Return the written size and a pointer to the buffer. The buffer
must be freed with av_free().
Padding of FF_INPUT_BUFFER_PADDING_SIZE is added to the buffer.
@param s IO context
@param pbuffer pointer to a byte buffer
@return the length of the byte buffer
Return the written size and a pointer to the buffer. The buffer must be freed with av_free(). Padding of FF_INPUT_BUFFER_PADDING_SIZE is added to the buffer.
@param s IO context @param pbuffer pointer to a byte buffer @return the length of the byte buffer