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• How to use libvlc for low-frame-rate rtsp stream decoding

  11 mai 2017, par user1547688

  I am using libvlc for RTSP h.264 bitstream decoding and display in PC. For the best experience (i.e. low latency), I uses the following options

  :file-caching=0
  
  :tcp-caching=0
  
  :rtsp-caching=0
  
  :network-caching=0
  
  :clock-jitter=0
  
  :avcodec-fast

  With these parameters, the latency is acceptable in comparison to the open-source project "ONVIF device manager"(ODM) where FFMPEG is used for decoding.

  When RTSP server deliver low frame-rate RTSP stream, (1 frame/second). These configuration will freeze after displaying a few frames (3-5 frames).

  I have tried 2 different approaches

  1. Disable synchronization by

     :clock-synchro=0

  This will enable the decoding process to go on, however, an accumulated period of time lagging could be observed.

  2. Use network-cache

  My experiments shows that

  :network-caching=1200

  Will make decoding go smoothly, however, the latency is over 1-2 second in comparison to ODM.

  Is there a way to handle the low frame rate issue in libvlc without providing such big latency ?

• gitignore : ignore object file temporaries

  10 octobre 2015, par Ganesh Ajjanagadde

  gitignore : ignore object file temporaries
  During a build, a lot of *.o.-hash files are created - had not noticed
  
  this as they are usually dumped in tmpfs on Linux. However, they
  
  sometimes are present during a long build in the project directory, making it
  
  annoying to commit while the project is being built.
  These have been observed with Clang, -fsanitize-undefined on Arch Linux,
  
  though other configurations may also generate such temporaries.
  The solution here is on lines with the Linux kernel’s .gitignore :
  
  https://github.com/torvalds/linux/blob/master/.gitignore.
  Signed-off-by : Ganesh Ajjanagadde <gajjanagadde@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] .gitignore

• download video by ffmpeg access denied [closed]

  14 septembre 2021, par Vĩnh Hội

  ffmpeg -i "https://stream2.hocmai.vn/media/FhxZzrGLdQz59MY4r2xKAA/1631218009/saturn/moon/2020-2021_s5/Toan/Luyen_thi_THPTQG/PEN-C_N3/Nguyen_Thanh_Tung/01.Ky_thuat_truy_nguoc_ham_28365/01_360.mp4/clipTo/60000/hocmai-14-v1-a1.ts" -c copy -bsf:a aac_adtstoasc "output.mp4"

  


  and fail
[https @ 000002133ca2e6c0] HTTP error 403 Forbidden
https://stream2.hocmai.vn/media/FhxZzrGLdQz59MY4r2xKAA/1631218009/saturn/moon/2020-2021_s5/Toan/Luyen_thi_THPTQG/PEN-C_N3/Nguyen_Thanh_Tung/01.Ky_thuat_truy_nguoc_ham_28365/01_360.mp4/clipTo/60000/hocmai-14-v1-a1.ts : Server returned 403 Forbidden (access denied)