[FFmpeg-user] web videos with flv

Reindl Harald h.reindl at thelounge.net
Fri Feb 17 18:46:52 CET 2012

Am 17.02.2012 18:41, schrieb Reindl Harald:
> Am 17.02.2012 18:34, schrieb Fernanda Rebelatto:
>> hi.
>>  I appreciate the tips, but do not discuss this way.
>> I am using ffmpeg for the first ever.
>> Anything already helps me a lot.
>> In my program being developed in flex, and play streaming video after
>> being converted. I believe that only Flv works well, but not sure.
>> I'm learning to work with videos.
>> On youtube flv is used.
> not really
> these days most things are converted to H264 there and
> currently most are going to WEBM (VP8)
>> When I change the resolution of the video, it gets smaller. But if I
>> do not change? if I use the original size, the file is common to get
>> bigger? I thought that would turn my flv video to a minor.
> the bitrate and used codec does affect the size much more than
> the resolution - mostly the bitrate, remind wthat KILOBIT PER SECOND
> does mean :-)

this is as exmaple one of my since years used commandlines
to generate H264-videos playing nearly everyhwere with a
proved good quality by as small as possible files

most of the params are replacing "-vprofile baseline"

but however, i played around many days and nights with all sorts of
input files convert them for Flash-Player/HTML5-<video> and this
was the most perfect combination built in our php-ffmpeg-wrapper

ffmpeg -i 'infile.avi' -y -vb '448k' -ab '96k' -bt '32k' -ar '44100' -ac '2' -r '25' -async '1' -maxrate '544k' -f
'ipod' -vcodec 'libx264' -acodec 'libfaac' -flags '+loop+mv4' -cmp '256' -partitions
'+parti4x4+parti8x8+partp4x4+partp8x8+partb8x8' -me_method 'hex' -me_range '16' -subq '7' -trellis '1' -refs '5' -g
'250' -keyint_min '25' -sc_threshold '40' -i_qfactor '0.71' -qcomp '0.6' -qmin '0' -qmax '69' -qdiff '4' -bufsize
'2M' -directpred '3' -rc_lookahead '50' -threads '2' -coder '0' -bf '0' -flags2 '-wpred-dct8x8' -wpredp '0'
-timestamp 'now' 'outfile.mp4'

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