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• Can not play local rtsp URL using FFmpeg in iOS

  12 juin 2015, par Priyanka

  I am using FFmpeg for stream rtsp URL in iOS.
  I am trying to stream a local url but my app is failed to open url
  avformat_open_input method always return -5

  I have played the same url rtsp://172.16.1.226:5544/1 on VLC media player on my iPhone and macbook it works on both.

  After few research i have found there is some problem with rtsp_transport

  I was using av_dict_set(&serverOpt, "rtsp_transport", "tcp", 0); for the server configuration while opening url and the result is can not open feed.

  When I changed it to av_dict_set(&serverOpt, "rtsp_transport", "udp", 1);
  I am able to open url successfully but I continuously getting error rtsp 1 missing packet and so on.

  Can anybody help what should be the right configuration while opening a local rtsp url using ffmpeg.
  Should i need to update av_dict_set(&serverOpt, "rtsp_transport", "udp", 1)

  Thanks in advance

• Integrating ffmpeg in xcode5, Cannot find gcc

  22 juin 2014, par user2007547

  I have been trying to integrate ffmpeg in xcode5.
  The step [here][1]

  [1] : FFMPEG integration on iphone/ ipad project says that cc parameter needs to be gcc in iphoneOs.platform.

  But I could not find it in my xcode5.
  It is present in xcode 4.6.3 that I have.

  I tried the ./configure command with cc as gcc from xcode4.
  Something like this :

  ./configure --prefix=armv7 --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-    ffserver --enable-avresample --enable-cross-compile --   sysroot="/Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk" --target-os=darwin --cc="/Applications/Xcode4.6.3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" --extra-cflags="-arch armv7 -mfpu=neon -miphoneos-version-min=6.0" --extra-ldflags="-arch armv7 -isysroot /Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -miphoneos-version-min=6.0" --arch=arm --cpu=cortex-a9 --enable-pic

  It works ok but then the make command after fails like this :

  libavcodec/arm/mdct_vfp.S:113:unknown register alias 'TCOS_D0_HEAD'
  
  libavcodec/arm/mdct_vfp.S:114:unknown register alias 'TCOS_D1_HEAD'
  
  libavcodec/arm/mdct_vfp.S:115:unknown register alias 'TCOS_S0_TAIL'
  
  make: *** [libavcodec/arm/mdct_vfp.o] Error 1

  What am I doing wrong here ?? Where can I find gcc for xcode5 ??

• using FFmpeg converter from .mov format from portrait to landscape mode

  30 juin 2014, par Sohail Yasmin

  I have a critical problem. I am sharing the details with you.

  Problem : - I have a video file in .mov format, taken from the IPhone. This video is in portrait mode, I want to play this video on the webpage in landscape mode and vice versa.

  Please suggest me, should I convert my video from portrait to landscape mode using FFMPEG. Does FFMPEG provide this conversion feature ? If yes, Please send the exe and the command line for converting portrait video into landscape mode and vice versa.
  i am using these commands

  ffmpeg -i "Inputname.mov" -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 345k output.webm
  
  ffmpeg -i "Inputname.mov" -b 1500k -vcodec libx264 -vpre slow -vpre baseline -g 30 output.mp4
  
  
  
  ffmpeg -i "Inputname.mov" -b 1500k -vcodec libtheora -acodec libvorbis -ab 160000 -g 30 output.ogv

  any one can help to solve this issue