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• How to use ffmpeg and javascript for user to add input box inside of a video

  23 janvier 2016, par Donalda Donalda

  I work on my website and the problem i faces is that i cant find a working way to get the chance for a user to drag an input box and set it into video specifying duration for the item.

  so i have a video and a textbox and my problem is when i grag the box i want it to stck to the video and stay there.

  Code is here :

      
  
      
  
      
  
      <code class="echappe-js">&lt;script&gt;<br />
  
          function allowDrop(ev) {<br />
  
              ev.preventDefault();<br />
  
          }<br />
  
  <br />
  
          function drag(ev) {<br />
  
              ev.dataTransfer.setData(&quot;text&quot;, ev.target.id);<br />
  
          }<br />
  
  <br />
  
          function drop(ev) {<br />
  
              ev.preventDefault();<br />
  
              var data = ev.dataTransfer.getData(&quot;text&quot;);<br />
  
              ev.target.appendChild(document.getElementById(data));<br />
  
          }<br />
  
      &lt;/script&gt;
      
  
      
  
  

• avformat/segafilmenc : Don't store packet info in linked list

  17 juillet 2020, par Andreas Rheinhardt

  avformat/segafilmenc : Don't store packet info in linked list
  Up until now, the Sega FILM muxer would store some information about
  
  each packet in a linked list. When writing the trailer, the information
  
  in said linked list would be used to write a table in the file header.
  
  Each entry in said table is 16 bytes long, but each entry of the linked
  
  list is 32 bytes long (assuming 64 bit pointer and no padding).
  
  Therefore it makes sense to remove the linked list and write the array
  
  entries directly into a dynamic buffer while writing the packet (this is
  
  possible because the table entries don't depend on any information not
  
  available when writing the packet (the offset is not relative to the
  
  beginning of the file, but to the end of the table). This also
  
  simplifies writing the array at the end (there is no need to traverse a
  
  linked list).
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/segafilmenc.c

• rtl_fm piped to ffmpeg for udp stream

  4 novembre 2014, par user3936148

  rtl_fm piped to ffmpeg for udp stream

  Using Windows 7. I would like to pipe the rtl_fm standard out (pipe) to ffmpeg and udp stream it to an ip address. I have downloaded and installed rlt_sdr and other files and I have also installed sox. The console example given with the rtl_fm application using sox to play the radio station is below :

  rtl_fm -f 106500000 -M wbfm -s 200000 -r 48000 -l 0 -E deemp -g 50 - | play -r 48000 -t s16 -L -c 1 -

  This works great, using sox.

  Update :

  Below works with ffplay sounds ok not great..

  rtl_fm -f 106500000 -M wbfm -s 200000 -r 48000 -l 0 -E deemp -g 80- | ffplay -f s16le -ar 48000 -ac 1 -

  I would like to use ffmpeg instead, below is a non working example (just to give you an idea)

  rtl_fm -f 106500000 -M wbfm -s 200000 -r 48000 -l 0 -E deemp -g 50 - | ffmpeg -i - -f s16le -ar 48000 -ac 1 -acodec libmp3lame -ab 24k -ar 22050 -f mpegts udp ://192.168.1.196:1234 -

  useful links :

  http://kmkeen.com/rtl-demod-guide/

  http://sdr.osmocom.org/trac/wiki/rtl-sdr

  Thank you for your help