidgets() | |
| while stack: | |
| widget = stack.pop() | |
| if widget.windowTitle() == 'Node Graph': | |
| # You should probably be a little safer with this return, but the actual DAG widget | |
| # seems to be here consistently... if not, it should be the only child of 'widget' |
| """Test of finding Nuke's viewer widget, and intercepting the hardwired "c" shortcut and rewiring it to view the RGB channel | |
| """ | |
| from PySide import QtGui, QtCore | |
| def findviewer(): | |
| stack = QtGui.QApplication.topLevelWidgets() | |
| viewers = [] | |
| while stack: |
| #!/bin/bash | |
| #Download Maya from here: http://download.autodesk.com/us/support/files/maya_2016_service_pack_6/Autodesk_Maya_2016_SP6_EN_Linux_64bit.tgz | |
| #Get a student License from: http://www.autodesk.com/education/free-software/maya | |
| #Log in and select maya 2016, your language and an OS. Either should work. | |
| # !!!!!! IMPORTANT !!!!!! | |
| # BEFORE RUNNING, REPLACE "USER" AND "HOME" AT THE BOTTOM OF THIS SCRIPT WITH YOUR USERNAME AND HOME FOLDER | |
| # !!!!!! IMPORTANT !!!!!! |
| import PySide.QtCore as QtCore | |
| import PySide.QtGui as QtGui | |
| from nukescripts import panels | |
| class PanelTest(QtGui.QWidget): | |
| def __init__(self, parent=None): | |
| QtGui.QWidget.__init__(self, parent) | |
| self.setLayout(QtGui.QVBoxLayout()) | |
| self.myTable = QtGui.QTableWidget() | |
| self.myTable.header = ['Date', 'Files', 'Size', 'Path' ] |
| #![no_std] | |
| #![no_main] | |
| use cortex_m::peripheral; | |
| use cortex_m_rt::entry; | |
| use panic_halt as _; | |
| use stm32f3xx_hal::{pac, delay, prelude::*}; | |
| #[entry] | |
| fn main() -> ! { |
ffmpeg -hide_banner -i input -c:v hevc_nvenc -preset hq -rc constqp -global_quality 21 -c:a libfdk_aac -ar:a 48000 -channel_layout:a 5.1 -ab:a 640k output
ffmpeg -hide_banner -i input -c:v hevc_nvenc -preset hq -rc vbr_hq -b:v 30000k -qmin 17 -qmax 21 -c:a libfdk_aac -ar:a 48000 -channel_layout:a 5.1 -ab:a 640k output
| """ | |
| RGB to XYZ gamut-remapping matrix calculation. | |
| Main function is rgb_to_xyz_matrix. | |
| """ | |
| class MatrixError(Exception): | |
| pass | |
| class NonInvertableMatrix(MatrixError): |
