[FFmpeg-user] bitrates and limits

JULIAN GARDNER joolzg at btinternet.com
Sat Jan 26 17:35:20 CET 2013

> From: Carl Eugen Hoyos <cehoyos at ag.or.at>
>To: ffmpeg-user at ffmpeg.org 
>Sent: Saturday, 26 January 2013, 17:26
>Subject: Re: [FFmpeg-user] bitrates and limits
>JULIAN GARDNER <joolzg <at> btinternet.com> writes:
>> Ive been playnig around with "Bitrate viewer" on a 
>> few files ive converted and noticed something which 
>> i thought shoud not be there.
>> I encoded a file with
>> ffmpeg -threads 0 -i xxx.avi -vcodec libx264
>                                       ^^^^^^^
>> -preset superfast -x264opts keyint=75 -s 720x288 
>> -bufsize 1M -r 25 -b:v 600k -bt 200k -maxrate 900k 
>> -acodec libfaac -ab 96k -ar 48k -ac 2 -async 1 -y 
>> -f mpegts xxx.ts
>> Now i was expecting the final bitrate to be under 1000k, 
>> but using the viewer i have a min of 38k and a max of
>> 1500k, average is 838k.
>This does not look FFmpeg-related to me.
>Carl Eugen
>ffmpeg-user mailing list
>ffmpeg-user at ffmpeg.org

just so we ae on the same page, xxx.avi, is a generic name given to files to be converted, it also happens with mpeg2 files as well.

Are you saying that as im using x264 this should be passed on to the x264 developers?

pps. did you download the fails.bin file?

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