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• Requirements for using ffmpeg to create mpeg4 files in SaaS solution

  25 août 2016, par Paul Fleming

  My requirement is :
   On upload of a supported video file, convert the file to common formats to maximize web compatibility.

  Essentially, I want to take a non-web-supported video file, and converted it to WEBM and MPEG4. This will take place on a Windows Server VM inside Microsoft Azure.

  ffmpeg seems to be the de facto standard for video conversion yet it introduces licensing hell, not only with GPL/LGPL but by not offering a commercial license, meaning I now have to worry about paying royalties to MPEG-LA.

  Can anyone advise on MPEG-LAs licensing model as it applies to SaaS ? I will not be distributing ffmpeg (runs server side) and the conversion takes place on Windows (Server) OS.

• Is there a way to convert uploaded videos to browser MP4 using most basic ffmpeg ?

  22 janvier 2016, par PeterTheLobster

  I am trying to convert videos uploaded to my website to browser friendly mp4 using ffmpeg.

  The Problem : the website is hosted by a company and it seems like it does not have the codecs I need (the ones I’m aware to be browser-friendly.) I have learned that h264 and libx264 are the codecs I would want to encode the mp4 videos to, but libx264 is not present and h264 is decodable only. Doing :

  exec("ffmpeg -codecs", $output);

  tells me that :

  D V D h264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10

  I have tried converting the videos using mpeg4 codecs, but those are not supported natively in browsers it appears :

  $command ="$ffmpeg -i $target -b 1500k -vcodec mpeg4 -pix_fmt yuv420p -acodec aac -strict experimental $converted2 2>&1";
  
  exec($command, $output);

  The videos converted using the method above play only audio in chrome for example (the mpeg4 codec encoding is supported).

  Edit : I was able to convert videos to ogg and webm, but those won’t cover all browsers as far as I’m aware. Especially not the mobile ones anyway.

  Question : is there another type of basic ffmpeg, browser friendly mp4 codecs that I am not ware of or was there something wrong with my conversion $command above ? Or would I have to somehow try to install libx264 codecs and libraries ? (My guess is, that I probably cant do that to their servers, right ?)

• avfilter/avf_showvolume : implement basic rms metering mode

  23 mars 2018, par Paul B Mahol

  avfilter/avf_showvolume : implement basic rms metering mode
  Signed-off-by : Paul B Mahol <onemda@gmail.com>
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/avf_showvolume.c