[FFmpeg-user] mpeg4 better than libx264?

Reindl Harald h.reindl at thelounge.net
Fri Jan 13 15:15:45 CET 2012

Am 13.01.2012 09:07, schrieb dE .:
>> Yes, you are missing something.  The fact that you have asked for a bitrate of 20 megabits for a tiny, tiny video
>> (320x148).  The encoders tried their damn hardest to achieve it by using the lowest quantisers they could but
>> ultimately failed.
>> As for the results, you will see that x264 was allowed to output more bits.  A quick bit of math shows that x264
>> would have a similar file size if it had equivalently limited as mpeg4.
> I did that to ensure no quality loss, but when I capped the bitrate to 200k, I got very less quality loss as
> compared to the 20000k one (it's actual bitrate was 600k)

so set it to a human bitrate NOT lower than the input-file and
not to idiotic bitrates with some MEGABIT before considering
what 20 MBit PER SECOND does mean

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 262 bytes
Desc: OpenPGP digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-user/attachments/20120113/3e1a1a44/attachment.asc>

More information about the ffmpeg-user mailing list