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• FFmpeg HLS Live Stream Stuck with iOS 11

  1er novembre 2017, par Lamorun

  I’ve exp with FFmpeg but i recent problem with iOS 11 (Recent release for Apple)

  I used FFmpeg for stream HLS Live Stream for only iPhone and iPad in closed app for online courses. My problem is the next :

  I used this code for HLS Live Stream :

  ffmpeg -i "Input" -preset fast -c:v libx264 -c:a aac -ac 1 -strict -2 -crf 18 -profile:v baseline -maxrate 1000k -bufsize 1835k -pix_fmt yuv420p -b:a 64k -flags -global_header -hls_time 20 -hls_list_size 6 -hls_wrap 10 -start_number 1 /m3u8/test.m3u8

  This work perfect in iOS 8, 9 and 10 devices. But with new version iOS 11, video is stuck after about 30 to 40 seconds, as seen in the image :

  ios11stuck

  I have searched for hours and hours. I have done many tests, but I can not get it out, since it works perfectly with iOS 8,9 and 10 (test in somes devices, even working perfectly on a device with iOS 10, update to iOS 11, and stop working immediately, downgrade to iOS 10 and work again)

  I hope someone can help me out, thank you and greetings to all

• Server side video merging with FFmpeg through oline form

  1er août 2017, par San007

  I have a difficult problem and not enough knowledge to solve it, therefore I am hoping you guys can give me some advice or redirect me to a professional or professional software which can solve my problem.

  I want something fairly simple but I simply do not know how to begin. I Googled extensively but didnt find any related topics.

  What do I want ?
  I want an online form on my website where people can select different options, which are videos, for example
  Question 1
  1 (1.mp4) / 2 (2.mp4) / 3 (3.mp4)
  Question 2
  X (X.mp4) / Y (Y.mp4) / Z (Z.mp4)
  Question 3
  Email adres :
  Generate

  When the visitor clicks the generator button it should merge the video’s the customer has selected. e.g. 1 and X will result in one video file of 1.mp4 and X.mp4 merged. The system should then after succesfully merging the videos send a download link to the users e-mail adres and ideally delete the video from the server afterwards.

  I know I have not done a whole lot of research because my knowledge simply is not enough to create my own solution, but I hope you guys can send me in the right direction, I do not mind any commercial solution.

• Livestream WebVTT with HLS

  10 novembre 2022, par kltye

  I've implemented an HLS service with ffmpeg (which pulls a live stream from nginx-rtmp). That all works fine, but now I'm wondering what kind of programming pattern I should be using to get live captioning to work.

  


  I'm planning on using ffmpeg to output the incoming mp4 stream to multiple WAV chunks (i.e., the same way HLS fMP4 parts are created), and then sending those chunks over to Azure Cognitive Services for speech-to-text recognition. My question is, what do I do when I receive the speech results ? Do I dump that vtt file into the same directory as my HLS chunks, and then serve that up using a single m3u8 file (with audio/video tracks along with the text track) ?

  


  Currently ffmpeg is updating the m3u8 playlist for HLS clients ; would it be possible for me to create the m3u8 playlist just for the vtt files, and serve that concurrently with the "regular" HLS playlist ? Also, time synchronization would seem to be difficult, because I'll be sending discrete WAV files over to Azure, so the vtt timestamps are going to be relative to the chunk I'm sending.

  


  Help ! I've done searches online, and I grasp the various issues, but I'm not sure how to plumb them all together.