提交 5438308f 编写于 作者: P Panagiotis Issaris

Update the documentation to be consistent with the new unit for the "ab"

parameter.

Originally committed as revision 8288 to svn://svn.ffmpeg.org/ffmpeg/trunk
上级 4e780252
...@@ -171,7 +171,7 @@ default. ...@@ -171,7 +171,7 @@ default.
@item non-working stuff @item non-working stuff
B-frames B-frames
@item example command line @item example command line
ffmpeg -i input -acodec aac -ab 128 -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X output.mp4 ffmpeg -i input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X output.mp4
@end table @end table
@section How do I encode videos which play on the PSP? @section How do I encode videos which play on the PSP?
...@@ -184,7 +184,7 @@ ffmpeg -i input -acodec aac -ab 128 -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+t ...@@ -184,7 +184,7 @@ ffmpeg -i input -acodec aac -ab 128 -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+t
@item non-working stuff @item non-working stuff
B-frames B-frames
@item example command line @item example command line
ffmpeg -i input -acodec aac -ab 128 -vcodec mpeg4 -b 1200kb -ar 24000 -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -title X -f psp output.mp4 ffmpeg -i input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb -ar 24000 -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -title X -f psp output.mp4
@item needed stuff for H.264 @item needed stuff for H.264
-acodec aac -vcodec h264 width*height<=76800 width%16=0? height%16=0? -ar 48000 -coder 1 -r 30000/1001 or 15000/1001 -f psp -acodec aac -vcodec h264 width*height<=76800 width%16=0? height%16=0? -ar 48000 -coder 1 -r 30000/1001 or 15000/1001 -f psp
@item working stuff for H.264 @item working stuff for H.264
...@@ -192,7 +192,7 @@ title, loop filter ...@@ -192,7 +192,7 @@ title, loop filter
@item non-working stuff for H.264 @item non-working stuff for H.264
CAVLC CAVLC
@item example command line @item example command line
ffmpeg -i input -acodec aac -ab 128 -vcodec h264 -b 1200kb -ar 48000 -mbd 2 -coder 1 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -title X -f psp -flags loop -trellis 2 -partitions parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 output.mp4 ffmpeg -i input -acodec aac -ab 128kb -vcodec h264 -b 1200kb -ar 48000 -mbd 2 -coder 1 -cmp 2 -subcmp 2 -s 368x192 -r 30000/1001 -title X -f psp -flags loop -trellis 2 -partitions parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 output.mp4
@end table @end table
@section Which are good parameters for encoding high quality MPEG-4? @section Which are good parameters for encoding high quality MPEG-4?
......
...@@ -117,7 +117,7 @@ Converts a.wav to MPEG audio at 22050Hz sample rate. ...@@ -117,7 +117,7 @@ Converts a.wav to MPEG audio at 22050Hz sample rate.
mapping from input stream to output streams: mapping from input stream to output streams:
@example @example
ffmpeg -i /tmp/a.wav -ab 64 /tmp/a.mp2 -ab 128 /tmp/b.mp2 -map 0:0 -map 0:0 ffmpeg -i /tmp/a.wav -ab 64k /tmp/a.mp2 -ab 128k /tmp/b.mp2 -map 0:0 -map 0:0
@end example @end example
Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. '-map Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. '-map
...@@ -127,7 +127,7 @@ stream, in the order of the definition of output streams. ...@@ -127,7 +127,7 @@ stream, in the order of the definition of output streams.
* You can transcode decrypted VOBs * You can transcode decrypted VOBs
@example @example
ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800k -g 300 -bf 2 -acodec mp3 -ab 128 snatch.avi ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800k -g 300 -bf 2 -acodec mp3 -ab 128k snatch.avi
@end example @end example
This is a typical DVD ripping example; the input is a VOB file, the This is a typical DVD ripping example; the input is a VOB file, the
...@@ -560,7 +560,7 @@ Set the number of audio frames to record. ...@@ -560,7 +560,7 @@ Set the number of audio frames to record.
@item -ar freq @item -ar freq
Set the audio sampling frequency (default = 44100 Hz). Set the audio sampling frequency (default = 44100 Hz).
@item -ab bitrate @item -ab bitrate
Set the audio bitrate in kbit/s (default = 64). Set the audio bitrate in bit/s (default = 64k).
@item -ac channels @item -ac channels
Set the number of audio channels (default = 1). Set the number of audio channels (default = 1).
@item -an @item -an
...@@ -578,7 +578,7 @@ can override the mapping using @code{-map} as usual. ...@@ -578,7 +578,7 @@ can override the mapping using @code{-map} as usual.
Example: Example:
@example @example
ffmpeg -i file.mpg -vcodec copy -acodec ac3 -ab 384 test.mpg -acodec mp2 -ab 192 -newaudio ffmpeg -i file.mpg -vcodec copy -acodec ac3 -ab 384k test.mpg -acodec mp2 -ab 192k -newaudio
@end example @end example
@item -alang code @item -alang code
Set the ISO 639 language code (3 letters) of the current audio stream. Set the ISO 639 language code (3 letters) of the current audio stream.
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册