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lavfi: add showwavespic filter

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This is a variant of showwaves. It is implemented as a different filter
so that the user is not allowed to use meaningless options which belong
to showwaves (such as rate).

Major edits done by Stefano Sabatini, from a patch by ubitux.

See thread:
From: Clément Bœsch <u@pkh.me>
To: ffmpeg-devel@ffmpeg.org
Date: Wed, 24 Dec 2014 15:03:26 +0100
Subject: [FFmpeg-devel] [PATCH] avfilter/showwaves: add single_pic option
This commit is contained in:
Clément Bœsch
2014-12-24 15:03:26 +01:00
committed by Stefano Sabatini
parent 0f16dfda50
commit 304fdfe9f3
6 changed files with 270 additions and 36 deletions
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libavfilter/Makefile
+1
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@@ -236,6 +236,7 @@ OBJS-$(CONFIG_CONCAT_FILTER) += avf_concat.o
OBJS-$(CONFIG_SHOWCQT_FILTER) += avf_showcqt.o
OBJS-$(CONFIG_SHOWSPECTRUM_FILTER) += avf_showspectrum.o
OBJS-$(CONFIG_SHOWWAVES_FILTER) += avf_showwaves.o
OBJS-$(CONFIG_SHOWWAVESPIC_FILTER) += avf_showwaves.o
# multimedia sources
OBJS-$(CONFIG_AMOVIE_FILTER) += src_movie.o