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• Revision 1d5223c627 : Multi-arf : Change ref buffer for primary arf. For the primary arf in a group, i

  26 juin 2014, par Paul Wilkins

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

  
  
  Multi-arf : Change ref buffer for primary arf.

  For the primary arf in a group, if multiple arfs
  are enabled and we were using arfs in the previous
  group, then allow the second arf from the previous
  group to be used as an additional reference.

  Change-Id : Iaf41706a52f54ef21548026851cd77100d6aebda

• How to make a batch file wait for all processes of another call to finish before continuing

  1er juillet 2020, par Roman Stadler

  The idea of this script is to take a (lecture) video, split it into smaller pieces, remove the silence for each one, and merge them back together, for increased performance, since the silence-removing script does not scale that well for larger videos.

  


  The 3 batch scripts below work perfectly when started manually after eachother, but when trying to launch them from a single .bat file, I can't prevent them from starting at the same time, which creates errors at the merging stage.

  


  These are the 3 batch files :

  


  

  1. split.bat

  


  2. startall.bat

  


  3. merge.bat

  


  


  Split.bat creates 10 minute long segments, afterwards, startall.bat starts one Video-Remove-Silence task for every segment. At the end, merge.bat creates one single mp4 file with all the segments.

  


  split.bat does the following :

  


  ffmpeg -i in.mp4 -c copy -map 0 -segment_time 00:10:00 -f segment out%%03d.mp4
exit


  


  startall.bat :

  


  start start000.bat
start start001.bat
start start002.bat
start start003.bat
...


  


  The start000.bat call looks like this :

  


  python video-remove-silence out000.mp4 --linear 0.0005
exit


  


  And merge.bat :

  


  :: Create File List
for %%i in (*_result.mp4) do echo file '%%i'>> mylist.txt
:: Concatenate Files
ffmpeg -f concat -safe 0 -i mylist.txt -c copy shortened.mp4

del "C:\Users\Roman\Desktop\download\mylist.txt"
del "C:\Users\Roman\Desktop\download\out*.mp4"
exit


  


  When trying either call, or start /wait, errors occur due to simultaneous execution :

  


  START /wait split.bat
START /wait startall2.bat
START /wait merge.bat


  


  So basically my question is, how can I call these 3 scripts and prevent merge.bat from starting, until all processes inside startall.bat have finished ?

  


• Microsoft Edge fails to play PlayReady DASH stream in VideoJS

  18 septembre 2023, par poepykooitje

  I have encoded some videos to x264 with ffmpeg, and packaged it to mpeg-dash with Widevine + PlayReady DRM using Shaka Packager.
With VideoJS the Widevine stream plays perfectly on both Chrome and MS Edge.
However, when I try to play the PlayReady stream on Edge, it just plays the first few seconds and then the image freezes. The audio does continue.
I see this error in the console :
VIDEOJS : ERROR : DOMException : Failed to execute 'changeType' on 'SourceBuffer' : Changing to the type provided ('video/mp4 ;codecs="avc1.4d401f"') is not supported.

  


  What I don't understand is why it says the codec is unsupported, when it plays the exact same video fine, using Widevine. The PlayReady license server also doesn't give an error at all, it's all 200 OK.

  


  The PlayReady stream works fine on other PlayReady supporting devices like a Roku or a Chromecast.

  


  Does anyone have any idea about what the problem could be here ?

  


  Thanks in advance !

  


  EDIT : It seems to be a VideoJS error, since the exact same PlayReady stream plays fine in a DRM test player (https://bitmovin.com/demos/drm). That still doesn't solve my issue though...