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• nvenc : Delay frame output to increase encoding speed

  25 juillet 2015, par Timo Rothenpieler

  nvenc : Delay frame output to increase encoding speed
  Signed-off-by : Anton Khirnov <anton@khirnov.net>
  

  • [DBH] libavcodec/nvenc.c
  • [DBH] libavcodec/nvenc.h
  • [DBH] libavcodec/nvenc_h264.c
  • [DBH] libavcodec/nvenc_hevc.c

• What is download speed i need to watch a video of bitrate 6130 kbps ???Also does my upload speed has anything to do with it ?

  1er juillet 2017, par Tsurgi Blade

  I want to download a HLS using ffmpeg it has many program ID in playlist but i want to download this specific stream with program id 0.

  I am using -map 0:p:0 to download it but im getting bitrate of around 3000 kbps no where near to the in info...ffmpeg snapshot

  how do i get the bitrate mentioned i.e 6130 kbps....
  My download speed is around 32 Mbps= 4 MBps....
  Does it have anything to do with my upload speed ???
  Also after sometime ffmpeg says "not recieving playlist 1" and bitrate drops ???how to avoid it ??

  Thks

• Speed up poster image overlay

  17 juillet 2017, par timgavin

  Using FFMPG I’m creating a poster image from a video and adding an watermark/overlay to the poster. The following works great with small video files, but destroys my CPU with 1080p files.

  ffmpeg -ss 15 -i preview.mp4 -i play-button.png \
  
  -filter_complex overlay='(main_w-overlay_w)/2:(main_h-overlay_h)/2', \
  
  scale='min(640\, iw):-1' -vframes 1 poster.jpg

  Is there any way to speed this up ? Or should I look to another solution for the overlay ?