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• Enable VideoJS to play .mov

  18 mars 2015, par Sam

  I have set up a wordpress theme called Video Board, the site I am building allows users to upload their videos for comments. Uploading a video from a mobile device is critical, the theme supports mp4 which covers android users, however it does not support .mov. Has anyone come across a way to play .mov in videojs ?

  The server has ffmpeg installed, however the last plugin I tried needed its own upload page which worked however videos were not captured in the themes latest uploads/popular posts etc.

  I know a conversion would be the proper way to do it, but at this point I would even be happy working out a way that when users upload videos through the theme upload page, it doesn’t actually convert but just changes the file extension(renames) it to .mp4, as that is all I have been doing to fill out some content.

  I am open to all suggestions,

  Thanks,

  Sam

• How to play raw audio in Iphone ? (using ffmpeg)

  19 novembre 2011, par KayKay

  I am a student who is trying to make mms stream audio app.
  I got mms stream using libmms, and decoded wma audio using ffmpeg.
  But however I don't know What to do next.

  I recently saw similar question in stackoverflow site. (Writer is c4r1o5)
  But He used cfwritestreamwrite after avcodec_decode_audio2.
  Is that right ? I think It is not necessary because network problem finished after mms_connect, ffmpeg decode.

  Is that necessary to use ?
  I tried to put raw audio to audio buffer. and when play, It only comes with white noise.

  Please help me.
  Any hint or comment would be vey appreciated.
  Thanks in advance.

  

• Videos encoded with FFmpeg play too fast

  23 avril 2014, par Ari Black

  I’ve scoured the Google/SO/Zeranoe results and tried to integrate everything I found into making my program generate videos correctly but I still can’t get it to work right.

  I needed a good video to use as a reference so I ran :

  ffmpeg -t 5 -f dshow -i "video=Logitech HD Pro WebcamC910" CLI.mpg

  Which generated a five-second video which can be played in VLC and shows the duration and plays correctly. You can get the video here : https://drive.google.com/file/d/0B1VGi1Ts7D7TR3c4VUlyM2dIcFk/edit?usp=sharing

  I then generated a five-second video with my own code. I’ve tried to pare it down to only what I think is needed to record. You can find the code here : https://drive.google.com/file/d/0B1VGi1Ts7D7TMnFxSE1HX2FKbEU/edit?usp=sharing

  It generated a video also, with similar video quality, but VLC doesn’t show the video duration and the video seems to play too quickly. I mean that what I see on the screen looks like it’s moving slightly too fast. You can find the video my code generated here : https://drive.google.com/file/d/0B1VGi1Ts7D7TSzFGUFZEMHJwQ0U/edit?usp=sharing

  Even when you click on the links to the videos, you can see that Google is having trouble with mine but no problem with the one generated by the FFmpeg CLI. Sorry about posting everything off-site but I didn’t want to spam my code into the post and I wanted to provide as much information as I could.

  I’ve seen a number of posts about this but I can’t seem to find a definitive solution.

  EDIT :
  So I implemented your suggestions and I’m pretty sure that your answer fixed the timing issue but now I consistently get 20 non-strictly-monotonic errors before the first successful call encode_video. This happens whether I use

  gFrame->pts = gFrameIndex;

  or

  gFrame->pts = av_rescale_q(gFrameIndex, gCodecContext->time_base, gStream->codec->time_base);

  before

  ret = avcodec_encode_video2(gCodecContext, &pkt, gFrame, &got_output);
  
  if (ret < 0) {
  
    fprintf(stderr, "Error encoding frame\n");
  
    return false;
  
  }

  This seems to coincide with video artifacts at the start of the video file during playback. gFrameIndex starts at 1.

  I believe my webcam auto-focuses at the start of recordings, is it possible this is related ?

  I’ve uploaded the generated .h264 file at https://drive.google.com/file/d/0B1VGi1Ts7D7TRjRzbzZZemRaRTA/edit?usp=sharing and my most recent code to https://drive.google.com/file/d/0B1VGi1Ts7D7TbmlyYncxYzRQUTA/edit?usp=sharing.

  I really appreciate the help. Sadly, I can’t use the FFmpeg CLI directly in my software, so I have to use the library. I’m going to have to keep trucking along with it unless you can suggest a better alternative.