Dana 3. 9. 2015. 03:13 osoba "Mehdi Hosseini" <mehdi.hose...@gmail.com> napisala je: > > Hello, > > I want to do some pixel operations on a decoded frame (AVFrame structure) > in function "ff_thread_decode_frame" of the file > "ffmpeg/libavcodec/pthread.c". > > For example. I wrote a simple code to get y,u,v of the pixel(0,0) : > > int x= 0; > int y= 0; > unsigned char y = picture->data[0][picture->linesize[0]*y + x]; > unsigned char u = picture->data[1][picture->linesize[1]*y + x]; > unsigned char v = picture->data[2][picture->linesize[2]*y + x]; > av_log(avctx, AV_LOG_WARNING,"\n ** ** %c %c **",y, u,v); > > but it doesn't work. any suggestion how to access and change a specified > pixel?
Where is code ? What exactly does not work? Your case above works only for yuv444p format. > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
