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• Not able to change H264 profile to High from Main using FFMPEG API

  7 juin 2015, par AsG

  I am using QtFFMPEG wrapper(https://code.google.com/p/qtffmpegwrapper/) with Qt 5.4 and MSCV 2012. I want to encode a mp4 video from image files at 25 fps and high profile.
  I used the createFile() and encodeImage() functions from here

  I am using the below parameters :

  pCodecCtx=pVideoStream->codec;
  
  pCodecCtx->codec_id = pOutputFormat->video_codec;
  
  pCodecCtx->codec_type = ffmpeg::AVMEDIA_TYPE_VIDEO;
  
  pCodecCtx->profile=FF_PROFILE_H264_HIGH;
  
  pCodecCtx->bit_rate = Bitrate;
  
  pCodecCtx->width = getWidth();
  
  pCodecCtx->height = getHeight();
  
  pCodecCtx->time_base.den = fps;
  
  pCodecCtx->time_base.num = 1;
  
  pCodecCtx->gop_size = 10;
  
  pCodecCtx->pix_fmt = ffmpeg::PIX_FMT_YUV420P;
  
  pCodecCtx->qmin = 10;
  
  pCodecCtx->qmax = 51;

  The FFMPEG variables are :

  License: %s
  
   GPL version 3 or later
  
  AVCodec version %d
  
   3476480
  
  AVFormat configuration: %s
  
   --disable-static --enable-shared --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib

  Now I currently get a video with below properties :

  ID                             : 1
  
  Format                         : AVC
  
  Format/Info                    : Advanced Video Codec
  
  Format profile                 : Main@L3.2
  
  Format settings, CABAC         : No
  
  Format settings, ReFrames      : 1 frame
  
  Format settings, GOP           : M=1, N=10
  
  Codec ID                       : avc1
  
  Codec ID/Info                  : Advanced Video Coding
  
  Duration                       : 4s 320ms

  I want the profile to be "High" and the CABAC to be yes with 3 ReFrames. How do I achieve that ? I tried setting the profile, coder_type and max_b_frames but did not help. At times the generated file did not even play. Can anyone help please. Thanks.

  I also tried using the av_opt_set() way but could not find that function. Only function I have is av_opt_set_dict(), am I missing something - outdated FFMPEG or missing #include.

  Tried this too, didnt help-

     ffmpeg::AVDictionary *opt = NULL;
  
     int iRes = av_dict_set(&opt, "profile", "high", 0);
  
     av_opt_set_dict(pFormatCtx->priv_data, &opt);
  
     av_opt_set_dict(pFormatCtx, &opt);

  Please help.

  EDIT :
  I got a high quality mp4 by changing the qmin and qmax values and then reencoding the big sized output via command line. I will try to upgrade the FFMPEG as suggested by Ronald below. Please consider the question closed for now.

• PHP Shell Excution of ffmpeg Not Reading Bash Profile

  25 juillet 2015, par Searay330

  I understand that is a odd question and may be very specific, but I recently installed ffmpeg on a shared hosting service. While I can execute all tasks from an SSH console, when making the exact same call in PHP, I get this error.

  error while loading shared libraries : libavdevice.so.56 : cannot open shared object file : No such file or directory

  It did the same thing in PuTTY, until I updated the ~/.bash_profile with this line :

  export LD_LIBRARY_PATH=/home/searay330/ffmpeg/lib

  Does PHP not use ~/.bash_profile, or is there a different file that needs to be updated ? Any information on this topic is greatly appreciated, thank you.

• Encoding IPIPIP Frames from x264 baseline 420 profile [duplicate]

  5 août 2015, par Codec Guy

  This question already has an answer here :

  • How to control key-frame generation of ffmpeg ?
    
    1 answer
    

  I am new to FFMPEG. I am trying encode a stream in alternate I-Frames and P-Frames for the baseline profile IPIPIPIPIP.

  I searched FFMPEG forums but was not able to get the required output

  My script file :

  export LD_LIBRARY_PATH=:./FFMPEGEncLibs
  
  ./ffmpegEnc -f rawvideo -r 25 -s 176x144 -vcodec rawvideo -i ./encIn/akiyo_qcif.yuv -c:v libx264 -x264-params cabac=0:8x8dct=0 -pix_fmt yuv420p -profile:v baseline -level 4.1 -psnr -intra -qp 9 -vframes 10 ./encOut/akiyo_cif.h264

  Can someone suggest me changes to my script file, so that i would be able to encode in stream in IPIPIP format

  Thanks in advance