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• Error while compiling the Xcode project (IPhone)

  11 décembre 2012, par Raghu

  I added ffmpeg iphone port into my library and I can able to use a few of its functions like avcodec_init(),.. without any errors.
  But when I include this function call "avcodec_register_all" Xcode is giving error after compilation

  The error message is :

  *---------------
  ld : ldr 12-bit displacement out of range (4276 max 4096) in _CFRelease$stub in _CFRelease$stub from /Users/foxit/Documents/CameraTest/build/CameraTest.build/Debug-iphoneos/CameraTest.build/Objects-normal/armv6/CameraTest

  Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1

  *-------------

  Does anyone know whats wrong with this ?

  Regards,

  Raghu

• aac : correctly map 7.1ch-wide AAC from FDK AAC encoder

  4 juin 2015, par nu774

  aac : correctly map 7.1ch-wide AAC from FDK AAC encoder
  FDK AAC encoder outputs SCE(front)+CPE(front)+CPE(back)+CPE(back) on
  
  MODE_7_1_REAR_SURROUND configuration.
  
  Since decoder couldn’t properly map 4 back channels, decoding failed
  
  unless -request_channel_layout 0x8000000000000000 has been specified.
  
  Now we treat first CPE(back) as CPE(side) on channel mapping.
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  

  • [DBH] libavcodec/aacdec.c

• How do I use FFMPEG to pipe in a video file and pipe out a converted video file

  11 avril 2014, par Ranjit Aneesh

  I have very limited knowledge of FFMPEG.
  My use case is that I have a content server with a http url from where I want to pipe in a video file (The video file can be of any format) and I have to convert them to some other format, sometime changing the resolution, and then pipe out and post the video back to the content server.

  I cannot keep a copy of the video file on the local file system where I run ffmpeg since they can be of large sizes and precious time will get wasted in doing so and then calling ffmpeg for conversion and finally writing back the file to content server. I may have to support both Linux as well as windows

  My question is

  1. Is it possbile for FFMPEG to be able to read a file from an http url
  2. Is it possbile to pipe in this data in some other way to FFMPEG if 1 is not possible
  3. Is it possbile to write the data back to a http location by making a ReST put/post call
  4. If 3 is not possbile is there some other way that ffmpeg can push the data back to the server.

  Thanks