[FFmpeg-devel] Modify the source code of FFmpeg-"fprintf ()"-"av_log ()" - standard output-
moadtoufik at yahoo.fr
Mon Jul 30 02:45:59 CEST 2012
I would like to modify the source code of FFmpeg. I would like to display on the console (standard output) messages and values.
I tried to use the fprintf () function of C language, but: when i compile the files, there are error messages.The error message displays :"please use av_log () function"
However, I looked at the file log.c and log.h but I have not managed to get good information.
I want to know first, if it is possible to add instructions in the ffmpeg code to display values or messages in the console (standard output)?
If YES, what is the equivalent of the following instructions:
1 - fprintf ("I am a comment");
2-fprintf ("the quantization parameter equal %d", qp);
If NOT (that is to say, we can not view information about the console), so, where i could get these messages and these values? (I feel they are stored in the particular files, that is to say: they have a different output of standard output, Is this true?)
Frankly, a big thank for your answers.
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