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• RTSP authentification through ffmpeg/ffplay doesn't work because of special symbols in the password

  26 octobre 2018, par Eugene Mart

  I have run into a problem while trying to receive a video from an IP-camera using ffplay.

  My rtsp request looks like this : rtsp ://login:M3%LOL$KEKfp@x.x.x.x/path/to/media.amp

  And ffplay/ffmpeg returns an 401 Unauthorized error code. I am absolutely sure that the credentials are correct. The problem is caused by the password (M3%LOL$KEKfp), which consists of special symbols like %, and #. Is there any way to make it work without changing the password ?

  I tried using quote marks like this ffplay "rtsp ://login:M3%LOL$KEKfp@x.x.x.x/path/to/media.amp", and it didn’t have any ideas ?

  PS : I’m using windows. Tried both CMD and PowerShell

• How to batch convert mp4 files to ogg with ffmpeg using a bash command or Ruby

  3 avril 2013, par TJ Sherrill

  I am running a OSX, don't know tons about video conversions. But I have like 200 videos that are all in mp4 format and won't play in Firefox. I need to convert them to ogg to use the html5 video tag.

  These files live in a folder structure that makes it hard to do files one at a time. I would like the bash command or Ruby command to go through all child folders and find all .mp4's and convert them.

  I found one reference of how to do this with Google : http://athmasagar.wordpress.com/2011/05/12/a-bash-script-to-convert-mp4-files-to-oggogv/

  #!/bin/bash
  
  for f in $(ls *mp4 | sed ‘s/\(.*\)\..*/\1/’)
  
  do
  
  ffmpeg -i $f.mp4 -acodec vorbis -vcodec libtheora $f.ogg
  
  done

  But have no idea how to convert this from linux to osx.

• Revision 422d7bc918 : Relax maximum Q for extreme overshoot. Added code to relax the active maximum Q

  28 octobre 2014, par Paul Wilkins

  Changed Paths :
   Modify /vp9/encoder/vp9_firstpass.c

  
  
  Relax maximum Q for extreme overshoot.

  Added code to relax the active maximum Q in response
  to extreme local overshoot to reduce bandwidth peaks.

  The impact is small in metrics terms, but it this helps reduce
  bandwidth spikes and overall overshoot in a number of
  clips in our tests sets (especially the YT test set).

  In particular this should help prevent very big spikes where a clip
  is mainly easy but has a short hard section. In such a case a choice
  of maximum Q for the clip as a whole may allow us to hit the overall
  target rate but give some extreme spikes. The chunked encoding in YT
  mitigates this problem but it can show up where a longer clip is
  coded as a single chunk.

  Change-Id : I213d09950ccb8489d10adf00fda1e53235b39203