ffmpeg2theora multi-threading

[Leo Izen]

Is there a way to use multi-threading with ffmpeg2theora? Pretty much any
type i'm ok with, including multi-threaded theora encoding or multi-threaded
ffmpeg decoding, or using half of my cpu cores on ffmpeg decoding and the
other half on theora encoding. Is there a way to do multithreaded thoera
encoding?

[Benjamin M. Schwartz]

Post by Leo Izen
Is there a way to do
multithreaded thoera encoding?

The only thing I know of that seems relevant is gstreamer. With gstreamer
you can "easily" do decoding, processing, and re-encoding in separate
threads. You can make use of this directly (in a gstreamer pipeline via
gst-launch) or by using an application such as Pitivi, Arista, or
Transmaggedon that is based on gstreamer.

There is currently no truly multithreaded encoder that breaks the encoding
of Theora into multiple threads.

--Ben

[Felipe Portavales Goldstein]

On Sat, Jan 22, 2011 at 3:40 AM, Benjamin M. Schwartz

 Is there a way to do
multithreaded thoera encoding?

The only thing I know of that seems relevant is gstreamer.  With gstreamer
you can "easily" do decoding, processing, and re-encoding in separate
threads.  You can make use of this directly (in a gstreamer pipeline via
gst-launch) or by using an application such as Pitivi, Arista, or
Transmaggedon that is based on gstreamer.
There is currently no truly multithreaded encoder that breaks the encoding
of Theora into multiple threads.

Yes there is.
I did that:
http://svn.xiph.org/branches/theora-multithread/

But the gain with 2 cores is usually small (about 10% to 20%) due to
datapath dependencies of the implementation.

--Ben
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