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• Anybody can Explain me, what is Open GOP & Close GOP in Easy way- H.264 ?

  18 mai 2019, par user11281994

  Youtube is Mentioned that, you should have to use Close GOP, Half of the frame rate. Now in my adobe premier pro i added the TMPGEncMovieAVC101212PremPro Plugin. In this plugin, I found GOP setting but i confused how to set close GOP value.

  Also I want to know this is Close GOP structure ?
  IBBPBBPBBPBBPBP

• Join mp4 files in linux [migrated]

  18 décembre 2012, par Jose Armando

  I want to join two mp4 files to create a single one. The video streams are encoded in h264 and the audio in aac. I can not re-encode the videos to another format due to computational reasons. Also, I cannot use any gui programs, all processing must be performed with linux command line utilities. FFmpeg cannot do this for mpeg4 files so instead I used MP4Box

  e.g. MP4Box -add video1.mp4 -cat video2.mp4 newvideo.mp4

  unfortunately the audio gets all mixed up. I thought that the problem was that the audio was in aac so I transcoded it in mp3 and used again MP4Box. In this case the audio is fine for the first half of newvideo.mp4 (corresponding to video1.mp4) but then their is no audio and I cannot navigate in the video also. My next thought was that the audio and video streams had some small discrepancies in their lengths that I should fix. So for each input video I splitted the video and audio streams and then joined them with the -shortest option in ffmpeg.

  thus for the first video I ran

   avconv -y -i video1.mp4 -c copy -map 0:0 videostream1.mp4
  
  
  
   avconv -y -i video1.mp4 -c copy -map 0:1 audiostream1.m4a
  
  
  
   avconv -y -i videostream1.mp4 -i audiostream1.m4a  -c copy -shortest  video1_aligned.mp4

  similarly for the second video and then used MP4Box as previously. Unfortunately this didn't work either. The only success I had was when I joined the video streams separetely (i.e. videostream1.mp4 and videostream2.mp4) and the audio streams (i.e. audiostream1.m4a and audiostream2.m4a) and then joined the video and audio in a final file. However, the synchronization is lost for the second half of the video. Concretelly, there is a 1 sec delay of audio and video. Any suggestions are really welcome.

• I need an azure product that executes my intensive ffmpeg command then dies, and i only get charged for the delta. Any Tips ?

  31 mars 2024, par gamers hd

  I need an azure product where i can run my ffmpeg process on but i dont want to deal with acces overhead etc. But i need to be able to specify how strong the cpu and stuff should be.

  


  So consumption functions would be to weak & Premium functions are billed with a fixed rate so i cant use that either

  


  I tried first using a webapi but those are quite costly and because the commands are extremely sudden like in a couple seconds it can go to 100% cpu usage, so scalinng solutions even if i could afford it would be quite hard.

  


  I'm basicly looking for something that i can write a http triggered function for, i call it, it comes to life executes and then dies.

  


  Ps I'm a novice to Azure so if i overlooked anything obvious please let me know.