[FFmpeg-user] Converting for YouTube

Reindl Harald h.reindl at thelounge.net
Sat Aug 20 23:59:09 CEST 2011

Am 20.08.2011 23:54, schrieb Cecil Westerhof:
> Op woensdag 17 aug 2011 20:42 CEST schreef bouke at editb.nl:
>>> I want to convert my video's for YouTube. At the moment I am using:
>>> ffmpeg -i input.MOV -ar 22050 -acodec libmp3lame -ab 32k -r 25 -vcodec
>>> flv -s vga -qscale 2.5 output.flv
>>> This seems to work, but still gives quit big files. 35 MB for 1:48.
>>> Input file is 89 MB.
>>> So I was wondering: is there a better way?
>> For youtube one normally only preprocess.
>> De-interlace, crop and set correct aspect ratio.
>> Youtube will always recompress, so introducing compression artefacts is a
>> big no-no.
>> IOW, upload the biggest file your bandwith allows.
> I understood that when you preprocess you do not have the risk that
> YouTube converts wrongly.
> Today I made a 3½ minute video. This was 169 MB big and took almost an
> hour to upload. The converted (24 MB) took 8 minutes. So I think I'll
> keep converting. It looked okay, but if someone has better parameters

where are you living that 169 MB upload takes an hour? :-)
10 MBit up are priced with < 100,- per month abd valueable if needed

on the other hand - who interests that hour ONCE for upload
while quality is degraded for thousands of users if you crap the
input file before the upload?

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