On 05/04/2008, at 10:32 PM, Vicente Soriano wrote:
>
> Hi!
> I'm trying to make a program that changes the color of
> some pixels by another pixels (pixels from another video
> file, aka BlueScreening). I have started to use the
> libavcodec functions, but i cannot access to the color
> of the pixels. I guess it is in the "data" var of the "AVFrame"
> struct, but, i don't know how to change the value.
No, the data cvariable of AVFrame holds the compressed video frame,
this is not what you want.
You will need to use the avcodec_decode_video call to get access to
the pixel data.
The code would look something like this...
while(av_read_frame(pFormatCtx, &packet)>=0)
{
// Is this a packet from the video stream?
if(packet.stream_index==videoStream)
{
// Decode video frame
avcodec_decode_video(pCodecCtx, pFrame, &frameFinished,
packet.data, packet.size);
// Did we get a video frame?
if(frameFinished)
{
Mark
_______________________________________________
libav-user mailing list
[email protected]
https://lists.mplayerhq.hu/mailman/listinfo/libav-user
