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faq: use relative links to own documentation
This way locally installed documentation refers to itself instead of the website. Bud-Id: https://bugs.debian.org/841501 Reviewed-by: James Almer <jamrial@gmail.com> Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
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doc/faq.texi
14
doc/faq.texi
@ -311,18 +311,18 @@ invoking ffmpeg with several @option{-i} options.
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For audio, to put all channels together in a single stream (example: two
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mono streams into one stereo stream): this is sometimes called to
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@emph{merge} them, and can be done using the
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@url{https://ffmpeg.org/ffmpeg-filters.html#amerge, @code{amerge}} filter.
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@url{ffmpeg-filters.html#amerge, @code{amerge}} filter.
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@item
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For audio, to play one on top of the other: this is called to @emph{mix}
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them, and can be done by first merging them into a single stream and then
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using the @url{https://ffmpeg.org/ffmpeg-filters.html#pan, @code{pan}} filter to mix
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using the @url{ffmpeg-filters.html#pan, @code{pan}} filter to mix
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the channels at will.
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@item
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For video, to display both together, side by side or one on top of a part of
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the other; it can be done using the
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@url{https://ffmpeg.org/ffmpeg-filters.html#overlay, @code{overlay}} video filter.
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@url{ffmpeg-filters.html#overlay, @code{overlay}} video filter.
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@end itemize
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@ -333,19 +333,19 @@ There are several solutions, depending on the exact circumstances.
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@subsection Concatenating using the concat @emph{filter}
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FFmpeg has a @url{https://ffmpeg.org/ffmpeg-filters.html#concat,
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FFmpeg has a @url{ffmpeg-filters.html#concat,
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@code{concat}} filter designed specifically for that, with examples in the
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documentation. This operation is recommended if you need to re-encode.
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@subsection Concatenating using the concat @emph{demuxer}
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FFmpeg has a @url{https://www.ffmpeg.org/ffmpeg-formats.html#concat,
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FFmpeg has a @url{ffmpeg-formats.html#concat,
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@code{concat}} demuxer which you can use when you want to avoid a re-encode and
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your format doesn't support file level concatenation.
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@subsection Concatenating using the concat @emph{protocol} (file level)
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FFmpeg has a @url{https://ffmpeg.org/ffmpeg-protocols.html#concat,
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FFmpeg has a @url{ffmpeg-protocols.html#concat,
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@code{concat}} protocol designed specifically for that, with examples in the
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documentation.
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@ -485,7 +485,7 @@ scaling adjusts the SAR to keep the DAR constant.
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If you want to stretch, or “unstretch”, the image, you need to override the
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information with the
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@url{https://ffmpeg.org/ffmpeg-filters.html#setdar_002c-setsar, @code{setdar or setsar filters}}.
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@url{ffmpeg-filters.html#setdar_002c-setsar, @code{setdar or setsar filters}}.
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Do not forget to examine carefully the original video to check whether the
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stretching comes from the image or from the aspect ratio information.
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