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• Http live streaming for ipad, iphone and safari

  23 février 2013, par Riyas Anchal

  Anyone help me to find a solution to stream a video from a mac server to iPad, iPhone and mac safari using HTTP live streaming.

  Steps taken :

  1. Installed and configured FFMPEG for encoding
  2. installed the mediasegmenter provided by the Apple.

  The ffmpeg option used is

  ffmpeg -y -i input.mp4 -acodec aac -ar 48000 -ab 128k -ac 2 -s 1024×768 -vcodec libx264 -b 1200k -flags +loop+mv4 -cmp 256 -partitions +parti4x4+partp8x8+partb8x8 -subq 7 -trellis 1 -refs 5 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 1200k -maxrate 1200k -bufsize 1200k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -aspect 4:3 -r 30 -g 90 -async 2 output.mp4

  I have tried different ffmpeg options to stream the video.In some options it works in Iphone and Safari browser in mac machine, but I didn't get an option for iPad.

  I want to stream an mp4 video for ipad, iPhone and mac safari. I also tried it with opensource segmenter .

  Have any solution for this ?

  Thanks,

  Riyas

• iPhone slow motion video transcode

  25 mai 2016, par coverboy

  I’m developing upload video (taken from iPhone) to my server.

  However, I have no idea how to implement.

  Any source code objective-c or swift will be welcomed.

  I have 120fps or 240fps video (It’s a slo-mo).
  When I playback these video on my iPhone6. I can see slo-mo effect.
  (I know playback frame rate is 30fps.)

  I want to convert that video before upload to my server, from 120/240 fps to 30fps video. (I mean not adjusting playback frame rate, it means video transcode to 30fps.)
  Additionally, I want to check slo-mo effect start-point and end-point.
  (Maybe iPhone record this information to video binary(it might be reside in file’s header.)

  Well, I guess if I use ffmpeg library, it should be easy(?).

  So any suggestions will be welcomed.

• “Hook” libMMS to FFmpeg for iPhone Streaming

  8 novembre 2011, par Xie Xingwei

  These days, I was researching the software architechture for iPhone Streaming (Base on MMS protocol).

  As we know, in order to playback MMS audio stream, we should call libMMS to read wma stream data from remote media server, and then call FFmpeg to decode the stream data from wma format into PCM data buffer, and finally, enqueue the PCM data buffer into iPhone’s audioqueue to generate real sound.

  The introduction above just describe the working process of iPhone streaming. If we only need to implement this simple functionality, that is not difficult. Just follow the introduction above to call libMMS, FFMpeg and audioqueue step by step, we can achieve the streaming function. Actually, I have implemented the code last week.

  But, what I need is not only a simple streaming function ! I need a software architechture makes FFmpeg accessing libMMS just like accessing local filesystem !

  Does anybody know how to hook the libMMS interfaces like mms_read/mms_seek onto FFmpeg filesystem interfaces like av_read_frame/av_seek_frame ?