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This is done by adding a setsar filter at the beginning of the configured filterchain. This implementation is more robust, since does not modify the filterchain description (which was creating potential syntax errors), but directly modifies the filterchain structure. This also changes the ffmpeg -aspect behavior, as following filters in the filterchain can change the DAR/SAR set by the inserted setsar filter. Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory. 2) Licensing ------------ * See the LICENSE file.