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• How to increase video encoding speed in ffmpeg ?

  16 octobre 2017, par Ashutosh Tiwari

  I am recording video clips and then joining all the clips in a final video.
  Everything goes fine but the joining process takes too long.

  Tried to using some ffmpeg filters from here :
  https://trac.ffmpeg.org/wiki/Encode/H.264

  And here is my ffmpeg command that I am using to increase the speed (which seems to be wrong) :

  command = new String[]{"-y",
  
                  "-f",
  
                  "concat",
  
                  "-safe",
  
                  "0",
  
                  "-i",
  
                  "/storage/emulated/0/DCIM/my_file.txt",
  
                  "-c:v",
  
                  "-preset",
  
                  "fast",
  
                  "-crf",
  
                  "22",
  
                  "copy",
  
                  "-flags",
  
                  "+global_header",
  
                  "/storage/emulated/0/DCIM/SampleApp/" + videoOutputPath
  
          };

  Please help ! Thanks much.

• Android : Build a decoder library from Jpeg to MP4 video

  9 juillet 2014, par Ilya_Gazman

  I am working on Android 2.2, and my goal is to covert a sequence of images to mp4 video, MPEG-4_Part_14, to be more exact.

  The most reasonable solution would be using FFmpeg libraries, and compile them to Android using NDK. How ever I am looking for solution without NDK.

  I do not expect from you to build this tool for me, or find some one else who did. I spent quit of time now searching for that, and it’s some thing that probably no1 one did yet.

  So the only thing that I am asking, is help me find the specs so I be able to build the decoder by my self. I know that it’s not a trivial task(May be this is why no one did it yet), but I want to do it any way. So please just help me start it.

• Announcing x264 Summer of Code 2010 !

  19 mars 2010, par Dark Shikari — GSOC, development, google, x264

  With the announcement of Google Summer of Code 2010 and the acceptance of our umbrella organization, Videolan, we are proud to announce the third x264 Summer of Code ! After two years of progressively increasing success, we expect this year to be better than ever. Last year’s successes include ARM support and weighted P-frame prediction. This year we have a wide variety of projects of varying difficulty, including some old ones and a host of new tasks. The qualification tasks are tough, so if you want to get involved, the sooner the better !

  Interested in getting started ? Check out the wiki page, hop on #x264 on Freenode IRC, and say hi to the gang ! No prior experience or knowledge in video compression necessary : just dedication and the willingness to ask questions and experiment until you figure things out.