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Sur d’autres sites (6368)

  • avcodec/v210dec : add support for frame and slice threading

    25 novembre 2019, par Limin Wang
    avcodec/v210dec : add support for frame and slice threading

    1, Test server configure :
    
[root@localhost ]# cat /proc/cpuinfo  |grep "model name"
    
 model name : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
    
 model name : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
    
 ...
    

    [root@localhost ]# free -h
    
              total        used        free      shared  buff/cache   available
    
              Mem :           102G        1.1G        100G         16M        657M        100G
    
              Swap :          4.0G          0B        4.0G
    

    2, Test result :
    
encode the v210 input data for testing :
    
./ffmpeg -y -i 4k_422.ts  -c:v v210 -vframes 10 test.avi
    

    master :
    
./ffmpeg -y -threads 1 -stream_loop 1000 -i ./test.avi -benchmark -f null -
    
frame=10010 fps= 60 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=13.7x
    
video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
    
bench : utime=101.869s stime=66.181s rtime=167.996s
    
bench : maxrss=186552kB
    

    patch applied :
    
./ffmpeg -y -threads 2 -thread_type slice -stream_loop 1000 -i ./test.avi -benchmark -f null -
    
frame=10010 fps= 72 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=16.5x
    
video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
    
bench : utime=103.562s stime=74.858s rtime=139.599s
    
bench : maxrss=188616kB
    

    ./ffmpeg -y -threads 2 -thread_type frame -stream_loop 1000 -i ./test.avi -benchmark -f null -
    
frame=10010 fps= 85 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=19.6x
    
video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
    
bench : utime=114.310s stime=92.685s rtime=117.693s
    
bench : maxrss=231896kB
    

    Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/v210dec.c
    • [DH] libavcodec/v210dec.h

  • avfilter/vf_dnn_processing : add a generic filter for image proccessing with dnn networks

    31 octobre 2019, par Guo, Yejun
    avfilter/vf_dnn_processing : add a generic filter for image proccessing with dnn networks

    This filter accepts all the dnn networks which do image processing.
    
Currently, frame with formats rgb24 and bgr24 are supported. Other
    
formats such as gray and YUV will be supported next. The dnn network
    
can accept data in float32 or uint8 format. And the dnn network can
    
change frame size.
    

    The following is a python script to halve the value of the first
    
channel of the pixel. It demos how to setup and execute dnn model
    
with python+tensorflow. It also generates .pb file which will be
    
used by ffmpeg.
    

    import tensorflow as tf
    
import numpy as np
    
import imageio
    
in_img = imageio.imread('in.bmp')
    
in_img = in_img.astype(np.float32)/255.0
    
in_data = in_img[np.newaxis, :]
    
filter_data = np.array([0.5, 0, 0, 0, 1., 0, 0, 0, 1.]).reshape(1,1,3,3).astype(np.float32)
    
filter = tf.Variable(filter_data)
    
x = tf.placeholder(tf.float32, shape=[1, None, None, 3], name='dnn_in')
    
y = tf.nn.conv2d(x, filter, strides=[1, 1, 1, 1], padding='VALID', name='dnn_out')
    
sess=tf.Session()
    
sess.run(tf.global_variables_initializer())
    
output = sess.run(y, feed_dict=x : in_data)
    
graph_def = tf.graph_util.convert_variables_to_constants(sess, sess.graph_def, ['dnn_out'])
    
tf.train.write_graph(graph_def, '.', 'halve_first_channel.pb', as_text=False)
    
output = output * 255.0
    
output = output.astype(np.uint8)
    
imageio.imsave("out.bmp", np.squeeze(output))
    

    To do the same thing with ffmpeg :

    - generate halve_first_channel.pb with the above script

    - generate halve_first_channel.model with tools/python/convert.py

    - try with following commands
    
  ./ffmpeg -i input.jpg -vf dnn_processing=model=halve_first_channel.model:input=dnn_in:output=dnn_out:fmt=rgb24:dnn_backend=native -y out.native.png
    
  ./ffmpeg -i input.jpg -vf dnn_processing=model=halve_first_channel.pb:input=dnn_in:output=dnn_out:fmt=rgb24:dnn_backend=tensorflow -y out.tf.png
    

    Signed-off-by : Guo, Yejun <yejun.guo@intel.com>
    
Signed-off-by : Pedro Arthur <bygrandao@gmail.com>
    • [DH] configure
    • [DH] doc/filters.texi
    • [DH] libavfilter/Makefile
    • [DH] libavfilter/allfilters.c
    • [DH] libavfilter/vf_dnn_processing.c

  • avcodec/v410dec : add support for frame and slice threading

    25 novembre 2019, par Limin Wang
    avcodec/v410dec : add support for frame and slice threading

    1, Test server configure :
    
[root@localhost ]# cat /proc/cpuinfo  |grep "model name"
    
model name	 : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
    
model name	 : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
    
...
    

    [root@localhost ]# free -h
    
              total        used        free      shared  buff/cache   available
    
              Mem :           102G        1.1G        100G         16M        657M        100G
    
              Swap :          4.0G          0B        4.0G
    

    2, Test result :
    
encode the v410 input data for testing :
    
 ./ffmpeg -y -i 4k_422.ts  -c:v v410 -vframes 10 test.avi
    

    master :
    
./ffmpeg -y -stream_loop 1000 -i ./test.avi -benchmark -f null -
    
frame=10010 fps= 37 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed= 8.6x
    
video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
    
bench : utime=166.016s stime=102.192s rtime=268.120s
    
bench : maxrss=273400kB
    

    patch applied :
    
./ffmpeg -y -threads 2 -thread_type slice -stream_loop 1000 -i ./test.avi -benchmark -f null -
    
frame=10010 fps= 53 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=12.3x
    
video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
    
bench : utime=165.135s stime=100.456s rtime=187.994s
    
bench : maxrss=275476kB
    

    ./ffmpeg -y -threads 2 -thread_type frame -stream_loop 1000 -i ./test.avi -benchmark -f null -
    
frame=10010 fps= 61 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=14.1x
    
video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
    
bench : utime=171.386s stime=122.102s rtime=163.637s
    
bench : maxrss=340308kB
    

    Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/v410dec.c

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