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• Python Lambda function and ffmpeg command with stdout from jpg to ts file

  28 July 2021, by Sflagg

  I have a AWS Lambda Python function setup to process jpg and convert it to a ts file.

  


  I followed these instructions https://aws.amazon.com/blogs/media/processing-user-generated-content-using-aws-lambda-and-ffmpeg/ but changed the command from vfr to cfr conversion to a jpg to ts conversion.

  


  This is the command I am using

  


  ffmpeg_cmd = "/opt/bin/ffmpeg -r 30000/1001 -loop 1 -i \"" + s3_source_signed_url + "\" -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=48000 -t 30 -vcodec libx264 -crf 23 -s 1920x1080 -r 30000/1001 -g 150 -pix_fmt yuv420p -acodec aac -b:a 96k -ar 48000 -"

  


  Everything else is basically the same from the AWS article besides having s3 triggers in my Lambda look for jpeg and jpg suffixes.

  


  But this results in 0 byte ts file.

  


  I have a hunch that I need to modify the command that has a seekable output format (e.g. mpegts) when writing to stdout; currently my command is likely not working for stdout and that is why I get an empty ts file. But I am having trouble formatting the command correctly. Any help with this would be greatly appreciated!

  


• Streaming videos in multiple-bitrates without manually creating video files in each bitrate

  5 January 2014, by M.Yazdian

  I want to have a media file that I can stream at multiple bitrates using FFMPEG (for encoding and multiple bitrate generation) and Flash Media Server (for streaming).

  In "LIVE BROADCASTING" ffmpeg made multiple bitrate videos from a single bitrate source but there were no files for the different bitrates. A file would be created for different bitrates when a viewer requested that bitrate streaming video but when a request was terminated the generated file was deleted.

  So I searched in Flash Media Server and found (hds-vod), but in hds-vod I should create one file for every bitrate, for example if I have 2000 videos in my archive with HD quality (1024 kbps) I should make 4 videos with different bitrates from one video and together I have created 10,000 videos.

  So to have 2000 videos in five bitrates (1024k, 760k, 320k, 145k, 64k), and now I have 10,000 videos. I have space for 2000 videos and I don't have free space in my server for 10,000 video files.

  I want to stream "ON-DEMAND" videos in my server and not have the different bitrate files be continually generated like this.

  Does anyone have any advice?

  Thank you

• ffmpeg.exe not found inside project directory

  8 February 2019, by BayLife

  I´m currently working on my first electron / react app, which makes use of ffmpeg. I do have a problem to link the .exe file correctly.

  The prolem I´m facing is that I ffmpeg.exe is not found when trying to link it with a relative path inside my project directory. When using an absolute path it does work.

  The exe files are in the sub-folder of the current directroy.

  It does work when I´m using such path:

  'C:\\Users\\xxx\\Documents\\development\\ytDownloader\\app\\utils\\ffmpeg\\ffprobe.exe'

  But when trying it like this
  .setFfmpegPath('.\\ffmpeg\\ffmpeg.exe')

  or

  './ffmpeg/ffmpeg.exe'

  it does not working.

  Additionally I would really like to avoid using \\ in my project.

  Does someone have an Idea what I´m doing wrong here?

  I get this error message:

  Error: spawn .\ffmpeg\ffmpeg.exe ENOENT
  
      at Process.ChildProcess._handle.onexit (internal/child_process.js:229)
  
      at onErrorNT (internal/child_process.js:406)
  
      at process._tickCallback (internal/process/next_tick.js:63)