Recherche avancée

Sur d’autres sites (8127)

• 504 Gateway Timeout ffmpeg video compression

  18 mai 2022, par enfix

  I have a PHP script that use the ffmpeg to compress mov file and convert in mp4.

  


  When I upload a 1gb file, this is converted and in the end appears in console 504 (Gateway Timeout).
The instruction I use is this :

  


  $cmd = shell_exec("$ffmpegPath -i $UploadedFilePath -vcodec libx264 -preset ultrafast  -filter:v scale=426:-2 $convertUrl 2>&1");


  


  How can I do ?
I would like the videos to be reduced considerably while maintaining good quality and without overloading the server.
The PHP parameters can be found at this link :
https://artruism.me/test.php

  


  UPDATE

  


  The call to the script is with ajaxForm

  


• Trying to convert an MP4 to WEBP with ffmpeg with different lossless/compression settings, but getting the same result

  10 novembre 2023, par corgrath

  I am trying to convert an MP4 video to WEBP.

  


  I am trying different -lossless and -compression_level settings (as described here), but all the output videos have identical disk size.

  


  -lossless can either be 0 or 1 and -compression_level can be from 0 to 6

  


  For example

  


  ffmpeg -y -i input.mp4 -vcodec libwebp -lossless 1 -compression_level 6 \
  -loop 0 -preset default output_lossless1_comp6.webp


  


  and

  


  ffmpeg -y -i input.mp4 -vcodec libwebp -lossless 0 -compression_level 0 \
  -loop 0 -preset default output_lossless0_comp0.webp


  


  What have I missed here ?

  


• ffmpeg best parameteres for fastest compression on FullHD mp4 ?

  3 août 2021, par Mike Azatov

  I need to compress a bunch of FullHD(1920x1080, 3Gb, mp4) videos, each 2 hrs long. Some loss of quality is okay as is the lower resolution. I'm shooting for a 500Mb output video in 10 min processing time (2080TI Ryzen 9 3900X). It is important for the videos to be completely in sync, so frame x in the input video matches frame x in output. For this, I'm using -vsync 0

  


  My current working settings which get me to 500MB size in 20 minutes.

  


  ffmpeg -i input_fullhd.mp4 -vcodec libx265 -crf 28 -vsync 0 -vf scale=800:-1 -preset medium output.mp4

  


  I'd like it to be faster with potentially slightly better quality.

  


  My concern is that I'm not utilizing my GPU at all and my CPU shows only 30% utilization. So feels like it should be possible to speed this up. I tried adding -hwaccel cuda but that made things a bit slower.

  


  Are there any other settings I can try that I'm missing to either improve my conversion or utilize more resources for speed ?

  


  Thanks