Example for 2 TRLs (Temporal Resultion Levels):
+-------+------+-------+ +-----------+ +-----+--------+
| E_1 | | | | L_1 | | E_1 | |
| v v v | v | v v
L_0 +-------+ +----+ +----+ +--------+ +--------+ +----+ +-------+ L_0
---->| split | | ME | | MC | | update | | etadpu | | CM | | merge |---->
+-------+ +----+ +----+ +--------+ +--------+ +----+ +-------+
| ^ ^ | ^ ^ ^ | ^
| O_1 | | | H_1 | | | | O_1 |
+-------+------+ +-------+--------------+------+ +------+
<----------- anayze_step -----------><----- synthesize_step ------>
Example for 4 TRLs:
+---+ +---+ +---+ +---+ +---+ +---+ +---+ +---+
| | | | | | | | | | | | | | | | M_1
v | | v v | | v v | | v v | | v
+---+ +---+ +---+ +---+ +---+ +---+ +---+ +---+ +---+
| 0 | | 1 | | 2 | | 3 | | 4 | | 5 | | 6 | | 7 | | 8 | L_0
+---+ +---+ +---+ +---+ +---+ +---+ +---+ +---+ +---+
L_0.0
+---------+ +---------+ +---------+ +---------+
| | | | | | | | M_2
v | | v v | | v
+---+ +---+ +---+ +---+ +---+
| 0 | | 2 | | 4 | | 6 | | 8 |
+---+ +---+ +---+ +---+ +---+
L_1.0 H_1.0 L_1.1 H_1.1 L_1.2
+---------------------+ +---------------------+
| | | | M_3
v v v v
+---+ +---+ +---+
| 0 | | 4 | | 8 |
+---+ +---+ +---+
L_2.0 H_2.0 L_2.1
-
Directory contents:
bin: MCTF's executables.compile: script for creating MCTF's executables.README.txt: this, file.src: source files of MCTF.experiments: experiment scripts.
source ./compile
remember to define the variable MCTF and to put the dir ~/bin at the
beggining of the PATH variable:
export MCTF=~/MCTF-video-coding/"
export PATH=~/bin:$PATH
export MCTF_TEXTURE_CODEC="j2k"
export MCTF_MOTION_CODEC="j2k"
#export MCTF_QUANTIZER="orthogonal"
export MCTF_QUANTIZER="automatic"
export MCTF_TEXTURE_CODEC="j2k"
export MCTF_MOTION_CODEC="j2k"
#export MCTF_QUANTIZER="orthogonal"
export MCTF_QUANTIZER="automatic"
mkdir tmp
cd tmp
wget http://www.hpca.ual.es/~vruiz/videos/container_352x288x30x420x300.avi
ffmpeg -i container_352x288x30x420x300.avi container_352x288x30x420x300.yuv
ln -s container_352x288x30x420x300.yuv low_0
mctf compress --TRLs=6 --GOPs=2 --quality=0.7
mctf info --TRLs=6 --GOPs=2
mkdir tmp
mctf copy tmp
cd tmp
mctf expand --TRLs=6 --GOPs=2
mplayer low_0 -demuxer rawvideo -rawvideo cif -loop 0
export MCTF_TEXTURE_CODEC="j2k"
export MCTF_MOTION_CODEC="j2k"
mkdir tmp
cd tmp
wget http://www.hpca.ual.es/~vruiz/videos/container_352x288x30x420x300.avi
ffmpeg -i container_352x288x30x420x300.avi container_352x288x30x420x300.yuv
ln -s container_352x288x30x420x300.yuv low_0
mctf compress --TRLs=2 --GOPs=2 --motion_layers=1 --texture_layers=8
mctf info_j2k --TRLs=2 --GOPs=2
mkdir transcode_quality
mctf transcode_quality --TRLs=2 --GOPs=2 --QSLs=5 --motion_layers=1 --texture_layers=8
cd transcode_quality
mctf info_j2k --TRLs=2 --GOPs=2
mctf expand --TRLs=2 --GOPs=2
mplayer low_0 -demuxer rawvideo -rawvideo cif -loop 0
mkdir mj2k
cd mj2k
ln -s ~/Videos/container_352x288x30x420x300.yuv low_0
mcmj2k compress --TRLs=1 --GOPs=289 --quantizations="45000"
mcmj2k info --TRLs=1 --GOPs=289
mkdir tmp
cp *.mjc *type* tmp
cd tmp
mcmj2k expand --TRLs=1 --GOPs=289
mplayer low_0 -demuxer rawvideo -rawvideo cif -loop 0
cd ../../..
rm -rf mj2k
mkdir mcj2k
cd mcj2k
ln -s ~/Videos/container_352x288x30x420x300.yuv low_0
mcmj2k compress --TRLs=6 --GOPs=9 --quantizations="44098"
mcmj2k info --TRLs=6 --GOPs=9
mkdir tmp
cp *.mjc *type* tmp
cd tmp
mcmj2k expand --TRLs=6 --GOPs=9
mplayer low_0 -demuxer rawvideo -rawvideo cif -loop 0
cd ../../..
rm -rf mcj2k
:
rm -f *motion*
mcj2k compress --pictures=289
mcj2k info --pictures=289
mcj2k expand --pictures=289
:
mcj2k compress --quantizations="44000,43500,43000 # Higher slopes,
# worst qualities
mcj2k info
mcj2k expand # 44000
mcj2k expand --layers=2 # 43500
mcj2k expand --layers=3 # 43000
:
rm -f *motion*
mcj2k compress --temporal_levels=6
mcj2k info --temporal_levels=6
mcj2k expand --temporal_levels=6
mkdir tmp
cd tmp
ln -s ~/Videos/container_352x288x30x420x300.yuv low_0
mcjpg compress
mcjpg info
mkdir tmp
cp *.mjpeg *.mjc *type* tmp
cd tmp
mcjpg expand
mplayer low_0 -demuxer rawvideo -rawvideo cif -loop 0
cd ../../..
rm -rf tmp
:
mcjpg compress --slopes="25" # Higher slope, worst quality
mcjpg info
mcjpg expand
```
+-------+
| split |
+-------+
```
The current version of MCTF has the following limitations:
-
The number of encoded images must be a multiply of the GOP-size plus one. Thus, for example, if GOP-size=32, the number of compressed images have to be 33, 65, 97, ...
-
The size of the images must be a multiply of the macro-block size. This means that, for example, if the image is 1280x720 pixels, only up to 16x16 macro-blocks can be used.
The MCTF project has been supported by the Junta de Andalucía through the Proyecto Motriz "Codificación de Vídeo Escalable y su Streaming sobre Internet" (P10-TIC-6548).