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• What is the difference between ffmpeg command with -codec and without -codec

  26 avril 2018, par Sat

  I am trying to calculate video frozen time, I created mp4 format file with 23seconds frozen.
  I am converting mp4 file into segment(.ts) file using following command

  ffmpeg -i Palivala.mp4 -codec copy -vbsf h264_mp4toannexb -map 0 palivaalaa.ts

  When i directly use video file (Palivala.mp4) or segment file(palivaalaa.ts) which generated from above command, I am getting the result as expected. i.e getting video frozen time as 23seconds.

  But when I use following command

  ffmpeg -i Palivala.mp4  -map 0 palivaalaa.ts

  I am able to see 1second frozen frames then after that 1 frame without frozen immediately next frame frozen and frozen continued for 6seconds again 1 non-frozen frame...................

  1) What is the difference between above 2 commands ?

  2) both commands chooses libx264 ?

• avcodec/vc1 : store color-difference reference field type

  23 avril 2018, par Jerome Borsboom

  avcodec/vc1 : store color-difference reference field type
  The loop filter for P interlace field pictures needs the reference field type.
  
  For luma, the reference field type was already available. Store the reference
  
  field type for color-difference as well.
  Signed-off-by : Jerome Borsboom <jerome.borsboom@carpalis.nl>
  

  • [DH] libavcodec/vc1_mc.c

• avfilter/x86/vf_blend : add 16 bit version for BLEND_SIMPLE, phoenix, difference...

  17 février 2018, par Martin Vignali

  avfilter/x86/vf_blend : add 16 bit version for BLEND_SIMPLE, phoenix, difference for SSE and AVX2 (x86_64)
  

  • [DH] libavfilter/x86/vf_blend.asm
  • [DH] libavfilter/x86/vf_blend_init.c