Re: ffmpeg makes me mad…

[Johnny Rosenberg]

2011/7/16 Nils Kassube <kassube at gmx.net>:
> Johnny Rosenberg wrote:
>> ffmpeg -i Bkib.mpeg -aspect 16:9 -acodec copy Bkib-0.mpeg
>> Now I get my 16:9 copy of the video, but the bitrate is way too low
>> (about 400 kbps – the original is at 4000 kbps), so I tried this one:
>>
>> ffmpeg -i Bkib.mpeg -b 4000 -aspect 16:9 -acodec copy Bkib-0.mpeg
>> Didn't help though. It still lands around 400 kbps.
>
> From "man ffmpeg":
>
> | -b bitrate
> |  Set the video bitrate in bit/s (default = 200 kb/s).
>
> Therefore I would try "-b 4000k".

He he he… ooopsie…! Yes, you are right, of course! For some strange
reason I thought that 4000 meant 4000 kb/s, not 4000 b/s… I'm not sure
why I thought that, maybe this article tricked me:

http://www.linuxjournal.com/article/8517?page=0,1

Quote:
”So if we want to encode using the MPEG-4 codec at 1,200kbps video
bitrate and 128kbps audio bitrate, the command looks like this:
ffmpeg -i InputFile.mpg -ab 128 -b 1200 -vcodec mpeg4 OutputFile.avi”

Obviously there is a ”k” there at two different places, so it should be:
ffmpeg -i InputFile.mpg -ab 128k -b 1200k -vcodec mpeg4 OutputFile.avi
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯↑¯¯¯¯¯¯¯↑¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

In my case, 4M worked as well, which is a bit shorter to type than 4000k.

Thanks for waking me up!


Kind regards

Johnny Rosenberg
ジョニー・ローゼンバーグ

>
>
> Nils
>
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