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• How to encrypt webm file using Clear Key to play with Google's Shaka Player ?

  23 janvier 2017, par Nam Pham

  I’m developing a small system which will be used to streaming protected content over the web with MSE/EME API.

  This is some tools I’m using :

  • FFMPEG
  • Google’s Shaka-Packager
  • webm_crypt

  I can create .webm file and package them using shaka-packager into mpd file in order to feed to shaka-player. But following by the Clear Key section in the Shaka docs I have to encrypt webm file require pair of KeyId and Key.
  By using webm_crypt, I can created encrypted content by follow this document on 2.2.7 but I have no idea how to get the key pairs for the shaka-player DRM system.

• Empty error object produced by ffprobe in Google Cloud Function

  20 septembre 2023, par willbattel

  Update : After more digging I found an open GitHub issue where others appear to be encountering the same behavior.

  


  ---

  


  I have a Google Cloud Function (2nd gen) in which I am trying to use ffprobe to get metadata from a video file stored in a Google Cloud Storage bucket. It is my understanding that I can generate a signed url and, by passing that directly to ffprobe, avoid loading the entire video file into memory. I generate a signed url and pass it to ffprobe, and then parse the output like so :

  


  import ffmpeg from 'fluent-ffmpeg'
import ffprobeStatic from 'ffprobe-static'

async function getVideoData(srcFile: File) {
    const [signedUrl] = await srcFile.getSignedUrl({
        action: 'read',
        expires: (new Date()).getMilliseconds() + 60_000,
    })

    const videoData: ffmpeg.FfprobeData = await new Promise((resolve, reject) => {
        ffmpeg.setFfprobePath(ffprobeStatic.path)
        ffmpeg.ffprobe(signedUrl, (err, data) => {
            if (err) {
                reject(err)
            }
            else {
                resolve(data)
            }
        })
    })

    return videoData
}


  


  This code works (with the same signed URL) locally on my macOS machine, but does not when deployed in a 2nd generation Google Cloud Function. In the latter case, data is undefined and err is {}.

  


  My main question is how to properly use ffprobe in 2nd gen Google Cloud Functions. I have tried to research this but documentation on ffmpeg/ffprobe on GCP is sparse. I'm also trying to figure out exactly why the error object err is empty...it's not very helpful 😅

  


  Additional info :

  


  

  • Environment : Google Cloud Functions 2nd Gen

  


  • Runtime : Node 20

  


  • "ffprobe-static" : "3.1.0",

  


  • "fluent-ffmpeg" : "2.1.2"

  


  


  Thanks in advance.

  


• Revision 1c39998e39 : Add vp9_int_pro_col_neon. BUG=https://code.google.com/p/webm/issues/detail?id=1

  15 juillet 2015, par Frank Galligan

  Changed Paths :
   Modify /test/vp9_avg_test.cc

  
   Modify /vp9/common/vp9_rtcd_defs.pl

  
   Modify /vp9/encoder/arm/neon/vp9_avg_neon.c

  
  
  Add vp9_int_pro_col_neon.

  BUG=https://code.google.com/p/webm/issues/detail?id=1023

  Change-Id : I212a1d67b23ce3b5ce08800de369b25b9e375e7d