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• Revision bde04ce503 : Merge branch 'frame-parallel' to enable frame parallel decode in master branch.

  21 janvier 2015, par hkuang

  Changed Paths :
   Modify /test/test-data.mk

  
   Modify /test/test-data.sha1

  
   Modify /test/test.mk

  
   Modify /test/test_vector_test.cc

  
   Modify /test/test_vectors.cc

  
   Modify /test/vp9_encoder_parms_get_to_decoder.cc

  
   Modify /test/vp9_frame_parallel_test.cc

  
   Modify /vp9/common/vp9_alloccommon.c

  
   Modify /vp9/common/vp9_alloccommon.h

  
   Modify /vp9/common/vp9_entropymode.c

  
   Modify /vp9/common/vp9_mvref_common.c

  
   Modify /vp9/common/vp9_mvref_common.h

  
   Modify /vp9/common/vp9_onyxc_int.h

  
   Modify /vp9/common/vp9_reconinter.c

  
   Modify /vp9/common/vp9_reconinter.h

  
   Modify /vp9/decoder/vp9_decodeframe.c

  
   Modify /vp9/decoder/vp9_decodeframe.h

  
   Modify /vp9/decoder/vp9_decodemv.c

  
   Modify /vp9/decoder/vp9_decoder.c

  
   Modify /vp9/decoder/vp9_decoder.h

  
   Modify /vp9/decoder/vp9_dthread.c

  
   Modify /vp9/decoder/vp9_dthread.h

  
   Modify /vp9/encoder/vp9_encoder.c

  
   Modify /vp9/encoder/vp9_encoder.h

  
   Modify /vp9/encoder/vp9_firstpass.c

  
   Modify /vp9/encoder/vp9_pickmode.c

  
   Modify /vp9/encoder/vp9_rd.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
   Modify /vp9/vp9_cx_iface.c

  
   Modify /vp9/vp9_dx_iface.c

  
   Modify /vp9/vp9dx.mk

  
   Modify /vpx/vpx_frame_buffer.h

  
  
  Merge branch ’frame-parallel’ to enable frame parallel decode in master branch.

  In frame parallel decode, libvpx decoder decodes several frames on all
  cpus in parallel fashion. If not being flushed, it will only return frame
  when all the cpus are busy. If getting flushed, it will return all the
  frames in the decoder. Compare with current serial decode mode in which
  libvpx decoder is idle between decode calls, libvpx decoder is busy
  between decode calls. VP9 frame parallel decode is >30% faster than serial
  decode with tile parallel threading which will makes devices play 1080P
  VP9 videos more easily.

  * frame-parallel :
  Add error handling for frame parallel decode and unit test for that.
  Fix a bug in frame parallel decode and add a unit test for that.
  Add two test vectors to test frame parallel decode.
  Add key frame seeking to webmdec and webm_video_source.
  Implement frame parallel decode for VP9.
  Increase the thread test range to cover 5, 6, 7, 8 threads.
  Fix a bug in adding frame parallel unit test.
  Add VP9 frame-parallel unit test.
  Manually pick "Make the api behavior conform to api spec." from master branch.
  Move vp9_dec_build_inter_predictors_* to decoder folder.
  Add segmentation map array for current and last frame segmentation.
  Include the right header for VP9 worker thread.
  Move vp9_thread.* to common.
  ctrl_get_reference does not need user_priv.
  Seperate the frame buffers from VP9 encoder/decoder structure.
  Revert "Revert "Revert "Revert 3 patches from Hangyu to get Chrome to
  build :"""

  Conflicts :
  test/codec_factory.h
  test/decode_test_driver.cc
  test/decode_test_driver.h
  test/invalid_file_test.cc
  test/test-data.sha1
  test/test.mk
  test/test_vectors.cc
  vp8/vp8_dx_iface.c
  vp9/common/vp9_alloccommon.c
  vp9/common/vp9_entropymode.c
  vp9/common/vp9_loopfilter_thread.c
  vp9/common/vp9_loopfilter_thread.h
  vp9/common/vp9_mvref_common.c
  vp9/common/vp9_onyxc_int.h
  vp9/common/vp9_reconinter.c
  vp9/decoder/vp9_decodeframe.c
  vp9/decoder/vp9_decodeframe.h
  vp9/decoder/vp9_decodemv.c
  vp9/decoder/vp9_decoder.c
  vp9/decoder/vp9_decoder.h
  vp9/encoder/vp9_encoder.c
  vp9/encoder/vp9_pickmode.c
  vp9/encoder/vp9_rdopt.c
  vp9/vp9_cx_iface.c
  vp9/vp9_dx_iface.c

  Change-Id : Ib92eb35851c172d0624970e312ed515054e5ca64

• Comparing two similar videos of different run time length

  5 décembre 2016, par Sachin Bansal

  I have two videos of a single selenium automation script. One is a baseline video and I want to compare the second video with this baseline video. In comparison I want to capture the screenshots of the frames that are not matching.

  The problem is that the videos might not be of same size and run time as the running of scripts depends on network.

  I have tried ffmpeg for this, but that didn’t result in any fruitful result. Can anyone guide me in a right direction on how to get a head-start in this.

  Thanks

• How to clip video and resize without lost frames using ffmpeg

  28 novembre 2016, par Mryoun

  I want clip my video time from some seconds to other seconds with crop it. so i tried command like this :

  ffmpeg -y -ss 0.648 -i girl.mp4 -t 20.0 -acodec copy -filter:v crop=262:ih:252:0 girl_den.mp4 

  but compare the result with the playing command :

  ffplay -ss 0.648 girl.mp4 -t 20.0 -vf "crop=262:ih:252:0" 

  it’s seems some frame that in front was lost. need help