On Mon, Feb 02, 2015 at 10:30:51 -0500, Nicanor Garcia wrote: > Currently I'm using the -b option to set the bitrate of the encoded audio, > but I want to know what would happen if I didn't set that option? Would I > get a multi-rate audio signal?
According to the documentation, there are constant bitrate defaults for both audio and video: https://www.ffmpeg.org/ffmpeg-codecs.html#Codec-Options -b:a defaults to 128K [should that be k?] if not given, -b:v defaults to 200k if not given. I thought it might be codec dependant, but I can't find any documentation on that. For example, libx264 video defaults to preset "medium", crf 23, I believe, which is different from said 200k. Apart from that, if you want VBR, you will needs to set some appropriate option to trigger that (often -q/-qscale). Cheers, Moritz _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
