doc/muxers.texi: Fix mp3 picture attachment documentation.

99eedfc4 · Carl Eugen Hoyos · 911e2706 · 99eedfc4
Commit 99eedfc4 authored Feb 01, 2013 by Carl Eugen Hoyos
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muxers.texi doc/muxers.texi +4 -3

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--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -727,10 +727,11 @@ Write an mp3 with an ID3v2.3 header and an ID3v1 footer:
 ffmpeg -i INPUT -id3v2_version 3 -write_id3v1 1 out.mp3
 @end example

-Attach a picture to an mp3:
+To attach a picture to an mp3 file select both the audio and the picture stream
+with @code{map}:
 @example
-ffmpeg -i input.mp3 -i cover.png -c copy -metadata:s:v title="Album cover"
-metadata:s:v comment="Cover (Front)" out.mp3
+ffmpeg -i input.mp3 -i cover.png -c copy -map 0 -map 1
+-metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" out.mp3
 @end example

 @section ogg