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• iPhone recorded videos getting rotated on Windows systems [migrated]

  11 mars 2013, par Saurabh

  I am recording videos on iPhone and uploading them to my Linux server. Users can see these videos on website. If users are seeing videos on mac or iDevices the video is looking fine but when users are seeing that video on windows systems these videos are getting rotated.

  I am assuming this is because of some apple's flag in the recorded video which Windows systems are not able to read. Can I record videos in some way so they don't get rotated on Windows systems ? Or is there any way I can re-encode videos with proper interface orientation using FFmpeg ?

  I am open to both FFmpeg or iOS way.

• How to stream live from iphone camera to server using rtsp ?

  12 septembre 2014, par Vishal Gupta

  I am using AVCaptureSession to record a video and audio of user. I am getting real time video and audio streams independently. I am able to encode them using h264 encoder and aac encoder respectively. Now I am not getting how to multiplexing them both and make a stream ? How to send them to specific server url which is protected by userName and Password ? If it can be done using RTMP also then also it’s fine.

  I have taken a reference from here ! But I am not getting much out from this.

  Is there any RTSP library project which can help me ?

  I have been struggling in it from a long.

  Is there any solution to my problem ?

  Thanks in advance.

• how to configure ffmpeg to transplant to iphone sdk 5.1 simulator and play h264 ?

  19 décembre 2012, par user1204703

  I use lastest "ffmpeg-1.0.1" and "ffmpeg-iphone-build",to transplant fffmpeg to iphone sdk 5.1 simulator.

  and use the build-i386 script in the "ffmpeg-iphone-build" project . also I add "—enable-decoder=h264" to the "CONFIGURE_OPTIONS".

  just this :

  CONFIGURE_OPTIONS="--enable-gpl --enable-postproc --enable-swscale --enable-avfilter --disable-asm --enable-cross-compile --enable-decoder=h264"

  then execute "./build-i386".
  and I also execute below batch :

  #!/bin/tcsh -f
  
  
  
  mkdir universal
  
  
  
  mkdir lib
  
  
  
  
  
  mkdir i386
  
  
  
  
  
  mv ffmpeg-i386/libavcodec/libavcodec.a i386/
  
  
  
  mv ffmpeg-i386/libavdevice/libavdevice.a i386/
  
  
  
  mv ffmpeg-i386/libavformat/libavformat.a i386/
  
  
  
  mv ffmpeg-i386/libavutil/libavutil.a i386/
  
  
  
  mv ffmpeg-i386/libswscale/libswscale.a i386/
  
  
  
  
  
  
  
  rm universal/*.a
  
  
  
  lipo -create -arch i386 i386/libavcodec.a -output universal/libavcodec.a
  
  
  
  lipo -create -arch i386 i386/libavdevice.a -output universal/libavdevice.a
  
  
  
  lipo -create -arch i386 i386/libavformat.a -output universal/libavformat.a
  
  
  
  lipo -create -arch i386 i386/libavutil.a -output universal/libavutil.a
  
  
  
  lipo -create -arch i386 i386/libswscale.a -output universal/libswscale.a
  
  
  
  rm lib/*.a
  
  
  
  cp universal/*.a lib/

  then I use the "iFreameExtractor" demo, modify the video file to "test.h264".
  code like :

  - (void)applicationDidFinishLaunching:(UIApplication *)application {    
  
      self.video = [[VideoFrameExtractor alloc] initWithVideo:[Utilities bundlePath:@"test.h264"]];
  
  }

  then run with IPhone 5.1 Simulator.
  but, fail with error :

  [h264 @ 0x91f1800] max_analyze_duration 5000000 reached at 5019130
  
  [h264 @ 0x91f1800] Estimating duration from bitrate, this may be inaccurate
  
  [swscaler @ 0x9203600] No accelerated colorspace conversion found from yuv420p to rgb24.
  
  2012-12-19 20:19:54.419 iFrameExtractor[52708:f803] video duration: -9223372036854.775391

  I think that the reason why it can not play h264 file that when I transplant the fffmpeg to the iphone simulator, and maybe do something wrong with the configure options.
  but I do not know how to fix it.

  Can you show the correct configure or other advices ?

  Thanks for your reply ??
  I am going to crash.