[FFmpeg-user] Need help converting videos for on-demand-streaming
wtfux.dev at googlemail.com
Fri Mar 30 12:52:16 CEST 2012
>> 3. -tune animation
>> What exactly is this for? Since the videos are animated I think this
>> is a good option?
> Depends, it is not meant for 3d animation, this is more for old
> fashioned 2d anim/cartoonish stuff.
> maybe check http://doom10.org/index.php?topic=253.0
It's actually this kind of video, I just used the wrong term in my
post. So it should fit.
>> 5. Faster conversion?
>> If I need the conversion faster, should I change -preset slow to
>> -preset medium or something else? Will the file get larger or the
>> quality worse?
> afaik they are not directly comparable, but i could be wrong, my
> default is -preset medium.
It looks like they can be used together. With `-preset superfast`
it'll encode with ~80fps and output a huge file. I'll try medium and
check the difference to slow.
>> 7. I'm not sure if this is related to ffmpeg but I can't seek when
>> streamed over HTTP (I do use qt-faststart after ffmpeg!). Other vids I
>> converted some months ago however work. The only difference I know of
>> is that I used that -partitions parameter from the question above.
> how are you streaming? progressive download or real streaming? For
> progressive download qt-faststart is working for me.
progressive download. Without qt-faststart the whole file needs to be
downloaded before flash player can play it.
However seeking / jumping to a part that has not yet been loaded won't
work (with videoJS or flowplayer; in vlc it works (from http)).
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