* @warning frame data will be memcpy()ed, which may be a big performance
* hit. Use av_buffersrc_buffer() to avoid copying the data.
*/
-int av_buffersrc_write_frame(AVFilterContext *s, AVFrame *frame);
+int av_buffersrc_write_frame(AVFilterContext *s, const AVFrame *frame);
#endif /* AVFILTER_BUFFERSRC_H */