On Mon, Feb 10, 2020 at 17:27:03 +0800, Linjie Fu wrote:
> + { "autoscale", HAS_ARG | OPT_BOOL | OPT_SPEC |
> + OPT_EXPERT | OPT_OUTPUT,
> { .off = OFFSET(autoscale) },
> + "automatically insert a scale filter at the end of the filter graph
> if a resolution"
> + "change is detected. This ensures all frames are the same resolution
> as the first frame"
> + "when they leave the filter chain (this option is enabled by
> default)."
> + "If disabled, some encoders/muxers may not support this mode."},
Have you checked the output of "ffmpeg -h"? Your C strings merge
directly together, and are therefore missing spaces, e.g. in
"resolutionchange" and "as the first framewhen they leave",
Moritz
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