Multiple-resolution encoder
The example encoder down-samples the input video frames a number of
times with a down-sampling factor, and then encodes and outputs
bitstreams with different resolutions.
Support arbitrary down-sampling factor, and down-sampling factor
can be different for each encoding level.
For example, the encoder can be tested as follows.
1. Configure with multi-resolution encoding enabled:
../libvpx/configure --target=x86-linux-gcc --disable-codecs
--enable-vp8 --enable-runtime_cpu_detect --enable-debug
--disable-install-docs --enable-error-concealment
--enable-multi-res-encoding
2. Run make
3. Encode:
If input video is 1280x720, run:
./vp8_multi_resolution_encoder 1280 720 input.yuv 1.ivf 2.ivf 3.ivf 1
(output: 1.ivf(1280x720); 2.ivf(640x360); 3.ivf(320x180).
The last parameter is set to 1/0 to show/not show PSNR.)
4. Decode:
./simple_decoder 1.ivf 1.yuv
./simple_decoder 2.ivf 2.yuv
./simple_decoder 3.ivf 3.yuv
5. View video:
mplayer 1.yuv -demuxer rawvideo -rawvideo w=1280:h=720 -loop 0 -fps 30
mplayer 2.yuv -demuxer rawvideo -rawvideo w=640:h=360 -loop 0 -fps 30
mplayer 3.yuv -demuxer rawvideo -rawvideo w=320:h=180 -loop 0 -fps 30
The encoding parameters can be modified in vp8_multi_resolution_encoder.c,
for example, target bitrate, frame rate...
Modified API. John helped a lot with that. Thanks!
Change-Id: I03be9a51167eddf94399f92d269599fb3f3d54f5
diff --git a/configure b/configure
index cca94a2..363687a 100755
--- a/configure
+++ b/configure
@@ -35,7 +35,7 @@
${toggle_internal_stats} output of encoder internal stats for debug, if supported (encoders)
${toggle_mem_tracker} track memory usage
${toggle_postproc} postprocessing
- ${toggle_multithread} multithreaded encoding and decoding.
+ ${toggle_multithread} multithreaded encoding and decoding
${toggle_spatial_resampling} spatial sampling (scaling) support
${toggle_realtime_only} enable this option while building for real-time encoding
${toggle_error_concealment} enable this option to get a decoder which is able to conceal losses
@@ -44,6 +44,7 @@
${toggle_static} static library support
${toggle_small} favor smaller size over speed
${toggle_postproc_visualizer} macro block / block level visualizers
+ ${toggle_multi_res_encoding} enable multiple-resolution encoding
Codecs:
Codecs can be selectively enabled or disabled individually, or by family:
@@ -262,6 +263,7 @@
postproc_visualizer
os_support
unit_tests
+ multi_res_encoding
"
CMDLINE_SELECT="
extra_warnings
@@ -304,6 +306,7 @@
small
postproc_visualizer
unit_tests
+ multi_res_encoding
"
process_cmdline() {
