Pipeline performance problems

[David Klasinc]

On 03/22/2012 12:15 PM, David Klasinc wrote:
> $ time gst-launch -e ximagesrc startx=0 starty=0 endx=1919 endy=1079\
> num-buffers=250 use-damage=0 ! video/x-raw-rgb,framerate=25/1 ! \
> videorate ! queue ! ffmpegcolorspace ! vp8enc ! queue ! webmmux !
> \ queue ! filesink location="test.webm"

The problem is in the VP8 encoder. This happens with x264enc:

$ time gst-launch -e ximagesrc startx=0 starty=0 endx=1279 endy=1023\ 
num-buffers=150 use-damage=0 ! video/x-raw-rgb,framerate=15/1 !\ 
videorate ! queue ! ffmpegcolorspace ! x264enc ! queue ! matroskamux !\ 
queue ! filesink location="test.mkv"

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Got EOS from element "pipeline0".
Execution ended after 10582065296 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...

real	0m10.689s
user	0m9.877s
sys	0m0.320s


With vp8 I pressed CTRL-C after around 30 seconds and this happened:

$ time gst-launch -e ximagesrc startx=0 starty=0 endx=1279 endy=1023\ 
num-buffers=150 use-damage=0 ! video/x-raw-rgb,framerate=15/1 !\ 
videorate ! queue ! ffmpegcolorspace ! vp8enc ! queue ! webmmux ! \
queue ! filesink location="test.webm"
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Redistribute latency...
^CCaught interrupt -- handling interrupt.
Interrupt: Stopping pipeline ...
EOS on shutdown enabled -- Forcing EOS on the pipeline
Waiting for EOS...
Got EOS from element "pipeline0".
EOS received - stopping pipeline...
Execution ended after 70585427853 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...

real	1m10.686s
user	1m9.884s
sys	0m0.200s

Pipeline is exactly the same except for encoder and muxer. True, it 
could also be a muxer problem. :)

Any thoughts, ideas on how to improve performance?

Rgrds,
David