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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

• Usage FFmpeg command to capture video from Apple device camera and to get 3 outputs with different resolutions (UHD, FHD, HD)

  12 décembre 2019, par Levon Gharibyan

  I use mobile-FFmpeg to execute FFmpeg commands (https://github.com/tanersener/mobile-ffmpeg).

  I am using AVFoundation, and trying to get 3 output files (3840x2160, 1920x1080 and 1280x720) from device camera.
  Here is the command :

  -f videotoolbox -f avfoundation -video_size 3840x2160 -r 30 -pixel_format nv12 -i "0:0"  -c:v h264_videotoolbox -b:v 8M -maxrate 8M -s 3840x2160 output1/path -c:v h264_videotoolbox -b:v 8M -maxrate 8M -s 1920x1080 output2/path -c:v h264_videotoolbox -b:v 8M -maxrate 8M -s 1280x720 output3/path

  But the encoding process is very slow (0.3x-0.4x speed) with that command and as a result, I can’t record realtime 30fps outputs. What am I doing wrong ? All my tests were done on the iPhone 7.

• FFMpeg - Segment audio to chunks

  8 mars 2015, par fr3sh

  I have tried this example in order to segment a given video file using ffmpeg into an m3u8 file and smaller chunks (.ts files). This actually worked great. Is it possible to do practically the same thing with audio input ?
  This was my most promising approach so far (capturing live audio on Windows OS) :

  ffmpeg -f dshow -i audio="<name of="of" input="input" device="device">" -acodec libmp3lame -ab 64000 | segmenter - 10 stream stream.m3u8 http:///stream/stream/ 5 1
  
  </name>

  But this returns this error :

  At least one output file must be specified.
  
  Could not open input file, make sure it is an mpegts file: -1

  I really would not know how to convert the live audio stream to an mpegts file.
  Could anyone please give me a hint ?

  Thanks a lot