I have heard of "Simple Profile Level 0" for MPEG-4, can FFmpeg encode this kind of file?
Can anyone tell me what these options mean in FFmpeg? -profile <int> E.VA. unknown E.VA. aac_main E..A. aac_low E..A. aac_ssr E..A. aac_ltp E..A. -level <int> E.VA. unknown E.VA. Thanks
tandangdang a ?crit :
Can anyone tell me what these options mean in FFmpeg?
-profile <int> E.VA. unknown E.VA. aac_main E..A. aac_low E..A. aac_ssr E..A. aac_ltp E..A. -level <int> E.VA. unknown E.VA.
With -level / -profile, you can force mpeg4 (h264 ?) specifications. You can find more informations about level/profile here : http://www.m4if.org/resources/mpeg4userfaq.php#Profiles With FFmpeg, you can make Mpeg4 ("-vcodec mpeg4") : - Simple Profile level 0, using "-profile 0 - level 8" - Simple Profile level 1, using "-profile 0 - level 1" - Simple Profile level 2, using "-profile 0 - level 2" - Advanced Profile level 4, using "-profile 15 - level 4" and surely more ;-) -- Julien YOUX . //// . (. .) ---------oOO--(_)--OOo------- http://www.nain-de-jardin.com
Le septidi 17 fructidor, an CCXV, tandangdang a ?crit?:
Can anyone tell me what these options mean in FFmpeg?
-profile <int> E.VA. unknown E.VA. aac_main E..A. aac_low E..A. aac_ssr E..A. aac_ltp E..A. -level <int> E.VA. unknown E.VA.
Some codec standards defines "profiles" and/or "levels", which are subsets of the codec suited for particular uses. For example, AAC defines a "low" profile, which can be read with approximatively as much CPU power as MP3, while the "main" profile is more expensive (but better quality, of course). -profile and -level are options to tell ffmpeg to use a profile or a level for its encoding. It only works if the codec implementation supports it. aac_main and cie. are symbolic constants for the -profile option to name AAC profiles. Obviously, the fact that they exist show that the codec implementation supports them, although SSR is currently not implemented. Regards, -- Nicolas George
participants (3)
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juju＠nain-de-jardin.com -
nicolas.george＠normalesup.org -
tandangdang＠gmail.com