Hello, I learned how to use FFMPEG API with http://dranger.com/ffmpeg/ , and I implemented a video reader using the library SDL to display the video.
I have a HD video 1280*720 (i only worked with mp4) and i want to select a VGA-screen anywhere in the HD video (I mean cropping a VGA screen in a HD video), recuperate the data and display it on screen. In the FFMPEG API, we can use the function av_picture_crop ( https://ffmpeg.org/doxygen/2.0/group__lavc__picture.html#gadeee38e47bd67bb3cce616ce4979e9be) I get a "yellow" overlay on the cropped video and my application crashes after fews seconds. Get the compilation error : *** glibc detected *** ./HDtoVGA: corrupted double-linked list: 0x08d74e30 *** Before posting here, i read http://stackoverflow.com/questions/14696258/copy-a-rectangular-area-from-avframe-ffmpeg that the function wasn't finish yet. But when i reading the code, i don't find a way to finish it. In the FFMPEG command line tool, we can crop a video, using vf_crop https://ffmpeg.org/doxygen/2.0/vf__crop_8c.html but I don't find how to implement the same function in my code. Do you have any hint to help me? _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
