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• Amazon Elastic Transcoder vs FFMPEG [on hold]

  17 janvier 2015, par KiranD

  I’m developing a website (php based) and there is a provision to upload videos in different formats. I’m using HTML5 player for the front end presentation. So, as the ideal format that is supported by most of the browsers is mp4, I tried using ffmpeg and it works fine.

  I would like to know which transcoder (Amazon Elastic Transcoder or FFMPEG) would be best for handling conversions parallely when there is a huge traffic.

  There could me approximately thousands of users watching the videos and may be hundreds uploading the videos at the same time. I’m using Amazon EC2 for deployment and the traffic is mostly spiky (not flat).

  I’m not sure about the acceptable speed. But, I need the one which can transcode the videos much faster.

• Amazon Elastic Transcoder vs FFMPEG [closed]

  7 juillet 2017, par KiranD

  I’m developing a website (php based) and there is a provision to upload videos in different formats. I’m using HTML5 player for the front end presentation. So, as the ideal format that is supported by most of the browsers is mp4, I tried using ffmpeg and it works fine.

  I would like to know which transcoder (Amazon Elastic Transcoder or FFMPEG) would be best for handling conversions parallely when there is a huge traffic.

  There could me approximately thousands of users watching the videos and may be hundreds uploading the videos at the same time. I’m using Amazon EC2 for deployment and the traffic is mostly spiky (not flat).

  I’m not sure about the acceptable speed. But, I need the one which can transcode the videos much faster.

• ffmpeg masks more than one overlay, how can I mask only one ?

  6 juin 2020, par Jonathan Winger-Lang

  I am trying to use an alpha mask to mask the corners of a video, it works. But then I try to add another image on top of them and it is also masked.

  



  How can I mask only the one video, not subsequent layers ?

  



  

  



  Here you can see that the phone frame is also masked, since it does not goo beyond the (x-axis) edges of the phone.

  



  My script :

  



  ffmpeg -i input.mp4 \
   -loop 1 -i mask.png \
   -i background.png \
   -loop 1 -i frame2.png \
-filter_complex \
   "[0][1]             alphamerge                                         [masked_video];    \
    [masked_video][3]  overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2  [phone];           \
    [phone]            scale=(iw*0.5):(ih*0.5)                            [scaled_phone];    \
    [2][scaled_phone]  overlay=100:100" \
-shortest out.mp4


  



  Thank you