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• ffmpeg remove Non-Monotonous DTS frames

  24 mars, par MiGu3X

  Is it possible to stream copy a .ts file to another .ts file by removing the Non-Monotonous DTS frames ? These frames usually also have a smaller resolution than the video I am trying to copy. I attempted this with VideoReDo but it did not work and I cannot seem to make it work.

  



  Also, the MediaInfo for the video after remixed to Matrosks shows this :

  



  Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3.2
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, RefFrames               : 2 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2 h 35 min
Nominal bit rate                         : 6 000 kb/s
Width                                    : 896 pixels
Original width                           : 1 280 pixels
Height                                   : 504 pixels
Original height                          : 720 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 30.000 FPS
Original frame rate                      : 60.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.443
Writing library                          : x264 core 148 r2579M 73ae2d1
Encoding settings                        : cabac=1 / ref=2 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=2 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=4 / lookahead_threads=1 / sliced_threads=0 / nr=250 / decimate=1 / interlaced=0 / bluray_compat=0 / stitchable=1 / constrained_intra=0 / bframes=0 / weightp=1 / keyint=122 / keyint_min=12 / scenecut=40 / intra_refresh=0 / rc_lookahead=10 / rc=2pass / mbtree=1 / bitrate=6000 / ratetol=1.0 / qcomp=0.60 / qpmin=5 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Default                                  : Yes
Forced                                   : No


  



  Thanks for the help !

  


• configure : speed up check_deps()

  5 août 2018, par Avi Halachmi (:avih)

  configure : speed up check_deps()
  x4 - x25 faster.
  check_deps() recursively enables/disables components, and its loop is
  
  iterated nearly 6000 times. It's particularly slow in bash - currently
  
  consuming more than 50% of configure runtime, and about 20% with other
  
  shells.
  This commit applies few local optimizations, most effective first :
  
   Use $1 $2 ... instead of pushvar/popvar, and same at enable_deep*
  
   Abort early in one notable case - empty deps, to avoid costly no-op.
  
   Smaller changes which do add up :
  
    - Handle $cfg_checking locally instead of via enable[d]/disable
  
    - $cfg_checking : test done before inprogress - x2 faster in 50%+
  
    - one eval instead of several at the empty-deps early abort path.
   The "actual work" part is unmodified - just its surroundings.
  Biggest speedups (relative and absolute) are observed with bash.
  Tested-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Tested-by : Helmut K. C. Tessarek <tessarek@evermeet.cx>
  
  Tested-by : Dave Yeo <daveryeo@telus.net>
  
  Tested-by : Reino Wijnsma <rwijnsma@xs4all.nl>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] configure

• I don't know the time unit to use for av_dict_set to set a timeout

  9 juin 2020, par ICYMYM

  I am confused. I am using the av_dict_set function to set a time-out, but when I searched for information about av_dict_set, the time unit seems to be different. I don't know how to set it now. Can anyone help ?

  



  I found some code like the following :

  



  pFormatCtx = avformat_alloc_context();

av_dict_set(&opts, "rtsp_transport", "tcp", 0);
//av_dict_set(&opts, "timeout", "5000000", 0);
if(strncmp(stream_url, "rtmp:", sizeof("rtmp:")) == 0){
    av_dict_set(&opts, "timeout", "6", 0); // in secs
}
else if(strncmp(stream_url, "http:", sizeof("http:")) == 0){
    av_dict_set(&opts, "timeout", "6000", 0); // in ms
}

if(avformat_open_input(&pFormatCtx, stream_url, NULL, &opts)!=0)
{
  return 1;
}


  



  Maybe it should set the time unit according to the different protocols (http or rtsp).

  



  Is the code above right ?