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• ffmpeg c# asp.net help on ProcessStartInfo

  3 mai 2012, par Arun Kumar

  I wrote the code to convert the file in c#asp.net using ffmpeg. While executing it shows error as "The filename, directory name, or volume label syntax is incorrect" but my paths are correct. So what is the solution for this ?

  ProcessStartInfo info = new ProcessStartInfo("e:\ffmpeg\bin\ffmpeg.exe", "-i cars1.flv -same_quant intermediate1.mpg");
  
  
  
  process.Start();

  I tried another way as shown below. But that is also won't works.

  ProcessStartInfo info = new ProcessStartInfo("ffmpeg.exe", "-i cars1.flv -same_quant intermediate1.mpg");

  Please help me with sample code for converting one video file format to another using ffmpeg in c# asp.net. Thanks in advance.

• getting very bad image after encoding

  20 avril 2012, par user1310596

  I am encoding images using avcodec_encode_video method and displaying them on subscriber demo of the Red5 media server.

  The problem i am facing is that all the images which are being displayed are totally distorted and nothing is clearly visible. I think something might be wrong with the pix_fmt set in avcodec context.
  Moreover image size is also quite large as 64000 bytes after encoding which I think is little weird
  Please give me solution of this problem. Any help is appreciated.

• Linking to libx264 library from c code Ubuntu

  30 janvier 2012, par Martin Conaghan

  I'm trying to write a small C application which uses the x264 API, and I'm having problems compiling the code with a link to the x264 libaray.

  In the /project/ directory there are two sub-folders :
  /project/mycode/ and
  /project/x264-snapshot-20120120-2245.

  I have installed x264 in the latter subdirectory using ./configure and then 'make'. As such the library I think I want to link to is /project/x264-snapshot-20120120-2245/libx264.a

  In /project/mycode/ I have a single source code file (prototype.c), which has the following imports :

  #include 
  
  #include 
  
  #include "../x264-snapshot-20120120-2245/x264_config.h"
  
  #include "../x264-snapshot-20120120-2245/x264.h"

  As expected, if I try to compile without linking to the x264 library, I get an error :

  /project/mycode: gcc -o prototype prototype.c
  
  /tmp/cc5NwRTp.o: In function `main':
  
  prototype.c:(.text+0x6c): undefined reference to `x264_param_default_preset'
  
  prototype.c:(.text+0xf6): undefined reference to `x264_param_apply_profile'
  
  collect2: ld returned 1 exit status

  So I try to link the library I mentioned above, but it isn't found :

  /project/mycode: gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -llibx264.a
  
  /usr/bin/ld: cannot find -llibx264.a
  
  collect2: ld returned 1 exit status

  I've tried a few variations, like :

  gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -l ../x264-snapshot-20120120-2245/libx264.a
  
  gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -llibx264
  
  gcc -I ../x264-snapshot-20120120-2245/ -llibx264.a -o prototype prototype.c

  As is probably obvious by now, I'm fairly new to this, so I'm hoping there is an easy solution