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| author | Tim Nicholson <tim.nicholson@bbc.co.uk> | 2011-11-17 18:08:10 +0100 |
|---|---|---|
| committer | Clément Bœsch <ubitux@gmail.com> | 2011-11-17 18:30:03 +0100 |
| commit | d3baced24fcf602f2bceff1f73871303d4011c15 (patch) | |
| tree | 17241e82daac2136a7a4f682e72279675864a515 /doc/ffmpeg.texi | |
| parent | 5a2b3f3a52070232a68582a502fb60a9226ca86a (diff) | |
doc: reword and clarify default stream selection.
Diffstat (limited to 'doc/ffmpeg.texi')
| -rw-r--r-- | doc/ffmpeg.texi | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index de73d608ff..5daeb3bf57 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -61,10 +61,12 @@ The format option may be needed for raw input files. @chapter Stream selection @c man begin STREAM SELECTION -By default ffmpeg tries to pick the "best" stream of each type present in input -files and add them to each output file. For video, this means the highest -resolution, for audio the highest channel count. For subtitle it's simply the -first subtitle stream. +By default ffmpeg includes only one stream of each type (video, audio, subtitle) +present in the input files and adds them to each output file. It picks the +"best" of each based upon the following criteria; for video it is the stream +with the highest resolution, for audio the stream with the most channels, for +subtitle it's the first subtitle stream. In the case where several streams of +the same type rate equally, the lowest numbered stream is chosen. You can disable some of those defaults by using @code{-vn/-an/-sn} options. For full manual control, use the @code{-map} option, which disables the defaults just |