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• google speech to text errors out (grpc invalid deadline NaN)

  15 décembre 2019, par jamescharlesworth

  I have a ffmpeg script that cuts an audio file into a short 5 second clip, however after I cut the file, calling the google speech recognize command errors out.

  Creating a clip - full code link :

  const uri = 'http://traffic.libsyn.com/joeroganexp/p1400.mp3?dest-id=19997';
  
  const command = ffmpeg(got.stream(uri));
  
  command
  
    .seek(0)
  
    .duration(5)
  
    .audioBitrate(128)
  
    .format('mp3')
  
  ...

  which works fine and creates ./clip2.mp3.

  I then take that file and upload it to speech to text api and it times out (script here. When I put timeout and maxRetries argument I can get the actual error :

  Error: 2 UNKNOWN: Getting metadata from plugin failed with error: Deadline is too far in the future
  
      at Object.callErrorFromStatus (/Users/jamescharlesworth/Downloads/demo/node_modules/@grpc/grpc-js/build/src/call.js:30:26)
  
      at Http2CallStream.<anonymous> (/Users/jamescharlesworth/Downloads/demo/node_modules/@grpc/grpc-js/build/src/client.js:96:33)
  
      at Http2CallStream.emit (events.js:215:7)
  
      at /Users/jamescharlesworth/Downloads/demo/node_modules/@grpc/grpc-js/build/src/call-stream.js:98:22
  
      at processTicksAndRejections (internal/process/task_queues.js:75:11) {
  
    code: 2,
  
    details: 'Getting metadata from plugin failed with error: Deadline is too far in the future',
  
    metadata: Metadata { internalRepr: Map {}, options: {} },
  
    note: 'Exception occurred in retry method that was not classified as transient'
  
  }
  
  </anonymous>

  Stepping through the grpc code i see that the deadline is an invalid date.
  
  This seems to be causing the issue but i assume it may be from incorrect params passed into the speech client.recognize() method.

  A few other things to note :

  • The script works for some audio files, not all
  • I can upload the broken my clip mp3 clip2.mp3 to the demo app here and it works fine.
  • If I change the seek command of my ffmpeg script to start at 0.01 speech recognize command will work (however it breaks other audio clips as its not the correct starting point). I notice that when i do this the png of the mp3 gets stripped out and is a much smaller file size

• Revision deb7456058 : Fix bug which skips zeromv even if near/nearest is not 0,0. Change-Id : Id4f4548

  18 juillet 2013, par Ronald S. Bultje

  Changed Paths :
   Modify /vp9/encoder/vp9_rdopt.c

  
  
  Fix bug which skips zeromv even if near/nearest is not 0,0.

  Change-Id : Id4f454831f3f11099f39c30246adeaa52857d08d

• ffmpeg - how can I capture the timestamp of a screenshot using a seek and finding the nearest iframe ?

  17 novembre 2015, par Charles Kirk

  I’ve tried various different methods. ffprobe has always shown sensical results, with the pts_time increasing as the frames go on, using this command :

  ffprobe -show_frames video.mp4 > probestats.txt

  I thought about using that data to find the video frame nearest to the seconds I’m seeking to in ffmpeg, but I am trying to keep this performant, as I’m generating thumbnails on uploads that could exceed 5GB, which means I would end up with 50MB+ probe files to parse.

  So, currently, I’m looping over this ffmpeg command, so as to end up with 10 thumbnails total per file, regardless of length :

  ffmpeg -i video.mp4 -ss 00:00:05 -vf select="eq(pict_type\\,I)[s1];[s1]showinfo[out]" -vframes 1 -q:v 1 thumbs/thumb-1.jpg 2>&1

  The aim is to get the nearest iframe of the seconds I’m seeking to, e.g. find the nearest iframe near the 5 second mark and take a thumbnail — which gives some increased performance.

  The issue is, ffmpeg is outputting seemingly random pts_time’s, definitely not correct compared to the pkt_pts_time shown in ffprobe.

  So as the title states, I’m looking for an ffmpeg command to generate a thumbnail at the nearest iframe to a specified seek, and get the timestamp.