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What do you need to know about the FFmpeg scaler?
The FFmpeg rescaler provides a high-level interface to the libswscale library image conversion utilities. In particular it allows one to perform image rescaling and pixel format conversion. 2 Scaler Options The video scaler supports the following named options.
Can you use ffmpeg to decode with VAAPI?
FFMPEG does not currently (as of 10-01-2014) support encoding with the VAAPI. It currently only supports decoding with VAAPI. Update 2020: FFMPEG now supports fully supports VAAPI.
How to create a global device in FFmpeg?
In ffmpeg, a named global device can be created using the -init_hw_device option: With the decode hwaccel, each input stream can then be given a previously initialised device with the -hwaccel_device option: ffmpeg -init_hw_device vaapi=foo:/dev/dri/renderD128 -hwaccel vaapi -hwaccel_device foo -i
Which is the bicubic scaling algorithm in FFmpeg?
Select bilinear scaling algorithm. Select bicubic scaling algorithm. Select experimental scaling algorithm. Select nearest neighbor rescaling algorithm. Select averaging area rescaling algorithm. Select bicubic scaling algorithm for the luma component, bilinear for chroma components. Select Gaussian rescaling algorithm.
How does the aspect ratio work in FFmpeg?
Most processing filters in FFmpeg handle the aspect ratio to avoid stretching the image: cropping adjusts the DAR to keep the SAR constant, scaling adjusts the SAR to keep the DAR constant. If you want to stretch, or “unstretch”, the image, you need to override the information with the setdar or setsar filters.
Is the container format supported by FFmpeg 1.3?
1.3 I cannot read this file although this format seems to be supported by ffmpeg. Even if ffmpeg can read the container format, it may not support all its codecs. Please consult the supported codec list in the ffmpeg documentation. 1.4 Which codecs are supported by Windows?
Can a DLL loader read a FFmpeg file?
Moreover FFmpeg strives to support all codecs natively. A DLL loader is not conducive to that goal. 1.3 I cannot read this file although this format seems to be supported by ffmpeg. Even if ffmpeg can read the container format, it may not support all its codecs. Please consult the supported codec list in the ffmpeg documentation.