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author | Anton Khirnov <anton@khirnov.net> | 2011-12-25 16:48:06 +0400 |
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committer | Anton Khirnov <anton@khirnov.net> | 2011-12-25 17:31:13 +0400 |
commit | 2bbb472016f52c5e282c83a988a5179f1079557a (patch) | |
tree | 4dc65c02035d59da55fbc080968456ef2db34f9c | |
parent | 8b94df0f2047e9728cb872adc9e64557b7a5152f (diff) |
FAQ: add an entry for common error when using -profile
-rw-r--r-- | doc/faq.texi | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/faq.texi b/doc/faq.texi index f3ddbbe811..8044200987 100644 --- a/doc/faq.texi +++ b/doc/faq.texi @@ -266,6 +266,26 @@ avconv -f u16le -acodec pcm_s16le -ac 2 -ar 44100 -i all.a \ rm temp[12].[av] all.[av] @end example +@section -profile option fails when encoding H.264 video with AAC audio + +@command{avconv} prints an error like + +@example +Undefined constant or missing '(' in 'baseline' +Unable to parse option value "baseline" +Error setting option profile to value baseline. +@end example + +Short answer: write @option{-profile:v} instead of @option{-profile}. + +Long answer: this happens because the @option{-profile} option can apply to both +video and audio. Specifically the AAC encoder also defines some profiles, none +of which are named @var{baseline}. + +The solution is to apply the @option{-profile} option to the video stream only +by using @url{http://libav.org/avconv.html#Stream-specifiers-1, Stream specifiers}. +Appending @code{:v} to it will do exactly that. + @chapter Development @section Are there examples illustrating how to use the Libav libraries, particularly libavcodec and libavformat? |